Portable combined zero-adjustment high dynamic precision large working distance autocollimation device and method

Abstract

The invention belongs to the technical field of precision measurement and the field of optical engineering and specifically relates to a portable combined zeroing high-dynamic-accuracy large-working-distance self-collimation device and method. The device comprises a light source, a collimating lens, a reflector and a feedback imaging system. The method comprises the following steps: adjusting the reflector, causing the reflected light beam return to the center of the image plane of the feedback imaging system, and then utilizing an angular deflecting measuring device on the reflector to acquire the angle change on the surface of the measured object. According to the invention, the reflector is added to the traditional self-collimation angular measuring system, the problem of being unable to measure resulted from the reflected light of the measured object deviating from the measurement system can be avoided, the self-collimation work scope can be increased under same working distance or the working distance can be increased under same work scope; besides, due to the specific design for the collimation lens, the feedback imaging system, and the reflector, the device provided by the invention is smart, portable and high in measurement precision, can be used for monitoring the whole assembling process of the measured object and has the technical advantage of quick measurement.

Description

technical field [0001] The invention belongs to the technical field of precision measurement and the field of optical engineering, in particular to a portable combined zeroing high dynamic precision large working distance self-collimation device and method. Background technique [0002] In the fields of precision measurement technology, optical engineering, cutting-edge scientific experiments and high-end precision equipment manufacturing, there is an urgent need for large working range and high-precision laser self-collimation technology at a large working distance. It supports the development of technology and equipment in the above fields. [0003] In the field of precision measurement technology and instruments, the combination of laser autocollimator and circular grating can measure any line angle; the combination of laser autocollimation technology and polyhedral prism can measure surface angle and circular indexing; the maximum working distance From a few meters to h...

AI Technical Summary

Problems solved by technology

[0008] First, the range of the angle between the normal of the mirror surface of the measured object 5 and the optical axis of the laser autocollimator should not be too large, otherwise the reflected beam will deviate from the entrance pupil of the laser autocollimator optical system, resulting in failure to achieve self-collimation Straight and micro angle measurement;

[0009] Second, the distance between the mirror surface of the measured object 5 and the entrance pupil of the laser autocollimator should not be too far away, otherwise as long as the reflected optical axis deviates from the optical axis of the autocollimator by a small angle, the reflected beam will deviate from the optical system of the laser autocollimator The entrance pupil, which leads to the inability to achieve self-collimation and micro-angle measurement

[0010] The above two problems limit the use of traditional autocollimation instruments to small angles and small working distances.

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