Dual-DMD zooming infrared medium/long wave scene simulation system

Abstract

The invention provides a dual-DMD zooming infrared medium / long wave scene simulation system, which comprises an optical engine and a first mobile device used for driving the optical engine to move axially along an optical axis, wherein the optical engine comprises an infrared long wave illumination device, an infrared medium wave illumination device, a first DMD, a second DMD, a second mobile device, a projection device and a driving assembly; the infrared long wave illumination device emits infrared long wave light which irradiates onto a first DMD target surface, and the infrared medium waveillumination device emits infrared medium wave light which irradiates onto a second DMD target surface; the first DMD modulates the infrared long wave light into infrared long wave image light, and the second DMD modulates the infrared medium wave light into infrared medium wave image light; the second mobile device adjusts a relative spatial position of the first DMD and the second DMD; the projection device comprises a common aperture section and a dual-color beam combiner; and the driving assembly drives a zooming group of the common aperture section of the projection device to do axial motion. The dual-DMD zooming infrared medium / long wave scene simulation system can project an infrared dual-band simulated scene, can simulate energy distribution difference of different infrared bandson an image plane in the scene, directly illuminates the two DMD target surfaces by means of the two illumination devices, avoids interference between different optical paths by adopting a spatial three-dimensional layout, and can effectively improve system energy utilization rate and integration degree.

Description

technical field [0001] The invention relates to the field of infrared dynamic scene simulation, in particular to a double DMD zoom infrared mid / long wave scene simulation system. Background technique [0002] The infrared dual-band imaging system can obtain image information of two infrared bands at the same time, and identify the real target by comparing the energy distribution difference of different infrared bands on the detector target surface in the scene, which not only inherits the advantages of the infrared single-band imaging system, The anti-interference ability is further improved. [0003] The performance of infrared dual-band imaging system depends on the selection of two bands, among which the combination of infrared mid-wave and long-wave is the best. In order to test and evaluate it, a matching infrared mid-wave / long-wave scene simulation system is proposed. During the test, the infrared medium / long-wave scene simulation system can project the infrared long-...

AI Technical Summary

Problems solved by technology

[0005] Although the above-mentioned infrared mid-wave / long-wave scene simulation system can be used to project infrared mid-wave and long-wave simulation scenes, since a single DMD cannot separately modulate the incident light of the two infrared bands, the detection in the infrared dual-band imaging system to be checked The detector can only receive infrared long-wave image light and infrared medium-wave image light with the same energy distribution. Although the overall brightness and darkness of the two different infrared band images will be different, it is still impossible to test the anti-interference performance of the infrared dual-band imaging system, which limits the scope of use

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