Method for installing and adjusting optical axis of despinning part of Pechan prism

Abstract

The invention relates to a method for installing and adjusting the optical axis of a despinning part of a Pechan prism. Two coaxial parallel optical paths and a converging optical path are built by using a photoelectric autocollimator, an internal focusing optical tube and a right-angle beam splitting prism. Firstly, the despinning part is put into the built optical paths, the cross center of a reticle is adjusted to coincide with a despinning axial system, then the Pechan prism is installed, and a Pechan prism axial system and the despinning axial system are overlapped by adjusting the translation and inclination of the Pechan prism. The method for installing and adjusting the optical axis of the despinning part of the Pechan prism can simultaneously monitor the position relation of the optical axis of the Pechan prism relative to the despinning axial system in the parallel optical paths and the converging optical path, avoids blindness in the debugging process, can greatly save debugging time, and can be widely used for installing and adjusting the coincidence of the optical axis of the Pechan prism and the despinning axial system in the despinning part of the Pechan prism.

Description

technical field [0001] The invention belongs to the field of optical machine assembly and adjustment, and relates to an assembly method for the optical axis of a derotation component of a Beham prism. Background technique [0002] The Bechan prism is a composite prism consisting of a half-pentagonal prism and a Schmidt prism. Beuchan prisms are mainly used for image derotation in optical systems. The rotation of the image caused by Beuchhan prisms is equal to twice the mechanical rotation angle of the prism. It can be used not only for parallel optical paths, but also for non-parallel optical paths. A certain type of photoelectric detection equipment uses a Biechan prism to eliminate image rotation. It is required that the parallelism between the outgoing light and the incident light after the parallel light passes through the Biechan prism is better than 20", and at the same time, in the converging optical path, the image point after the beam passes through the Biechan pris...

AI Technical Summary

Problems solved by technology

[0003] The patent "Biechan Prism Optical Axis Debugging Method" discloses a method of using the inner focusing telescope and the contrast reticle to adjust the Behan prism optical axis. This method judges the inner focusing light tube by observing the eyepiece The position of the reticle image relative to the contrast reticle increases the workload and at the same time causes human eye errors; it passes through the inner focusing telescope when the optical axis of the Behan prism is parallel to the mechanical rotation axis of the Behan prism assembly. Observe the self-collimation image reflected after the reticle line of the inner focusing telescope passes through the incident surface of the Beham prism to ensure that the optical axis of the Beham prism is parallel to the mechanical rotation axis of the Beham prism assembly, ignoring the Secondly, when debugging the optical axis of the Bechan prism and the mechanical rotation axis of the Bechan prism assembly, it is only debugged in the converging optical path, ignoring the prism angle tilt caused by debugging the position of the Beham prism, which cannot be monitored in real time In the parallel optical path, the deviation of the mechanical axis of rotation of the Beham prism relative to the Beham prism assembly brings great difficulty to debugging

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