Large-diameter stray light measuring device and testing method

Abstract

The invention relates to a large-diameter stray light measuring device and a testing method. The large-diameter stray light measuring device comprises a target simulator, a spherical collimator tube, a detection system and a data acquisition and processing system. The target simulator is disposed on an incident path of the spherical collimator tube. An optical system to be detected is disposed on an emergent path of the spherical collimator tube. The detection system is disposed on an image surface of the optical system to be detected. The detection system is connected with the data acquisition and processing system. The large-diameter stray light measuring device and the testing method can be used to effectively assess stray light inhibiting ability of the optical system structure.

Description

technical field [0001] The invention belongs to the field of optical detection, and relates to a large-aperture stray light testing device and a testing method, in particular to a large-aperture stray light coefficient mainly used in the assessment of optical system performance of various optical cameras before optical-mechanical docking test equipment and test methods. Background technique [0002] In recent years, with the development of high-sensitivity, low-detection-threshold detectors, higher requirements have been placed on the suppression of stray light in optical systems, which requires higher precision in stray light measurement systems. [0003] When the optical system is imaging, in addition to imaging (or non-imaging) according to the normal optical path on the image plane, there are still some non-imaging rays falling on the image plane. These harmful lights that do not participate in imaging are called stray light. Stray light has a great impact on the image ...

AI Technical Summary

Problems solved by technology

[0008] In addition, the target simulators of previous stray light measurement devices all use "horn plugs" as the extinction system to provide high-contrast black spot targets, and their extinction efficiency is 1000:1; for the measurement of high-precision stray light coefficient, 1000 If the target contrast ratio is :1, the extinction ability is too poor, which will affect the final stray light measurement accuracy (often, the stray light measurement result is too large due to the reason that the black spot is not black)

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