Portable combined zero-setting laser large-working-distance auto-collimation device and method

Abstract

The invention belongs to the fields of precise measurement and optical engineering, and specifically relates to a portable combined zero-setting laser large-working-distance auto-collimation device and method. The device consists of a light source, a collimating mirror, a reflector, and a feedback imaging system. The method comprises the steps: enabling a reflected light beam to return to the center of the imaging plane of the feedback imaging system through adjusting the reflector, and obtaining the angle change of the surface of a measured object through employing an angle deflection measurement device on the reflector. According to the invention, the reflector is added to a conventional auto-collimation angle measurement system, so the device can solve a problem that the reflected light of the measured object cannot be measured because the reflected light deflects from the measurement system, enlarges the auto-collimation working range under the condition of the same working distance or increases the working distance under the condition of the same auto-collimation working range. In addition, the specific design of the collimating mirror, the feedback imaging system and the reflector enables the device to be small and portable, and to be high in measurement precision. The device still can carry out measurement in an unstable measurement environment, and can achieve quick measurement.

Description

technical field [0001] The invention belongs to the field of precision measurement technology and the field of optical engineering, in particular to a portable combined zeroing laser 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 hundreds of meter...

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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