Reticle plate fixed device having no influence on focal plane position of collimator

Abstract

The invention provides a reticle plate fixed device having no influence on a focal plane position of a collimator. By the reticle plate fixed device, the problem that the measurement accuracy requirement of space satellite-borne equipment cannot be met by an existing reticle plate fixed mode is solved. The device comprises a first annular sleeve, an annular trimming gasket, a miniature annular magnet, a sunk screw, an installation seat and a reticle plate press ring, wherein the first annular sleeve is in a step shape, a plurality of threaded holes are formed in an end surface of a large end of the first annular sleeve along a circumferential direction, a plurality of through holes are formed in the annular trimming gasket in a circumferential direction, the sunk screw sequentially penetrates through the miniature annular magnet and the through holes and then is connected with the threaded holes, the installation seat is in a step shape, an external diameter of a small end of the installation seat is adaptive to the inner diameter of the first annular sleeve, a threaded hole is formed in the installation seat, the reticle plate press ring is arranged in the threaded hole, a reticleplate is fixed between the installation seat and the reticle plate press ring, the installation seat employs a ferromagnetic material, and a large end of the installation seat is attracted with the miniature annular magnet when the small end of the installation seat is arranged in the first annular sleeve.

Description

technical field [0001] The invention belongs to the technical field of optical testing, and in particular relates to a reticle fixing device which does not affect the position of the focal plane of a collimator. Background technique [0002] The collimator is an optical instrument used in the optical laboratory to generate infinite parallel beams. Its focal plane position has been strictly calibrated and equipped with different reticles. It can be widely used in optical parameters such as geometric parameters of optical instruments and imaging quality. It is an important tool in optical assembly and inspection. [0003] The focal plane position of the collimator generally has a position adjustment structure. During the calibration process, the focal plane position is determined through strict measurement. After being adjusted in place by the position adjustment structure, it is fixed. In use, it is measured by replacing different reticles. different parameters. [0004] Wi...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problem that the existing reticle fixing method cannot meet the measurement accuracy requirements of space satellite-borne equipment, the present invention provides a reticle fixing device that has no influence on the focal plane position of the collimator, which can be realized in It is convenient and fast to replace the reticle during the measurement process, and the positioning is accurate, and the structure of the focal plane will not be subject to a large force, preventing the position of the focal plane from changing due to the replacement of the reticle

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