Session Index

Optical Design

Optical Design I
Thursday, Dec. 2, 2021  13:15-15:00
Presider: Prof. Chi-Hung Lee
Room: 302e
13:15 - 13:30
Manuscript ID.  0343
Paper No.  2021-THU-S0501-O001
Fitri Oktafiani Far-field Optical Manipulation with Low Power Illumination via Archimedean Spiral Plasmonic Lens with Single Circular Groove (CG-ASPL)
Fitri Oktafiani;Jun Quan Chen;Po Tsung Lee

We propose CG-ASPL design to manipulate particle at a distance far away from the structure surface. The optical properties and trapping performances of CG-ASPL are simulated and analyzed. A particle of 1 μm diameter can be trapped in the far-field region (1.3λ) with low power illumination of 4 mW.

13:30 - 13:45
Manuscript ID.  0234
Paper No.  2021-THU-S0501-O002
Shen-Fu Tseng Design of improving light extraction efficiency of 10μm x 10μm Micro LEDs by adding microstructures
Zhi-Ting Ye;Shen-Fu Tseng;Wei Lai

When the size of the micro light-emitting diode (micro-LED) becomes smaller, surface patterning is a way to improve the light extraction efficiency (LEE). We propose a method of adding microstructures on the surface of 10μm x 10μm micro-LED, analyzing LEE when changing the pitch and shape of structures. With a wavelength of 460 nm in 2D modules, optimized LEE with microstructures pitch of 760 nm. Compared to the micro-LED without microstructures by adding T-shaped and cylindrical microstructures, the LEE is increased by 10.3% and 11.3% in the 2D module, and 10.2% and 11.0% in the 3D module.

13:45 - 14:00
Manuscript ID.  0022
Paper No.  2021-THU-S0501-O003
Jui-Chi Chang Direct Optical Dispersion Estimation and Compensation Based on Frequency-resolved Optical Gating
Jui-Chi Chang;Chia-Yuan Chang;Shu-Yu Chang

The frequency-resolved optical gating (FROG) is a well-known technique in ultrashort pulse measurement. However, the phase retrieval is time-consuming due to the iterative procedure. In this paper we demonstrate a fast and direct optical dispersion algorithm, which can directly determine the group delay dispersion (GDD) from single FROG trace, the computation time is 13 times faster than standard principal component generalized projection algorithm (PCGPA). We also combined the direct phase retrieval FROG with the PI controller, prism-based compressor to achieve automatic compensation system to multiphoton excitation fluorescent microscopy (MPEFM), the reconstructed image intensity can be elevated up to 1.6 times.

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14:00 - 14:15
Manuscript ID.  0262
Paper No.  2021-THU-S0501-O004
Chun-Ting Sung Path Following of Field Tracked Robots Based on Model Predictive Control with Identified State-Space Dynamic Model
Chun-Ting Sung;Wen-Chuan Tseng;Meng-Hui Hsu;Shean-Jen Chen

The state-space dynamic model of a tracked robot in orchard has been identified with more than 50% estimated fitting, and then utilized in the model predictive control (MPC) process. The MPC with the model can precisely follow the reference paths according to suitable prediction and control horizons under multivariable constraints. The inputs of system identification are the different white noises of left and right tracked speed. We use Intel D435i depth camera with ORB-SLAM on Robot Operating System (ROS) to provide the localization information as the outputs. From the experimental result, system identification with MPC can follow the path correctly.

14:15 - 14:30
Manuscript ID.  0306
Paper No.  2021-THU-S0501-O005
Sumesh Nair Effective Laser Pest Controller with Modulated UV-A Light Trap for Mushroom Fungus Gnats
Sumesh Nair;Ching-Chieh Su;Chia-Wei Hsu;Ming-Jeh Chien;Shean-Jen Chen

Fungus gnats cause significant damage and economic loss to mushroom plantations. In their young larvae stage, they feed rampantly on the mycelium of the mushrooms, rendering them useless for trade and human consumption. As an alternative to inconvenient and time consuming physical pest control methods and chemical pesticide overuse, we utilize frequency modulated UV-A light trap (365nm) to attract the fungus gnats to a small spot area, and then employ quick laser scanning to eliminate the pests in the area efficiently.

14:30 - 14:45
Manuscript ID.  0268
Paper No.  2021-THU-S0501-O006
Ngoc Thi Thu Le Precise Mid-field Modeling for UVC LEDs by using Fluorescent Film
Ngoc Thi Thu Le;Shih-Kang Lin;Ching-Cherng Sun;Chi-Shou Wu;Tsung-Hsun Yang;Yeh-Wei Yu

We present a mid-field model for a UVC LED by comparison of the 2-D irradiance pattern. Because of UVC light, we propose using fluorescent film which absorbs UV-C light and re-emits visible light so that the 2-D irradiance light pattern could be captured by a CCD or CMOS sensor, and then we compare with the corresponding simulation in mid-field distance.

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Optical Design

Optical Design II
Thursday, Dec. 2, 2021  15:15-17:00
Presider: Prof. Guo-Dung Su
Room: 302e
15:15 - 15:30
Manuscript ID.  0190
Paper No.  2021-THU-S0502-O001
Cheng-Jung Yang Accurate Deformable Mirror Identification for Adaptive Optics and Aberration Manipulation
Cheng-Jung Yang;Chia-Yuan Chang

Aberrations generated as the light passed through optical components and specimen. Based on the proposed identification algorithm, we constructed the first and second order aberration shape of Zernike polynomials with electrostatic membrane deformable mirror (DM). Due to the coupling effect of the DM itself, we then applied PI closed loop controller for more precisely converging to separately shape of the Zernike polynomial. The identified model can be implemented for more accurate adaptive optics correction and practical application such as auto-focusing based on aberration manipulation technique.

