Large-field-of-view low light camera resolution testing device and testing method

Abstract

The invention relates to a large-field-of-view low light camera resolution testing device and testing method. A reflection type resolution target plate is positioned at the middle part of the front end of a white diffuse reflection curtain; a long-focus collimator lens is positioned between a tested camera and the reflection type resolution target plate; a position of an area light source projection system enables the center of a light source emergent region and the center of the reflection type resolution target plate to be coincided; and an irradiation region is not smaller than the white diffuse reflection curtain. Emergent light intensity of the area light source projection system 5 is continuous and adjustable, the reflection type resolution testing target plate 8 can be replaced, anda collimator lens assembly shoots the resolution target plate to carry out resolution testing of a large-field-of-view low light camera under different illuminations and in different contrast ratios.The device is simple to implement and convenient to operate and can implement testing on resolutions of the large-field-of-view low light camera under different illuminations and in different contrast ratios.

Description

technical field [0001] The invention belongs to the technical field of photoelectric detection, relates to a large field of view low-light camera resolution test device and a test method, and is a large field of view for measuring the resolution of a large field of view low-light camera for an airborne pilot night vision system Low-light camera resolution test device. Background technique [0002] The pilot night vision system is widely used in platforms such as fighter jets, helicopters, bombers and unmanned aerial vehicles. The ability to perform combat missions, thereby improving the night vision and night combat capabilities of combat aircraft. As an important equipment for combat aircraft to achieve night vision and night combat, the pilot night vision system uses the physical characteristics of the target and the background's own reflection (twilight) or radiation (infrared) to realize the detection of the target by automatically or manually judging the target , reco...

AI Technical Summary

Problems solved by technology

The traditional test device uses a weak-light integrating sphere to irradiate the target area alone. During the resolution test of the large-field low-light camera, the central field of view of the picture taken during the resolution test is bright, and the surrounding area of ​​the target plate is dark. Saturation makes it impossible to achieve accurate resolution testing, which affects the measurement and evaluation of detection performance indicators of large-field low-light cameras. Therefore, this paper proposes a large-field low-light camera resolution test device to solve such problems.

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