Abstract: The low-light level digital sighting telescope encounters strong stray light interference, which causes imaging overexposure and submerges useful information in the image. To address this issue, a set of strong stray light suppression technology solutions is proposed. First, absorbance flannelette is pasted to the inner surface of the objective lens, and then several algorithms such as cumulative integration of adjacent images, histogram statistics, and wide dynamic gray enhancement are used in software image processing to suppress strong stray light. In outdoor environments with night sky illumination below 1 伊10 -3 lx, the experiment is conducted with added strong stray light interference. The results show that the technical solution can effectively suppress strong stray light and enhance image details, thereby improving image quality. The software runs based on FPGA(Field Programmable Gate Array), with a maximum processing time of 2 ms, meeting the real-time requirements of the system.

Key words: digital sighting telescope')">

digital sighting telescope, strong stray light, interference, suppression, absorbance flannelette, histogram, dynamic gray enhancement