  Preview abstract
15:30 - 15:45
Manuscript ID.  0031
Paper No.  2021-THU-S0502-O002
Ching-Yao Huang Comparison of Power Distribution in Spherical and Aspherical Tilted Prescription Lenses
Ching-Yao Huang

This study is to measure and compare the power distribution in spherical and aspherical tilted prescription spectacle lenses at different tilt angles. The results show that the effective power change along the tilt direction is less in the aspherical tilted lenses than in the spherical tilted lenses.

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15:45 - 16:00
Manuscript ID.  0047
Paper No.  2021-THU-S0502-O003
Cheng-Mu Tsai A Study of wide FOV Optical See-through Head-Mounted Display with Dihedral Corner Reflector Array
Jun-You Li;Cheng-Mu Tsai

An optical see-through (OST) head-mounted display (HMD) is based on a dihedral corner reflector array (DCRA) to give a wide field of view (FOV). A simulation modes combining the HMD lens, DCRA and eye model show that the eye can receive the display information in the wide FOV.

16:00 - 16:15
Manuscript ID.  0121
Paper No.  2021-THU-S0502-O004
Chaohsien Chen Chromatic Aberration Variations of Conceptual Thick Lenses
Chaohsien Chen

New conceptual lens modules which can predict the variations of primary chromatic aberrations and secondary spectrum for real thick optical lenses are proposed. They are capable of studying the chromatic aberration behaviors of conceptual lenses without their detailed structures. As a comparison, they also provide accurate results than some commercial optical software.

16:15 - 16:30
Manuscript ID.  0353
Paper No.  2021-THU-S0502-O005
Chia-Hui Chen Combination analysis of four common membrane stack formulas applied to dual narrow-band-pass filters
Chia-Hui Chen;Zhi-Ting Ye

This research puts forward four common membrane stack formulas and finds a relatively better membrane stack formula applied to the dual narrow-band-pass filters. We found that the Air/(LH)M L 2H L (HL)M/Sub membrane stack formula compared to the other three membrane stack formulas not only has a relatively better filtering effect on the cut-off wavelength but also at 532.5nm full width at half maximum(FWHM) of 21nm, the average transmittance is 92.97%, and 620nm FWHM 40.5nm, the average transmittance is 97.17%.

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16:30 - 16:45
Manuscript ID.  0401
Paper No.  2021-THU-S0502-O006
Arvind Mukundan Detection of PM2.5 and PM10 Concentration Using Hyperspectral Imaging
Arvind Mukundan;Chi -Wen Chen;Yu -Sheng Tseng;Hsiang -Chen Wang

This study proposes a method of detecting air pollution using hyperspectral imaging technology of visible light, near-infrared, and far-infrared. By assigning hyperspectral information to the images of monocular, near-infrared, and thermal imaging, principal component analysis is performed on the hyperspectral images. Beer-Lambert law and multivariate regression analysis are used to calculate the PM2.5 and PM10 concentrations which are compared with the corresponding PM2.5 and PM10 concentrations from the Taiwan Environmental Protection Agency to evaluate the accuracy of this method. This study reveals that the accuracy in the visible light band is higher than the Near-Infrared and Far-Infrared bands.

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Optical Design

Optical Design III
Friday, Dec. 3, 2021  10:45-12:00
Presider: Prof. Pin Han Prof. Cheng-Mu Tsai
Room: 302e
10:45 - 11:00
Manuscript ID.  0089
Paper No.  2021-FRI-S0503-O001
Yu Tang Cheng Research on Design Rule of Micro-LED Backlight by Deep Reinforcement Learning
Yu Tang Cheng

In this study, we use LightTools to build a 5 x 5 Micro-LED array model with the Distributed Bragg Reflector (DBR) optical material created by RSoft. Use DBR to suppress the intensity of the active light, so that the light intensity from the side to achieve high uniformity of the light source module. Through the Reinforcement Learning (RL) to find the best solution for illuminance uniformity.

11:00 - 11:15
Manuscript ID.  0261
Paper No.  2021-FRI-S0503-O002
Yu-Cheng Sung Path Following and Obstacle Avoidance of Field Tracked Vehicles via Model Predictive Control with Deep Deterministic Policy Gradient
Yu-Cheng Sung;Shean-Jen Chen;Wen-Chuan Tseng;Chun-Ting Sung;Jen-Yu Lee

The path following and obstacle avoidance of a field tracked vehicle is conducted by using the model predict control (MPC) with the controller (agent) trained by deep deterministic policy gradient (DDPG). The MPC forces the vehicle to follow the global reference path and the DDPG agent generates a new local path to avoid obstacles.
Reinforcement learning has been successfully applied to various tasks, but still there some problems due to low sample efficiency and inability to deal with large time delay. Therefore, our work is combined the MPC with the DDPG.

11:15 - 11:30
Manuscript ID.  0483
Paper No.  2021-FRI-S0503-O003
Yong-Sheng Lin One kind of endoscope which can use to construct the three dimension model of a baglike organ
Yong-Sheng Lin;Shi-Hwa Huang;Ching-Cherng Sun

One kind of new endoscope introduced here, it consists of a new type sensor and a new optical system which can construct the three dimension model of a baglike organ.

  Preview abstract
11:30 - 11:45
Manuscript ID.  0029
Paper No.  2021-FRI-S0503-O004
Chu-En Lin Design of an optical neural network to develop a logic NAND gate with supervised learning method
Chu-En Lin;Ching-Pao Sun;Chii-Chang Chen

In this article, we establish an optical neural network to achieve a NAND gate with supervised learning method. The optimized bit error rate is 0.2495 as well as the normalized root mean square error is 0.65. Thus, through our result, our design could be a potential photonic device.

