Penetrating scattering medium long-distance projection device and method based on spatial light modulator

• Main Authors: WU XIANYU, CHEN YANQING, ZHAN HAOMIN, HUANG FENG, LIU YU, PENG FEI
• Format: Patent
• Language: Chinese; English
• Published: 07.01.2022
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; HOLOGRAPHY; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

The invention provides a scattering medium penetrating long-distance projection device and method based on a spatial light modulator. Projection light can penetrate through a scattering medium and form an image on a projection screen in a high-quality mode, and a light source, the spatial light modulator and a projection shadow head are sequentially arranged on a projection light path of the device; the projection light path is connected with a control device; and the control device is connected with a high-speed imaging detector capable of acquiring imaging images from a projection screen, the current projection effect is evaluated through the imaging images acquired by the high-speed imaging detector, and the projection light path is adjusted to optimize the imaging effect. The device has an automatic feedback device and function, can automatically adjust the output power of the laser light sources with different wavelengths and the modulation state of the spatial light modulator according to the projection