Adjustment method for parallelism of linear guide rail in continuous zooming thermal imaging instrument

Abstract

The invention provides an adjustment method for the parallelism of a linear guide rail in a continuous zooming thermal imaging instrument, which is characterized in that an axis of a fixed mirror mounting datum hole is converted into a cross-shaped central axis of an internal focusing collimating telescope optical axis by using an internal focusing collimating telescope and by means of a fixed mirror cross-shaped reticle, a moving mirror cross-shaped reticle and a two-dimensional translation stage, the direction of the linear guide rail is converted into a central axis of the moving mirror mounting hole at the same time by means of a moving mirror mounting hole in a moving mirror frame on a linear guide rail sliding block, observation is performed by using the internal focusing collimating telescope by means of the moving mirror cross-shaped reticle in which the outer diameter of the fixed mirror cross-shaped reticle and the moving mirror mounting hole are precisely matched, and a collimated image and a reticle image of the moving mirror cross-shaped reticle in the moving mirror frame within the full-stroke moving range are enabled to be overlapped with a reticle in the internal focusing collimating telescope through adjusting a pitch angle, an azimuth angle and translation of the linear guide rail, so that adjustment for the parallelism of the linear guide rail relative to the axis of the fixed mirror datum hole. According to the method provided by the invention, the parallelism of the linear guide rail relative to the axis of the fixed mirror datum hole can be less than 0.02mm.

Description

technical field [0001] The invention belongs to the technical field of optical-mechanical assembly and adjustment, and relates to an installation and adjustment method for the parallelism of a linear guide rail relative to the axis of a lens installation hole in a continuous zoom thermal imager. Background technique [0002] The support and guide mechanism used by the moving lens in the traditional infrared continuous zoom thermal imager is generally realized by the cooperation of the inner and outer cylindrical surfaces of the lens barrel or the cooperation of the shaft sleeve and the polished rod, but this puts forward high requirements for the processing and matching precision of the parts. With the development of technology, due to the advantages of simple structure, small dynamic friction coefficient, high guiding precision, and good precision retention, rolling linear guides have gradually begun to be used in aerospace optical instruments in recent years, but how to rea...

AI Technical Summary

Problems solved by technology

With the development of technology, due to the advantages of simple structure, small dynamic friction coefficient, high guiding precision, and good precision retention, rolling linear guides have gradually begun to be used in aerospace optical instruments in recent years, but how to realize The method of adjusting the parallelism between the linear guide rail and the axis of the lens installation reference hole has rarely been reported.

When the parallelism between the linear guide rail and the axis of the lens installation reference hole does not meet the requirements of the design index, it will cause problems such as poor image quality and substandard optical axis consistency.

Images