11:45 - 12:00
Manuscript ID.  0685
Paper No.  2021-FRI-S0503-O005
Ming-Hsiang Chuang Measurement of thermal stress, thermal expansion coefficient and biaxial modulus of optical notch filter
Ming-Hsiang Chuang;Chuen-Lin Tien;Hong-Yi Lin

This work is to explore the nine-layer notch filter (SiO2/Nb2O5) with the center wavelength of 480 nm deposited by electron gun evaporation technology, and using the dual substrate technology to measure the coefficient of thermal expansion (CTE), biaxial modulus and thermal stress changes of the thin film.


Optical Design

Optical Design IV
Friday, Dec. 3, 2021  13:00-14:30
Presider: Prof. Chuen-Lin Tien Prof. Pin Han
Room: 302e
13:00 - 13:15 Award Candidate (Paper Competition) Award Candidate (Applied Optoelectronics Competition)
Manuscript ID.  0005
Paper No.  2021-FRI-S0504-O001
Yu-Teng Chia Highly Sensitive Open-cavity Fiber Fabry–Pérot Gas Pressure Sensor Based on Vernier Effect
Yu-Teng Chia;Chin-Ping Yu

A novel open-cavity fiber Fabry–Pérot interferometers (FPIs) formed by splicing two hollow-core fibers with a large offset is connected with a sealed-cavity fiber FPI in parallel to induce the Vernier effect for gas sensing. Four times higher gas pressure sensitivity of -128 pm/psi can be obtained.

13:15 - 13:30 Award Candidate (Paper Competition) Award Candidate (Applied Optoelectronics Competition)
Manuscript ID.  0697
Paper No.  2021-FRI-S0504-O002
Tsung-Han Wu Broadband THz telecentric f-theta lens for real-time THz hyperspectral microscopy
Tsung-Han Wu

Terahertz (THz) telecentric f-theta scanning lens plays an important role in the THz hyperspectral microscopy system. Beam scanning using telecentric f-theta lens provides uniform spot size, linear displacement, and normal incidence angle at the focal plane. In this work, we design a telecentric f-theta lens with superior performance on distortion (<0.012%). We are competent to fabricate our scanning lenses by using CNC technology. We observe approximately 4mm spot size and a broadband image from 0.4 to 1.0 THz. As a result, our design can resolve different diameters circular patterns with resolution better than 5mm.

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13:30 - 13:45 Award Candidate (Paper Competition) Award Candidate (Applied Optoelectronics Competition)
Manuscript ID.  0077
Paper No.  2021-FRI-S0504-O003
XIN LI LEE Optimization of Optical Autocorrelator with Low-Cost LED Based on Two-band Model
XIN LI LEE;Jui-Chi Chang;Shu-Yu Chang;Chia-Yuan Chang

Autocorrelator is widely used in measuring ultrashort pulse. Conventionally, an autocorrelator collocates with an expensive BBO crystal. Based on the two and three photon absorption property of light-emitting diodes (LEDs), we can replace the crystals with very low-cost LEDs. The two-photon absorption (TPA) and three-photon absorption (3PA) of LED are simulated based on the two-band model and verified with experiments. The interferometric autocorrelation is measured by using red LED and get background-signal ratio equals to 1:8.

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13:45 - 14:00 Award Candidate (Paper Competition) Award Candidate (Applied Optoelectronics Competition)
Manuscript ID.  0129
Paper No.  2021-FRI-S0504-O004
Yi-Lun Su The Periscope-type of Mobile Phone Lens with 10 Optical Zoom Design
Yi-Lun Su;Wen-Shing Sun

A periscope zoom lens depth depends either on the prism thickness or the maximum aperture of the zoom lens in the Y-direction. To reduce the periscope zoom lens depth to 7 mm for Mobile Phone device and use a 5 megapixel sensor as 16:9 aspect ratio sensor with rectangular aperture.

  Preview abstract
14:00 - 14:15 Award Candidate (Paper Competition) Award Candidate (Applied Optoelectronics Competition)
Manuscript ID.  0681
Paper No.  2021-FRI-S0504-O005
Hong-Yi Lin An Image-Based Collimator for Measuring Focal Length of Optical Lenses
Hong-Yi Lin;Chuen-Lin Tien;Chih-Kai Chang

We present an optical measuring system for the focal length of optical lenses. Four different lenses were tested by the proposal method. The measuring ranges of focal length were 16 to 100 mm. The results showed that difference value of the focal lengths was less than 0.5 mm.


Optical Design

Poster Session I
Friday, Dec. 3, 2021  14:00-16:00
Presider: Prof. Chuen-Lin Tien Prof. Guo-Dung Su Prof. Pin Han
Room: Corridor
Award Candidate (Paper Competition) Award Candidate (Applied Optoelectronics Competition)
Manuscript ID.  0332
Paper No.  2021-FRI-P0501-P001
Yi Teng Hsu Development of a Coplanar Type Grating Interferometer for Measurements of Two-degree-of-freedom Displacements
Yi Teng Hsu;Shao Heng Chen;Hung Lin Hsieh

In this study, a novel “coplanar detection type grating interferometer” is proposed. It adopts “coplanar detection” as the core technique and combines with the techniques of heterodyne interferometry, grating interferometer and double-diffraction optical configuration, which makes the proposed system form multiple detection configurations on the same detection surface and have excellent measurement performance with high resolution and high stability.

Award Candidate (Paper Competition) Award Candidate (Applied Optoelectronics Competition)
Manuscript ID.  0386
Paper No.  2021-FRI-P0501-P002
Su Hui Cheng Electrically tunable broadband color filters based on heliconical liquid crystal structures
Chi Tang Huang;Su Hui Cheng;Chin Jung Chiu;Ko Ting Cheng

In this study, the heliconical liquid crystal (LC) structures are adopted to make an electrically tunable broadband color filter; moreover, the trends of color variations are also successfully demonstrated through the approach of Jones Calculus, and to a large extent, the simulated results are coincident with the experimental ones.

