Detection method for capture capability of photoelectric tracking equipment to target with low contrast

Abstract

The invention relates to a detection method for the capture capability of photoelectric tracking equipment to a target with low contrast. The method comprises the following steps of: mounting a target on a focal plane of a collimation objective between a target integrating sphere and a background integrating sphere; adjusting the light flux of an external light source entering the background integrating sphere until a radiance value measured by a spectrum radiance meter reaches set background brightness; adjusting the light flux of the external light source entering the target integrating sphere until a radiance value measured by a spectrum radiance meter reaches set target brightness; and aligning an optical system of the photoelectric tracking equipment to be detected with the collimation objective and continuously changing target and background contrast until a target with the minimum contrast can be captured by the photoelectric tracking equipment. By the invention, the radiance of the target integrating sphere can be continuously changed to obtain different kinds of target and background contrast. The invention provides an optical measurable accurate reference for detecting the capture capability of the photoelectric tracking equipment to a target with low contrast.

Description

technical field [0001] The invention relates to a detection method of an optical instrument, in particular to a detection method of the ability of a photoelectric tracking measurement device to capture a low-contrast target. Background technique [0002] Photoelectric tracking and measuring equipment is used to realize automatic tracking and position measurement of a certain moving target (such as a target flying in the sky and a target traveling on the ground). The instrument performance such as the tracking distance and the stability of the tracking process that the photoelectric tracking measurement equipment can achieve is related to the contrast of the tracked target. When the target contrast is very low, the photoelectric tracking measurement equipment will not be able to detect the existence of the target, or can detect the target However, the ability to capture is reduced, which affects the stability of tracking. Therefore, the ability of photoelectric tracking meas...

AI Technical Summary

Problems solved by technology

[0005] This device is used to test the minimum resolvable contrast of a small visual optical lens. The illumination brightness of the two integrating spheres is very low, and the maximum brightness can only reach 200cd / m 2 , while testing photoelectric equipment, it is necessary to simulate the maximum brightness of the sky (about 8000cd / m 2 ), so the principle of this device cannot meet our needs

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