Contrast analysis for DMD-based IR scene projector

High contrast ratio optimized total internal reflection prism for compact medium-wave IR target simulation system

“…It can be seen from the experimental results that the contrast ratio of the telecentric structure with the OTIR prism is improved compared with other structures of the MWIR target simulation system. 9 , 10 Figure 12 shows the simulated images of DMD in full-on and full-off state at 700 K and the output images of the simulated system with black and white grid input. The test results show that the optical system designed in this study can fully meet the requirements of MWIR target detection systems.…”

“…For example, Dupuis et al. 9 developed a DMD infrared scene projector for an infrared tracking system, measured the limiting factors of contrast ratio in the infrared target simulation system, and generated a new concept based on structured illumination of the projector DMD where the structure is dynamically provided by a source-conditioning DMD operating in binary mode. A contrast ratio of 250:1 is reached in the spectral range of 3–5 μm bands and the temperature of 785 K. Beasley et al.…”