Award Candidate (Paper Competition)
Manuscript ID.  0454
Paper No.  2021-FRI-P0501-P003
Shu Ching Chang Immediate detection of polarization states of unknown polarized lights using dichroic dyes-doped liquid crystals
Shu Ching Chang;Min Ci Liao;Cheng Kai Liu;Chi Tung Huang;Ko Ting Cheng

This study demonstrates the way to detect polarization state of a polarized light with unknown polarization immediately by using an axially symmetrical dichroic dyes-doped liquid crystals (ASDDdLCs). A charge coupled device (CCD) records an image of a polarized light after passing through the ASDDdLCs. A program is used to analyze the images recoded by the CCD to immediately analyze its polarization state. The method has potential to be applied in various optical fields.

Award Candidate (Applied Optoelectronics Competition)
Manuscript ID.  0492
Paper No.  2021-FRI-P0501-P004
Hao-Sheng Zhang Design and Realization of Wide Field-of-view 3D MEMS LiDAR
Hao-Sheng Zhang

We proposed a design method to simulate a MEMS LiDAR system. Combining a MEMS mirror and a wide-angle lens into the system, small-volume and large field-of-view (FOV) LiDAR systems can be realized. The FOV of our LiDAR system is 104 degrees and the maximum error is less than 2%. In order to experimentally demonstrate the small-volume MEMS scanning LiDAR, a modular laser rangefinder is used with a MEMS mirror. Finally, the scanned data is converted into a 3D point cloud image by an image processing program, and the generated image proves the complete function of the proposed LiDAR.

Award Candidate (Paper Competition) Award Candidate (Applied Optoelectronics Competition)
Manuscript ID.  0522
Paper No.  2021-FRI-P0501-P005
Yu-Teng Chen Design NIR Achromatic Metalens By Particle Swarm Optimization
Yu-Teng Chen;Peichen Yu;Yu-Fan Lin;Wei-Ping Liao

We investigate the focusing efficiency and focal length dependence of a near infrared region metalens for a broadband design. First, we design a 1550 nm working wavelength metalens, then we extend working wavelength from 1500 nm to 1600 nm by particle swarm optimization (PSO) method .Finally, it is found that the working stage of the 1550nm metalens will cause the focal length to drop due to the increasing wavelength, our achromatic metalens can effectively reduce the displacement of the focal length.

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Award Candidate (Paper Competition) Award Candidate (Applied Optoelectronics Competition)
Manuscript ID.  0568
Paper No.  2021-FRI-P0501-P006
Pei-Chieh Chen Development of a linear encoder based on common-path design
Pei-Chieh Chen;Shao-Heng Chen;Hung-Lin Hsieh

In this study, a novel linear encoder based on common-path design is proposed for displacement measurement. The proposed technique combines the advantages of grating interferometry and common-path, which makes the system not only can provide accurate displacement information but also have excellent stability. It can be seen from the experimental results, the measurement resolution and repeatability can reach 3 nm and 3 nm, while the stability is about 3.9 nm within 10 minutes, respectively.

Award Candidate (Paper Competition)
Manuscript ID.  0703
Paper No.  2021-FRI-P0501-P007
Chun-Yu Chiang Improvement of Thickness Uniformity of Thin Oxide Films Deposited on Large Substrates
Kuan-Sheng Cheng;Chuen-Lin Tien;Hong-Yi Lin;Chun-Yu Chiang

Thin films were deposited on a large substrate holder with a diameter of 275 mm, which was divided into five segments. Thickness uniformity of five different segments is analyzed. The experimental results show that film thickness uniformity is 0.36% for Ta2O5, 0.38% for SiO2, and 0.15% for Nb2O5 thin films.

Award Candidate (Paper Competition) Award Candidate (Applied Optoelectronics Competition)
Manuscript ID.  0715
Paper No.  2021-FRI-P0501-P008
Hao-Hsin Huang Electrically Tunable Polarization Independent Liquid Crystal Lenses Based on Orthogonally Anisotropic Orientations On Adjacent Micro-Domains
Hao-Hsin Huang;Ting-Wei Huang;Yi-Hsin Lin

We demonstrated a polarization independent liquid crystal phase modulation based on the
orthogonal nematic LC mode wherein the optics axes of nematic liquid crystal molecules are
set orthogonally to adjacent sub-domains for the first time. A polarizer-free LC micro-lens is
demonstrated. The impact is for ophthalmic lenses and augmented reality.

Award Candidate (Paper Competition) Award Candidate (Applied Optoelectronics Competition)
Manuscript ID.  0714
Paper No.  2021-FRI-P0501-P009
WEI-CHENG CHENG Varifocal augmented reality adopting electrically tunable uniaxial plane-parallel plates

A varifocal AR system is demonstrated adopting electrically tunable liquid crystal (LC) plane-parallel plates to solve vergence-accommodation conflict problem. In experiments, the projected virtual image can be adjusted from 1.4 m to 2.1 m away from the AR system while the thickness of LC plane-parallel plates < 3mm.


Manuscript ID.  0055
Paper No.  2021-FRI-P0501-P010
Cheng-Yu Wu Optimization of Optical Aberration Identification for Membrane Deformable Mirror in Adaptive Optics
Cheng-Yu Wu

In general optical system, aberration is a common phenomenon that degrades the system performance. We use Zernike polynomials to describe aberrations. The low order eight Zernike modes are used as the fitting target. Based on the identification process, the membrane deformable mirror (DM) can generate the corresponding surface shape of the desired Zernike mode. In order to make the identification more accurate, we use PI controller to find the best combination of the identified voltage maps that drive the DM to have much better shape for individual Zernike modes.

