Session Index

S5. Optical Design, Testing and Engineering

Optical Design, Testing and Engineering IV
Saturday, Dec. 3, 2022  13:00-15:15
Presider: Cheng-Mu Tsai、Bo-Hao Peng
Room: 2F A201
13:00 - 13:15
Manuscript ID.  0100
Paper No.  2022-SAT-S0504-O001
Cheng-Yu Wu Deformable Mirror with Tip-tilt Compensation for Remote Focusing
Cheng-Yu Wu, Jui-Tse Yang, Chia-Yuan Chang, National Cheng Kung University (Taiwan)

Instead of moving the mechanical stage for axial scanning, the wavefront of the laser beam is modulated to effectively move the laser focus. In this paper, a deformable mirror (DM) with tip-tilt compensation is placed at angle of 45 degree with the optical axis so that the reflected laser power efficiency can be maximized due to no beam splitter is required. We have shown the defocus can be successfully performed with the combination of Zernike polynomials even if the DM is not orthogonal to the optical axis. The results are confirmed with home-made Shack-Hartmann wavefront sensor (SHWS).

  Preview abstract
13:15 - 13:30
Manuscript ID.  0742
Paper No.  2022-SAT-S0504-O002
Dun-Ren Liu Path Following of Tracked Vehicle Based on Model Predictive Controller with Identified Dynamic Model
Chun-Ting Sung, Dun-Ren Liu, Chia-Wei Hsu, Wen-Chuan Tseng, College of Photonics (Taiwan); Meng-Hui Hsu, Department of Mechanical Engineering (Taiwan); Shean-Jen Chen, College of Photonics (Taiwan)

A data-driven system identification is implemented to estimate the dynamic model of a tracked vehicle in farm as a state-space linear model for model predictive control (MPC). Compared with conventional MPC with a kinematic model, the computation time of MPC with the identified linear model is saved more than 2/3, and the tracked vehicle with this control approach has achieved superior S-curve and L-shape path following.

  Preview abstract
13:30 - 13:45
Manuscript ID.  0179
Paper No.  2022-SAT-S0504-O003
Jo-Hsiang Chen Study of High Polarized Nanostructure Light-Emitting Diode
Jo-Hsiang Chen, Yu-Ming Huang, Tsung-Sheng Kao, Hao-Chung Kuo, Electro-Optical Engineering,National Yang Ming Chiao Tung University (Taiwan)

In this study, we investigate the characteristic difference between the two different configurations of the three-dimensional shell-core nanorod LED. We achieve a degree of polarization of 0.545 for tip-free core-shell nanorod LED and 0.188 for tip core-shell nanorod LED by combining the three dimensional (3D) structure LED with photonic crystal. These 3D LEDs may pave the way for future novel optoelectronic components.

  Preview abstract
13:45 - 14:00
Manuscript ID.  0061
Paper No.  2022-SAT-S0504-O004
Shao-Wei Huang Real-time Adaptive Ultrashort Pulse Compressor for Multiphoton Microscopy
Shao-Wei Huang, Shu-Yu Chang, Jui-Chi Chang, Chia-Yuan Chang, National Cheng Kung University (Taiwan)

The multiphoton excited fluorescence microscopy adopts ultrashort pulse laser together with a high numerical aperture (NA) objective to induce nonlinear optical effects. But the laser pulse pass through many dispersive elements making pulse width wider, so we have developed a laser pulse compressor with a deformable mirror (DM) to compensate the optical dispersion. The FROG (frequency-resolved optical gating) is used to obtain a spectrogram and DOES (direct optical-dispersion estimation by spectrogram) algorithm would estimate the GDD (group-delay dispersion) in real time. The proposed adaptive ultrashort pulse compressor finally is integrated with home-mode two-photon microscope to improve its fluorescence efficiency.

  Preview abstract
14:00 - 14:15
Manuscript ID.  0352
Paper No.  2022-SAT-S0504-O005
Jui-Fu Tang Novel approach for high-resolution, ultra-smooth photocured DLP printing technology
Jui-Fu Tang, Kuan-Wu Lin, Tsung-Hsien Lin, Wei-Chun Lin, National Sun Yat-sen University (Taiwan)

Recently, DLP 3D printing has advantages of high resolutions, low cost, and easy operation. However, this technology still exists several technical difficulties that need to be solved. Due to the structure of the LCD, the morphology of the printed sample reveals pixel texture defect under SEM image, which leads to surface irregularity. This research has redesigned the internal LCD system of the 3D printer. The newly designed LCD system has largely alleviated the texture defect caused by the dark zone between pixels. The results successfully demonstrated a nearly perfect surface printed by the modified LCD system without scarifying print resolution.

  Preview abstract
14:15 - 14:30
Manuscript ID.  0119
Paper No.  2022-SAT-S0504-O006
Chao-Hsien Chen Solving Aspheric Singlets and Cemented Doublet with Given Primary Aberrations
Chao-Hsien Chen, National Kaohsiung University of Science and Technology (Taiwan)

Algebraic algorithms are derived for solving aspheric singlets and cemented doublets. Singlets can meet the targets of focal length, spherical aberration, and central coma; cemented doublets can even meet the longitudinal chromatic aberration. Examples are demonstrated, including a DVD-rewritable pickup head singlet and a cemented doublet in a telescope system.

  Preview abstract
14:30 - 14:45
Manuscript ID.  0422
Paper No.  2022-SAT-S0504-O007
Bo-Xiang Peng Direct TIR Lens with cylindrical lens array for K-mark Low Beam Design
Bo-Xiang Peng, Chi-Shou Wu, Tsung-Hsun Yang, Yeh-Wei Yu, Ching-Cherng Sun, National Central University (Taiwan)

Using refractive optical elements to first collimate the light emitted by the LED and process the optical design. Then the cylindrical lens array can effectively spread the light pattern in the horizontal direction, homogenize the energy, and suppress the dark area more effectively, which helps shape the high-contrast light patterns.

  Preview abstract
14:45 - 15:00
Manuscript ID.  0767
Paper No.  2022-SAT-S0504-O008
Po-Hao Tseng Non-destructive inspection of compound semiconductors using optical coherence tomography
Po-Hao Tseng, Chuan-Bor Chueh, National Taiwan University (Taiwan); Hao-Chung Kuo, National Yang Ming Chao Tung University (Taiwan); Ting-Hao Chen, Hsiang-Chieh Lee, National Taiwan University (Taiwan)

Defects in compound semiconductors may decrease the performance of the devices. In this study, we demonstrated the new defect detecting method on silicon carbide (SiC) wafer using multiple swept-source optical coherence tomography (SS-OCT) systems with different central wavelengths, including 1060 nm, 1310 nm, and 1690 nm. The location, distribution, and size of defects in silicon carbide (SiC) wafer were analyzed quantitatively using the volumetric OCT datasets of the SiC sample acquired.

  Preview abstract
15:00 - 15:15
Manuscript ID.  0143
Paper No.  2022-SAT-S0504-O009
Tzu-Chen Yu The design of freeform lens with user-defined irradiance and high collimation, by using numerical method
Tzu-Chen Yu, Cheng-Mu Tsai, Graduate Institute of Precision Engineering (Taiwan)

This paper presents the design of a freeform lens that can convert a Gaussian distributed beam to a specific irradiance while maintaining high collimation. The construction of the lens is based on a numerical method derived from Snell's law.

  Preview abstract