Control and optimization of the stray light in laser projectors

Shuihai Peng; Dayong Zhang; Genjie Yang; Junsheng Yu

doi:10.1117/12.2605146

13 December 2021 Control and optimization of the stray light in laser projectors

Shuihai Peng, Dayong Zhang, Genjie Yang, Junsheng Yu

Proceedings Volume 12070, 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirror and Telescopes; 120700L (2021) https://doi.org/10.1117/12.2605146
Event: Tenth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2021), 2021, Chengdu, China

Abstract

Laser projectors are more and more widely used because of their large screen, and high brightness. However, the stray light outside the screen affects the user's viewing effect dramatically. In some cases, it looks like there's a halo on the top, or loos like some light outside the picture in the black. Since the stray light comes from the reflection of mechanical structural parts in the lens, and some stray light is launched by the light on digital micromirror device (DMD) off state in the illumination system, how to carry out theoretical analysis effectively is a difficult problem. On the other hand, how to trace stray light back to the source after it hits the screen and reduce it is also a challenge. Herein, some effective theoretic analysis methods and practical analysis methods are put forward, and effective countermeasures are given. Through experiments, the stray light situation is effectively improved.

Citation Download Citation

Shuihai Peng, Dayong Zhang, Genjie Yang, and Junsheng Yu "Control and optimization of the stray light in laser projectors", Proc. SPIE 12070, 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirror and Telescopes, 120700L (13 December 2021); https://doi.org/10.1117/12.2605146

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