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Manuscript ID.  0062
Paper No.  2021-FRI-P0501-P011
JUI-TSE YANG Compact Adaptive Optics System with FPGA-based Parallel Controllers

With the proposed membrane deformable mirror (DM) identification process, we can obtain the voltage maps of DM for generating individual first order Zernike polynomial. In this manner, we can design 8 separate proportional integral (PI) controllers to eliminate the aberrations rapidly and simplify the controller complexity. The experimental results show that we can compensate the static disturbance and the dynamic disturbance efficiently.

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Manuscript ID.  0080
Paper No.  2021-FRI-P0501-P012
Pin Han High Performance three dimensional coupling structure for high power Laser diode module
Jun-He Hong;Fu-Yu Xie;Hsun-Ching Hsu;Kuo-Wei Lin;Pin Han

A novel scheme using three-dimensional (3D) coupling structure to build a laser diode (LD) module is proposed, which utilizes the fiber’s angle space more completely. Compared with the traditional 2D configuration, the number of LD is increased by 15, and the efficiency over 90% efficiency can be still obtained.


Manuscript ID.  0238
Paper No.  2021-FRI-P0501-P013
Chang Jui Chen Optimization of LED Mosquito Trap Systems
Chang Jui Chen

A mosquito collecting component that can be externally attached to the air inlet of the
LED mosquito trapping system has been developed to optimize the efficiency of the mosquito
trapping lamp and increase the mosquito trapping capacity. Use 3D CAD software Soildworks to
build the system module, and use flow simulation to simulate thewind field. Import the module
into Tracepro for optical simulation, and observe the light field changes on the light pattern. Finally,
the module is used to actually measure and capture mosquitoes. After obtaining the data, the best
mosquito-trapping efficiency can be optimized.


Manuscript ID.  0709
Paper No.  2021-FRI-P0501-P014
Hong-Yi Lin Surface Profile and Residual Stress Measurement of Multilayered Notch Filter Coated on Large-size Wafers
Yan-Tong Lai;Chuen-Lin Tien;Hong-Yi Lin

The surface morphology and residual stress measurement of multilayered notch filters deposited on a 12-inch wafer was presented. A homemade projected fringe reflectometer was developed. Experimental results show that the surface warpage decreases from 27.66 μm to 9.7 μm. The residual stress of the multilayered notch filter was 0.21 GPa.


Manuscript ID.  0558
Paper No.  2021-FRI-P0501-P015
Yi-Chien Wu DMT Communication beyond 5 Gbit/s with A Green 2×2 Micro-LED Array
Yi-Chien Wu;Yi-Che Lee;Gong-Ru Lin

A green 2×2 micro-LED array with nanostructured grating patterns was enclosed in a TO-can with an SMA connector, grown on a semi-polar (20-21)-oriented GaN buffered layer on a (22-43)-oriented sapphire substrate. Supported bit-loaded DMT algorithms for very high-speed data transmission beyond 5 Gbit/s.


Manuscript ID.  0716
Paper No.  2021-FRI-P0501-P016
Chang-Nien Mao Electrically Tunable Vision Correction via Liquid Crystals for Near-eye Display Systems
Chang-Nien Mao;Wei-Cheng Cheng;Wen-Sung Kuo;Yu-Jen Wang;Yi-Hsin Lin

The AR eyeglasses are designed for 20/20 vision. However, human eyes differ. In this paper, a near-eye display system with electrically vision correction is demonstrated. The tunable range of the liquid crystal lens is around 4.5 Diopter with aperture size of 20 mm. The voltage is less than 20 Vrms.

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Optical Design

Optical Design V
Saturday, Dec. 4, 2021  09:00-10:30
Presider: Prof. Hsiao-Yi Lee Prof. Cheng-Mu Tsai
Room: 302e
09:00 - 09:30
Manuscript ID.  0728
Paper No.  2021-SAT-S0505-I001
Invited Speaker:
Ozan Cakmakci
Recent advances in flat and curved lightguides
Ozan Cakmakci

09:30 - 09:45
Manuscript ID.  0219
Paper No.  2021-SAT-S0505-O001
Ru Pei Chen Achromatic polarisation rotator tuned by electric field
Ru Pei Chen

We demonstrate an achromatic, tunable polarization rotator (PR). By applying an electric field to control the liquid crystal, it continuously rotates up to 90° in an adiabatic and nondispersive manner. This mechanism can be used for single-path ultrawideband with complex vector fields in polarized light.

09:45 - 10:00
Manuscript ID.  0243
Paper No.  2021-SAT-S0505-O002
Pin Han Slit diffraction spectrum manipulation in non-paraxial regions via the spatial-spectral correspondence relationship
Che-Yi Lin;Yen-Zhen Qiu;Hsun-Ching Hsu;Pin Han

In the past, a two-dimensional aperture diffraction of light in the non-paraxial region could only be studied using the Huygens integral without functional forms. This work presents a special case—a one dimension slit where the functional form can be obtained. Three interesting spectral effects are described: spectral switches, multi-level data transmission, and optical wavelength ruler.

10:00 - 10:15
Manuscript ID.  0110
Paper No.  2021-SAT-S0505-O003
Wei-Chih Lin Measurement of Guitar Timbre Using Laser Displacement Sensor with Nanometer Precision
Wei-Chih Lin;Tsung-Yu Hsieh;Kuan-Cheng Su;Chii-Chang Chen

In this work, we study the timbres of Apoyando and Tirando for the classical guitars, which excite mainly the strings perpendicularly and parallel to the soundboard, respectively, by using laser displacement sensor. The natural frequency of the guitar body and the pitch of the strings with overtones can be observed in the spectra. The results show that the low-pitch natural frequency and the high-pitch overtones are stronger when the strings are plucked by Apoyando and Tirando, respectively inducing the different timbres. With this effect, the guitarists can deliver the warm or joyful feeling during the performance.

