In response to the existing test requirements for airborne optoelectronic products, a long-wavelength band (7.5μm ~ 12.0μm) dynamic dual-target simulator was developed. Compared with previous dynamic scene projection equipment. The dynamic dual target simulator realizes the simulation of moving targets by moving target plates of different shapes and sizes at the rear focal plane of the collimating optical system. The two targets are respectively located on the conjugate focal plane of the collimating optical system, and the coupling of the two targets is realized through the beam combiner. The beam combiner can respectively transmit and reflect two infrared targets, so that the two infrared target beams can be efficiently combined into one infrared beam, while ensuring that no ghost images are generated.
In the infrared detection sensitivity test of optoelectronic products, the black body mostly adopts a single black body structure, and the ambient temperature is obtained by the temperature sensor of the black body close to the aperture aperture, not the aperture aperture to simulate the background temperature. Under the condition of large temperature difference, the black body irradiates the back of the aperture aperture for a long time, which will cause the surface temperature of the aperture aperture to rise and introduce large errors. The infrared detection sensitivity test system based on double black body adopts target black body and background black body to achieve accurate simulation of target and background temperature respectively. The target black body is transmitted through the aperture aperture to complete the target radiation simulation, and the background black body is reflected through the aperture aperture to complete the background radiation simulation. The designed infrared detection sensitivity test system has an optical aperture of Θ500mm, a focal length of 4000mm, a temperature adjustment accuracy of 0.01°C, a field of view of 2°, and an exit radiation uniformity better than 90%. It adopts environmental adaptation design to ensure that it can work under a wide temperature range of -55° ~ 70°, which effectively expands the test range of infrared detection sensitivity testing.
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