Dr. Shih-Hsin Chang Profile

Dr. Shih-Hsin Chang

at Taiwan Color Optics Inc

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Author

Publications (5)

Proceedings Article | 12 September 2019 Presentation

Integration of LiDAR with laser headlight for autonomous driving (Conference Presentation)

Yung-Peng Chang, Hsin-An Chen, Shih-Hsin Chang, Zingway Pei, Chun-Nien Liu, Pin Han, Wood-Hi Cheng

Proceedings Volume 11125, 111250H (2019) https://doi.org/10.1117/12.2526390

KEYWORDS: LIDAR, Headlamps, Control systems, Radar, Ultrasonics, Environmental sensing, Laser development, Integrated optics, Optical imaging, Spectral resolution

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Lidar, radar, optical imaging and ultrasonic are important environmental sensing technologies in the field of autonomous driving. Among them, the radar can perform long-distance sensing, however it is limited by the resolution and cannot distinguish objects. Optical images have clear object resolving power, but hardly to get distance information. Ultrasonic only detect objects that are in very short distances. Therefore, it is necessary to have a technique that can clearly distinguish the objects and get the object information such as speed and distance at medium-range (100-m) for autonomous driving scheme entering level 4 and level 5. The existing light technology in the autonomous driving is to place the Lidar module on the roof of a car and perform environment sensing in a rotating manner. Such technology has low sensing capability and is not conform to the development direction of the vehicle industry that not fulfill the demand of autonomous car. In contrast to Lidar module on the roof, placing the Lidar on the front of the car has many advantages, such as easy to collect dust, suffer water corrosion and difficult to set up the electrical system. Integrating the Lidar with headlight system is a feasible direction to solve the aforementioned problems. In this study, we will develop laser headlights system with Lidar module by integrating the optical system of Lidar into headlight a unit, in which the smart laser headlight was achieved by feedback control orders system. The laser headlight will focus on the development of smart headlights with laser as the light source. With the feedback of the system, it can control the car's light field, avoid high-reflection areas at night. The integrated Lidar module will develop a quasi-static optical scanning system with a wavelength of 1550 nm and embed it in the optical path of the laser headlight. By wavelength differences, the optical path of Lidar does not interfere with headlight and high quality optical data could be obtained. Despite adapting 905 nm as optical wavelength in the current technology, the 1550 nm wavelength selected by this study meets the safety regulations and will not cause damage to the human eye at night or during the day. In this study, we will develop a Lidar module attached to a 10W laser headlight for autonomous driving. The simulation and optical performance of integration of Lidar module with laser headlight will be presented.

Proceedings Article | 4 March 2019 Presentation

Laser-excited single-crystal phosphor light module for high-power applications

Y. P. Chang, Alan Wang, Kirk Huang, Mark Chang, Lion Hsu, Andy Chen, Kenneth Li

Proceedings Volume 10940, 1094011 (2019) https://doi.org/10.1117/12.2506564

KEYWORDS: Crystals, Laser crystals, High power lasers, Laser applications, Laser development, Projection systems, Lamps, Semiconductor lasers, Light sources, Laser systems engineering

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Proceedings Article | 4 March 2019 Presentation

4-LED and 5-LED RGB light module for projection and entertainment applications

Yung-Peng Chang, Alan Wang, Kirk Huang, Mark Chang, Lion Hsu, Andy Chen, Kenneth Li

Proceedings Volume 10940, 109401F (2019) https://doi.org/10.1117/12.2507365

KEYWORDS: Light emitting diodes, Laser applications, RGB color model, Projection systems, Lamps, Blue light emitting diodes, Laser development, Green light emitting diodes, Computer simulations, Halogens

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Proceedings Article | 4 March 2019 Presentation

Intelligent automotive headlight using laser-excited glass and single crystal phosphor

Yung-Peng Chang, Alan Wang, Kirk Huang, Shih-Hsin Chang, Lion Hsu, Andy Chen, Kenneth Li

Proceedings Volume 10940, 109400R (2019) https://doi.org/10.1117/12.2507361

KEYWORDS: Headlamps, Glasses, Crystals, Laser crystals, Laser glasses, Laser development, Semiconductor lasers, Imaging systems, Halogens, Xenon

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Proceedings Article | 17 September 2018 Presentation

A novel laser headlight module (Conference Presentation)

Yung-Peng Chang, Jin-Kai Chang, Shih-Hsin Chang, Hsin-An Chen, Chun-Nien Liu, Han Pin, Wood-Hi Cheng

Proceedings Volume 10745, 107450Q (2018) https://doi.org/10.1117/12.2318918

KEYWORDS: Headlamps, Glasses, High power lasers, Silicon, Semiconductor lasers, Reliability, Aluminum

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