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10:15 - 10:30
Manuscript ID.  0573
Paper No.  2021-SAT-S0505-O004
Yi-Chun Wu Stability analysis of the MEMS scanner with optical coherence tomography imaging technology
Yi-Chun Wu;Ming-An Chen;Ting-Hao Chen;Ting-Yen Tsai;Chuan-Bor Chueh;Hsiang-Chieh Lee

Recently, MEMS scanners driven by the electrostatic actuation mechanism are increasingly being used in optical coherence tomography applications because of the low operating power, fabrication friendliness, fast response and lowest power consumption. However, most MEMS scanners driven by electrostatic actuation commercially available nowadays encounter scanning stability issues because of the open-loop driving mode. In this study, we have developed a swept-source OCT(SS-OCT) system to investigate the scanning stability of two different MEMS scanners which was operated in open-loop and close-loop driving mode individually. Repetitive cross-sectional OCT images of the fixed pattern target were acquired with a different scanning speed.


Optical Design

Poster Session II
Saturday, Dec. 4, 2021  09:30-11:30
Presider: Prof. Cheng-Mu Tsai Prof. Pin Han
Room: Corridor

Manuscript ID.  0672
Paper No.  2021-SAT-P0502-P001
Hsing-Yu Wu Survey of past and current periscope system
Hsing-Yu Wu;Li-Jen Hsiao;Jin-Cherng Hsu

Historically, the periscope is the surveying subsystem of an indigenous submarine to observe objects above the sea while the submarine remains submerged. This paper reports the specification of a periscope in the past and analyzed the current system and a preliminary modeling result will also be evaluated.

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Manuscript ID.  0342
Paper No.  2021-SAT-P0502-P002
Jyh-Rou Sze Gradient Intensity Axial Beam
Jyh-Rou Sze;An-Chi Wei

A gradient-intensity axial beam with properties of a narrow lateral spot and the gradient intensity along the optical axis is applied to the confocal profilometer for the surface-profile inspection. The experimental implementation of the gradient-intensity axial beam of pseudo Bessel beams is carried out and compared with the theoretical results.


Manuscript ID.  0418
Paper No.  2021-SAT-P0502-P003
Cheng-Kai Yao Fiber-Optic Vibration Detection Based on Fiber Bragg Grating Sensor
Cheng-Kai Yao;Peng-Chun Peng

We demonstrated the capability of 25 Hz vibration detection made by utilizing a motor on an optical fiber at a distance of 50 kilometers, utilizing a fiber Bragg grating sensor with an operating wavelength of 1544.9 nm.

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Manuscript ID.  0421
Paper No.  2021-SAT-P0502-P004
Cheng-Kai Yao Fiber Bragg Grating Sensor System Using Artificial Neural Network
Cheng-Kai Yao;Peng-Chun Peng

We proposed an artificial neural network-integrated with a fiber Bragg grating (FBG) system for the accuracy of strain measurement. From the result, the artificial neural network has good performance comparing to the Gaussian fitting method.

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Manuscript ID.  0639
Paper No.  2021-SAT-P0502-P005
Chih-Jen Yu Electrically rotating phase retarder by using an electro-optic device
Chih-Jen Yu;Cheng-Xun Chou;Chih-Ching Ho;Zen-Lun Li;Chih-Wen Chi

An optical setup that is equivalent to an electrically rotating polarization element (ERPE) is proposed. The principal axis of the ERPE can be changed by applying an electric signal on an electro-optic modulator of this setup. This ERPE can be applied for a linear phase retarder with arbitrary phase retardation.


Manuscript ID.  0710
Paper No.  2021-SAT-P0502-P006
Chien-yu Chung Optical Design of Frog Mirror with Third-order Aspheric Lens
Chien-yu Chung

In this study, Zemax is used to simulate the human eye and analyze the difference between the front and the rear of the frog mirror with a third-order aspheric lens. The effective focal length is used to optimize the parameters of the first and second sides of the frog mirror to achieve better imaging quality and clearer imaging results. The different refractive between water and air, is discussed in order to reduce the discomfort of the wearer's vision due to the difference in degrees in the water and in the air caused by the power of the frog mirror.

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Manuscript ID.  0214
Paper No.  2021-SAT-P0502-P007
Cheng-Hao Chang Spectrum Extraction by Light Modulation and Three-parameter Sine Curve Fitting
Cheng-Hao Chang;Yun-Hsiang Chang;Yu-Lin Chang;Hung Chih Hsieh

A sinusoidal intensity modulated light source as a test signal and incident to a spectrometer. In order to separate the tested spectrum from a stray light mixed spectrum, the three-parameter sine fitting algorithm was used to calculate the amplitude intensity corresponding to the specified modulation frequency. The extracted test spectral signal was not affected by stray light.


Manuscript ID.  0059
Paper No.  2021-SAT-P0502-P008
Wei-Chih Shu Time-of-Flight Detection at 1550 nm for LiDAR System in Self-Driving Vehicles
Wei-Lun Wang;Wei-Chih Shu;Wan-Shao Tsai

Time-of-flight detection at eye-safe wavelength of 1550nm is demonstrated for LiDAR system in self-driving vehicles. We use a pulse laser diode as the light source, an avalanche photodiode as the signal receiver, and multiple diffused objects with different reflectivity to demonstrate the LiDAR system. Time-of-flight analysis is used to measure the distance between the source and the target. Indoor and outdoor distance up to 65m of single target is demonstrated.

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Manuscript ID.  0133
Paper No.  2021-SAT-P0502-P009
Guo-Hao Lu Exploiting autofocusing algorithm with liquid lens for AOI application
Guo-Hao Lu;Huan-Rong Lin;Chao-Feng Liu;Jing-Feng Weng;Yu-Hsin Lin;Chun-Jen Weng

In this study, the liquid lens was integrated into the AOI imaging system. Because the liquid lens can quickly adjust the focal length, we apply it to the image focal length scan, and combine the sharpness algorithm to calculate the image sharpness curve. Experimental results, this system architecture and sharpness algorithm, can find the best focus position in the imaging system.


