Method for making 180 degree big span second grade optical axis parallelism angle mirror

Abstract

The invention discloses a manufacturing method of a 180 degrees large span second parallelism of optical axis angle mirror; the substantial contents of the method are that: surface shape requirement and parallelism precision of two end surfaces of the angle mirror supporting plate are guaranteed by common optical elements processing technique; two plane reflectors are processed by adopting commonoptical elements processing technique, and sections of the reflecting surface of the two reflectors are stuck on the two end surfaces of the angle supporting plate by optical cement mode, thus formingthe angle mirror. The manufacturing method of the angle mirror in the invention not only has comparatively simple manufacturing process and shortens the manufacturing period of the angle mirror, butalso easily guarantees the second level parallelism requirement between the emergent light axis and the incident light axis, and the angle mirror has good optical cement strength and reliable quality.

Description

technical field [0001] The invention belongs to the technical field of optical cold processing, and mainly relates to a method for manufacturing a corner mirror, in particular to a method for manufacturing a corner mirror with a large-span second-level optical axis parallelism. Background technique [0002] As we all know, in an integrated optical instrument, in order to save space and make a reasonable structural configuration, it is usually necessary to bend the optical path of the optical system, and the specific bending angle depends on the specific design of the instrument. The optical element that realizes the optical path refraction of 90° generally adopts an isosceles right-angle prism and a plane reflector placed at 45° to achieve an optical path refraction of more than 90°. The corner mirror formed on the pallet is realized. The traditional 180 ° corner mirror manufacturing method is, at first, one side rough surface of the first plane reflector (or the first pris...

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Problems solved by technology

If still adopting the traditional corner mirror manufacturing method to make this corner mirror, the following problems will be brought: (1) because the horizontal center distance between the two end faces A and B of the supporting plate 3 is relatively large, and the size of these two end faces is only 40mm× 20mm, so it is impossible to detect and control the parallelism of the two end faces A and B to achieve second-level precision during the rough grinding stage of the pallet, and it is impossible to guarantee the perpendicularity of the two end faces A and B to the three major surfaces of the pallet; ( 2) In order to ensure high-precision parallelism requirements, during the gluing process, the two end faces of the supporting plate 3 must be finely ground, and at the same time, the horizontal and vertical positions of the two end faces A, B and the large surface of the supporting plate 3 must be modified. The deviation of the direction, and this deviation is not easy to control, brings difficulties to the actual operation, and is not conducive to the control of the surface defects of the first and second plane mirrors 1 and 2; (3) the first and second plane mirrors 1, 2 and supporting plate 3 are bonded with optical epoxy resin, which not only requires more than 30 hours of curing time, but also cannot locally heat the corner mirror when debugging the parallelism of the optical axis, resulting in a production cycle of the corner mirror In addition, the corner mirrors that do not meet the requirements of parallelism need to be disassembled, and the removal of the glue is prone to the problem of scrapping the optical components

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