A quantum correlation autocollimator and angle measurement method

Abstract

A quantum correlation autocollimator and angle measurement method, using a coded light field realized by stepping motor and pulse modulation control, using an industrial camera and a zoom lens to shoot a series of magnified or reduced ω-fold images of the light field, and the images are in time sequence Stored in the storage unit for use. Use the pinhole diaphragm and single-pixel photodetector to replace the part of the classic autocollimator array camera, and correlate the collected photodetection signal with a series of images taken by the industrial camera, and the calculation result will get the imaging position of the pinhole diaphragm coordinate. By rotating the mirror and repeating the measurement, the coordinates of the imaging position of the two pinhole diaphragms can be subtracted, and the rotation angle information can be obtained according to the classic autocollimator theory, and the angle measurement can be completed. The invention overcomes the disadvantages of the existing classic autocollimator, such as large volume, mutual restriction between angle measurement range and angle measurement accuracy, and can solve the problems of miniaturization, large angle measurement range and high angle measurement accuracy of the autocollimator.

Description

technical field [0001] The invention relates to a quantum correlation autocollimator and an angle measurement method, belonging to the field of measurement. Background technique [0002] Classical autocollimator products generally use a line array or area array industrial camera and an imaging lens group to measure the rotation angle of the mirror, so as to achieve the measurement and calibration of the flatness or collimation of the device. At present, the miniaturization and portability of classical autocollimators are mainly limited by their basic principles. On the one hand, the larger the focal length f of the lens group, the higher the angle measurement accuracy, but the corresponding maximum angle measurement range becomes smaller. On the other hand, the larger the focal length f of the lens group requires the larger the volume of the autocollimator. Therefore, the angle measurement accuracy, angle measurement range and design volume of the classical autocollimator ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is: to overcome the disadvantages of the existing classical autocollimator, such as the large volume, the mutual restriction between the angle measurement range and the angle measurement accuracy, and propose a quantum correlation autocollimator and angle measurement method, which solves the problem of the automatic Problems of collimator miniaturization, large angle measurement range and high angle measurement accuracy

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