Manuscript ID.  0282
Paper No.  2021-SAT-P0502-P010
Shu-Quan Qiu Birefringent Polymer for Ethanol Volatilization Measurement in Fiber Optic Spectrometer
Ruey-Ching Twu;Shu-Quan Qiu;Shih-Chun Hsu

In this study, we use a birefringent polymer PEN immersed in ethanol solution to monitor the volatilization phenomenon based on a polarimetric spectral interference measurement scheme. Since the refractive index of ethanol solution change as well as volatilization in contact with air, the dip wavelength shift gradually due to the condition change of interference phase. The measurements indicate a sensitivity to RI changes of 7.7×104 nm/RIU, resulting in a detection limit of about 1.3×10-5 RIU.


Manuscript ID.  0288
Paper No.  2021-SAT-P0502-P011
Shih-Chun Hsu BBO Optical Angle Sensor for Non-Contact Fluidic Concentration Measurements
Ruey-Ching Twu;Shih-Chun Hsu;Shu-Quan Qiu

A BBO optical angle sensor was demonstrated successfully for the non-contact fluidic concentration measurements in a common path heterodyne interferometer. The achievable concentration and RI measurement resolutions are 45 ppm and 7.2×10-6 RIU, respectively.


Manuscript ID.  0628
Paper No.  2021-SAT-P0502-P012
Shyh-Tsong Lin Transmission differential interference contrast microscope using liquid-crystal Savart prism as the shear device.
Ting-Yu Chien;Che-Wei Kuo;Xuan-Lun Zhang;Shyh-Tsong Lin

This paper proposes a Differential Interference Contrast Microscope (DICM), which uses a liquid crystal cell as a shearing element between the objective lens and the sample, and uses a quarter wave plate with a polarization camera to introduce the phase. Compared with the traditional DICM,The system has the advantage of not requiring mechanical action to switch the shearing direction and can complete the phase shift instantly. It is superior to previous architectures in terms of time cost, operational complexity and applicability.


Manuscript ID.  0376
Paper No.  2021-SAT-P0502-P013
Vincent Hsiao The Use of Rotary Triboelectric Nanogenerator (r-TENG) as an Efficient Energy Source to Drive Polymer Dispersed Liquid Crystal Devices
Vincent Hsiao;Hengyu Guo;Ko-Ting Cheng;Jr-Hau He;Zhong Lin Wang

We use a simple polymer dispersed liquid crystal (PDLC), consisted of 30% LC and 70% commercially available UV-curable epoxy, connected with free-standing rotary triboelectric nanogenerator (r-TENG) to evaluate the behavior of LC inside polymer matrix by synchronously recording the triboelectric voltages and currents. The experimental results revels that the applied current, not voltage, determines the performance of PDLC devices. Under the same supplied currents from r-TENG, the performance of one piece PDLC is the same as 9 pieces of series connected PDLCs.


Manuscript ID.  0671
Paper No.  2021-SAT-P0502-P014
Ching-Wei Chen Tolerance budget allocations for optical telescope manufacturing and assembly
Ching-Wei Chen;Yu-Sheng Liu;Chia-Ray Chen

This paper mainly describes the use of MTF and WFE as the evaluation function of the optical telescope during the manufacturing and assembly process to control the performance of the optical system step by step. By tolerances allocations in each stage, the tolerance margin and the success criteria is clearly understood, the critical path in the overall process could be easily shown. It is much better and confident for the project management. If every process stage could follow the budget allocation, the final performance of the overall optical system should be expected to meet the requirements.

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Manuscript ID.  0658
Paper No.  2021-SAT-P0502-P015
Hsing-Yu Wu Study of color vision inspection system
Hsing-Yu Wu;Chih-Hsuan Shih;Li-Siang Shen;Chia-Ying Tsai;Jin-Cherng Hsu

The color vision inspection system under the full-color gamut spectrum can be used for human color discrimination. This advanced design has the characteristics of quick test-time control, humanized operation design, and sensitive, accurate and robust measuring results for the degree of color blindness by using about 100 lux at white-light illuminance.

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Manuscript ID.  0570
Paper No.  2021-SAT-P0502-P016
Cheng-Fang Ho Error Removal of Testing a Concave Hyperbolic Mirror Based on Rotational Shears Interferometric Test
Cheng-Fang Ho;Zong-Ru Yu;Ching-Hsiang Kuo;Po-ming Lin;Sheng-Tsong Chang

In this case study, the nonrotationally symmetric systematic error of testing a concave hyperbolic mirror is presented. Based on the Interferometric test with rotational shears technique, the nonrotationally symmetric systematic error are analyzed and compared with both of the multi-angle averaging method and Zernike terms analysis method.

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Manuscript ID.  0295
Paper No.  2021-SAT-P0502-P017
Jyun-Wei Li A Large-Area Multipoint Fiber Sensor System Using Machine Learning
Jyun-Wei Li;Peng-Chun Peng

In this paper, a large-area multipoint sensor using machine learning (ML) for a highly reliable fiber Bragg grating (FBG) sensor system is proposed. The experimental results prove that ML can provide the best sensing path from multiple different sensing paths in the network.

