Acta Photonica Sinica, Vol. 49, Issue 7, 724001 (2020)
Laser Speckle Suppression Based on Tunable Metasurface
CHENG Jin1, ZHOU Shun1, SUN Xue-ping1, PU Xin-xin1, SUN Qi-liang2, XU Ying-shun3, and LIU Wei-guo1
- 1School of Photoelectric Engineering, Xi''an Technological University, Xi''an 710021, China
- 2Wuxi V-Sensor Technology Co., Ltd, Wuxi, Jiangsu 214101, China
- 3School of Biomedical Engineering and Technology, Tianjin Medical University, Tianjin 300072, China
In order to suppress laser speckle, a metasurface structure with high transmittance and random phase function is designed, which utilizing the basic idea of time-averaged suppression speckle theory. Then integrated with MEMS technology, the design and manufacture of micro-rotation stages is realized, and to achieve a ultra-small speckle suppression device. The experimental results show that the laser speckle contrast can be reduced to 2.63%, which meets the needs of laser projection. This novel laser speckle suppression device is simple in use, high in energy utilization rate, low in cost, and easy to mass-produce.
Please Enter Your Email: