Session Index

S5. Optical Design, Testing and Engineering

Optical Design, Testing and Engineering I
Friday, Dec. 2, 2022  13:00-15:00
Presider: Chuan-Chung Chang、Guo-Dung Su
Room: 2F A201
13:00 - 13:30
Manuscript ID.  0898
Paper No.  2022-FRI-S0501-I001
Invited Speaker:
Daewook Kim
Closed-Loop Adaptive Thermoforming Process of Precision Antenna Panels
Daewook Kim, University of Arizona (USA)

Future large-scale radio telescope array observatories, such as the next-generation Very Large Array, involve extremely large collection areas of antenna. These collection areas are divided into smaller panel segments, which typically require their own uniquely shaped molds to manufacture. For these projects to be cost-effective to support the science community, efficient fabrication and flexible metrology of the many differently-shaped freeform panels are needed. This paper summarizes the development of an adaptive freeform panel molding technology that greatly improves manufacturing efficiency due to its repeatable and reusable nature

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13:30 - 13:45 Award Candidate (Paper Competition)
Manuscript ID.  0053
Paper No.  2022-FRI-S0501-O001
Jui-Tse Yang Dynamic Remote Focusing by Model-based Adaptive Optics
Jui-Tse Yang, Cheng-Jung Yang, Chia-Yuan Chang, National Cheng Kung University (Taiwan)

In optical microscopy system, dynamic remote focusing is achieved by adjusting the defocus term of Zernike polynomials. With developed model-based adaptive optics (AO), we can further compensate the aberrations in addition to remote focusing. Compared with the way by moving the objective or the sample by mechanical stages. our system can change the focus position rapidly up to about ±40 μm. The other aberrations can be estimated and corrected by the model-base AO in 2 ms. The results have shown that the heat disturbance can be compensated while maintaining the remote focusing ability.

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13:45 - 14:00 Award Candidate (Paper Competition)
Manuscript ID.  0804
Paper No.  2022-FRI-S0501-O002
Hsiao-Chiao Fang Design of vehicle forward light with non-orthogonal multi-segment reflector
Hsiao-Chiao Fang, Jing-Hsuan Peng, Shih-Kang Lin, Chi-Shou Wu, Tsung-Hsun Yang, Yeh-Wei Yu, Ching-Cherng Sun, Naitonal Central University (Taiwan)

In this paper, a non-orthogonal multi-segment reflector headlight structure is proposed to improve the longitudinal stray light caused by the horizontal gap of orthogonal multi-segment reflector headlights.

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14:00 - 14:15 Award Candidate (Paper Competition)
Manuscript ID.  0274
Paper No.  2022-FRI-S0501-O003
Zi-Wei Li Achromatic 180° linear polarization rotator realized by duel-frequency liquid crystal.
Zi-Wei Li, Li-Min Chang, Ting-Mao Feng, Tsung-Hsien Lin, National Sun-Yat Sen University (Taiwan)

We demonstrate a single-element achromatic polarization rotator based on a dual-frequency chiral liquid crystal that can achieve continuously 0° to 180° linear polarization modulation. The angle of linear polarization rotation can be modulated by applying an electric field in different strength and frequency, and it has low dispersion in the whole visible spectrum and maintains a high degree of linear polarization. To verify the mechanism, the simulation of the optical polarization modulation and the director of the liquid crystal is also presented in this this study. This design has great potential in technologies based on polarization.

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14:15 - 14:30 Award Candidate (Paper Competition)
Manuscript ID.  0121
Paper No.  2022-FRI-S0501-O004
TSUNG-TA CHAN Effects of supporting plate position of dihedral corner reflector array on floating imaging quality
TSUNG-TA CHAN, Hsien-Chi Lai, I-Chih Huang, National Taiwan University (Taiwan); Kuan-Lin Lai, Gang-Ting Zhang, Chia- Lin Wu, Chao-Ching Ho, National Taipei University of Technology (Taiwan); Jia-Han Li, National Taiwan University (Taiwan)

The ray-tracing method is used to simulate the floating image of symmetric square column array and the results show that the structure with the bottom of the supporting plate has stronger intensity of floating image and the structure with the symmetric structure can suppress the stray light more capable.

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14:30 - 14:45 Award Candidate (Paper Competition)
Manuscript ID.  0464
Paper No.  2022-FRI-S0501-O005
Hung-Wei chang Performance analysis of reflector cups based on different materials
Hung-Wei chang, Chang-Kun Zheng, Chi-Shou Wu, Shih-Kang Lin, Tsung-Hsun Yang, Yeh-Wei Yu, national central university (Taiwan)

This article discusses the influence of different materials on the reflector cup. We analyze the samples made of ABS, PMMA, and Al. The reflector cup will be curved due to thermal stress, which will lead to an increase in the brightness of the dark area of the regulations in even more severe cases, it will cause glare and fail to pass regulations. The analysis standard will determine whether the reflector cup performs well through the K-mark regulations of the bicycle lamp.

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14:45 - 15:00 Award Candidate (Paper Competition)
Manuscript ID.  0604
Paper No.  2022-FRI-S0501-O006
Arvind Mukundan Detection of Particulate Matter 2.5 by Hyperspectral Imaging Engineering
Arvind Mukundan, Yu Ming Tsao, Hsiang Wang Chen, National Chung Cheng University (Taiwan)

Airborne particles (PM2.5) may spread through the atmosphere and enter the lungs leading to serious health problems. By merging hyperspectral imaging (HSI) with deep learning, a broad-based, inexpensive approach for identifying air pollution is designed. The picture captured by the drone camera is enhanced by modeling the visible-light HSI technology. In order to identify the visual characteristics of air pollution, 3D Convolutional Neural Network Auto Encoder and principal components analysis (PCA) are combined with VGG-16 (Visual Geometry Group). The images are categorized as good, moderate, and severe. According to the findings, the PCA +VGG-16 has the best average classification accuracy.

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