Infrared space camera static transfer function test system and test method
A technology of space camera and static transmission, applied in the field of space optics, to achieve a wide range of engineering application prospects and improve the effect of test accuracy
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specific Embodiment approach 1
[0030] Specific implementation mode 1. Combination Figure 1 to Figure 4 Describe this embodiment, an infrared space camera static transfer function test system, which is composed of a black body radiation source 1, a target assembly 2 and an infrared collimator 3 arranged in a vacuum low temperature environment simulation device 5, and all of them can be tested in a vacuum low temperature environment. down to work. Among them, the black body radiation source 1 is equipped with a low-temperature baffle that can be opened and closed at a working temperature of less than 100K, and a target assembly 2 is placed on the focal plane of the infrared collimator 3, and three types of targets are installed on the target assembly 2, which are light holes respectively. Target 2-1, low spatial frequency target 2-2 and Nyquist frequency target 2-3 are used to test the thermal radiation, object space modulation and image space modulation of collimator and space camera optical system respecti...
specific Embodiment approach 2
[0034] Specific embodiment two, combine Figure 1 to Figure 4 Describe this embodiment, this embodiment is the test method of a static transfer function test system for an infrared space camera described in the first embodiment, in the MTF test, first switch the target component to the low spatial frequency target 2-2, set The temperature of the vacuum low-temperature blackbody 1-1 makes the gray value of the image corresponding to the light hole unsaturated, and obtains the low spatial frequency target image;
[0035] Keep the temperature of the vacuum low-temperature blackbody 1-1 unchanged, switch to the Nyquist frequency target 2-3, and obtain the image of the Nyquist frequency target;
[0036] Then switch to the through-hole target 2-1, cut the low-temperature baffle 1-2 in front of the blackbody radiation source into the light path, block the low-temperature baffle 1-2 in the vacuum low-temperature blackbody 1-1, and acquire the image of the through-hole target.
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Abstract
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