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Manuscript ID.  0212
Paper No.  2021-SAT-P0502-P018
Jen-Chieh Chen The Optimal Study of Data Science Regulating Optoelectronic Products Testing Vibration Tray Operation
Chien-Chung Tsai;Jen-Chieh Chen

This paper uses 5 million original test data for comparison and analysis, uses the
random forest method in machine learning (ML) to adjust the test machine parameters and
achieves the best UPH (Units per hour), and passes the streamlined man-machine guidance
surface synchronization verification , And then use the adjustment of the optical fiber detector
to optimize the optimal setting value of the production machine parameters and the level of

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Manuscript ID.  0240
Paper No.  2021-SAT-P0502-P019
Ho-Lin Tsay Optical Surface Profilometer with An Auto-collimating Probe
Po-Ming Lin;Chun-Chieh Lien;Hui-Chun Kuo;Ming-Fu Chen;Ho-Lin Tsay

This article introduces a profiler equipped with a hexapod, a moving stage, a rotating spindle, and an autocollimating probe. This setup measures directions of points in polished surface instead of relative sag on these surface.

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Manuscript ID.  0235
Paper No.  2021-SAT-P0502-P020
Te-Wei Chiang Unwarpping phase-shifted fringe projection profilometry in metal powder bed fusion system by phase-offset approach
Te-Wei Chiang;Kuo-Kuang Jen;Yuan-Yao Lin

A phase-shifted fringe projection profilometer is developed to monitor the surface profile of the fabricated layers in a metal power bed fusion manufacturing system. Using structured light illumination with digital projector, a series of the distorted fringes projected on the samples are recorded by cameras. Distorted fringe images are decoded to obtain the phase information, unwrapped by the proposed phase-offset approach and reconstruct the surface profile proportional to the unwrapped phases. The optical system are designed and analyzed theoretically, which show the possibility to achieve surface contour imaging sub-millimeter axial precision and to realize real-time surface profile monitoring.

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Manuscript ID.  0135
Paper No.  2021-SAT-P0502-P021
Yu-Wei Lee Direct lasing of topological charge tunable vortex lasers in resonator with spiral-phase defect
Yu-Wei Lee

We combine the design of spot-defect and azimuthal symmetry breaking into a resonator to generate optical vortices. This spiral-phase defect structure is implemented by reflective spatial light modulator and lead to direct lasing of topological charge tunable vortex lasers confirming the theoretical predictions by modal decompositions.

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Optical Design

Optical Design VI
Saturday, Dec. 4, 2021  10:45-12:15
Presider: Prof. Pin Han
Room: 302e
10:45 - 11:00
Manuscript ID.  0547
Paper No.  2021-SAT-S0506-O001
SHAO-CHE SUN Use segmented simulation to reduce large amounts of data
SHAO-CHE SUN;Guo-Dung Su;Ko-Ting Cheng;Ching-An Chih

Techwiz LCD 3D is currently a mature liquid crystal display design and simulation software, which can be used for liquid crystal, TFT simulation, panel, optical. In the process of research, we often need to expand the range of simulation to check the characteristics of the liquid crystal at a location. In order to maintain the accuracy of the simulation, we often set the mesh small. However, large-scale simulation is accompanied by numerous data. Under a long simulation time, the computer cannot withstand lots of data. For improving this situation, we have proposed a method of Segmented simulation.

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11:00 - 11:15
Manuscript ID.  0416
Paper No.  2021-SAT-S0506-O002
Bao Le 24-hour lighting to Aid Sleep Patterns for Persons Living with Dementia
Bao Le;Jonathon David White

Light is not only for human vision but may also be a non-pharmacological method to improve the sleep cycle and quality life of people who have to live with dementia. Using LEDs, we have designed a 24-hour lighting timetable to simulate changes in daytime spectra for installation in long-term care and family homes.

11:15 - 11:30
Manuscript ID.  0457
Paper No.  2021-SAT-S0506-O003
MING-HONG CHANG A modification of end-pumped Nd:YVO4 crystal by a light-emitting diode with a wavelength of 810nm

Here we demonstrate an end pumped Nd:YVO4 crystal by a light emitting diode with 1.2W and wavelength of 810nm.Through commercial software ZEMAX simulation designs the coupling lens sets, which are used to couple light into the laser crystal. The power of 1064nm infrared increased with LED light intensity was observed. The maximum coupling intensity of LED was 79.09W/cm2.

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11:30 - 11:45
Manuscript ID.  0415
Paper No.  2021-SAT-S0506-O004
Po-Jui Chen Achieving over 80% External Quantum Efficiency In Organic Electroluminescence Using High-Index Substrates and Horizontal Emitters
Po-Jui Chen;Bo-Kai Wang;Wei-Kai Lee;Yu-Hsing Huang;Sheng-Wen Wen;Xuang Zeng;Fan Ni;Shaolong Gong;Chuluo Yang;Chung-Chih Wu

Organic light emitting diode (OLED) adopting high-index substrates (refractive index > 1.8-1.9) and highly horizontal-dipole ratio emitters (horizontal dipole ratio > 85%) has shown great enhancement for light extraction. Together with low index carrier transport layer and optimized transparent electrode thickness, all waveguide modes and surface plasmon modes can be suppressed and high optical coupling efficiency into substrates of ~90% can be obtained. In our experiment, combining sapphire substrate (n~1.78), recently developed high horizontal emitting dipole (87%) emitters, and external extraction lens, OLED devices having external quantum efficiency (EQE) over 80% was successfully realized.

11:45 - 12:00
Manuscript ID.  0333
Paper No.  2021-SAT-S0506-O005
Quoc-Hung Phan Mueller matrix polarimetry technique for antibody IgG rapid detection
Quoc-Hung Phan

A novel method for the rapid detection of immunoglobulin G (IgG) antibody by using the Mueller matrix polarimetry technique is proposed. The feasibility of the proposed sensor is demonstrated by measuring the IgG concentration human serum solutions over the range of 0-250 ng/ml. The results show that the circular dichroism properties increase linearly with an increasing IgG concentration over the considered range. Moreover, the proposed device has a resolution of 5-10 ng/ml and a response time of less than three minutes.