Cassegrain primary mirror precision machining method and auxiliary fixture thereof

A precision machining and fixture technology, applied in the field of Cassegrain primary mirror precision machining method and its supporting fixtures, can solve the problem of insufficient mirror polishing accuracy, and achieve the effect of preventing damage

Inactive Publication Date: 2017-08-18
SHANGHAI MODERN ADVANCED ULTRA PRECISION MFG CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the invention is to overcome the deficiencies in the prior art and so

Method used

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  • Cassegrain primary mirror precision machining method and auxiliary fixture thereof
  • Cassegrain primary mirror precision machining method and auxiliary fixture thereof

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] according to figure 1 A Cassegrain primary mirror precision machining method is shown, using a seven-axis polishing machine to polish the lens, and the process steps of the processing method are:

[0037] S1 Fix the rough-processed lens on the polishing jig, and fix the polishing jig on the working table of the seven-axis polishing machine tool;

[0038] S2 Use the dial indicator to rotate the center position of the lens, and locate the starting point of the polishing program of the seven-axis polishing machine through this center position;

[0039] S3 installs the polyurethane microporous plastic polishing mold airbag polishing head on the seven-axis polishing machine tool, and controls the seven-axis polishing machine tool through the polishing program to make the polishing head grind the mirror surface; the mold layer thickness of th...

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Abstract

The invention relates to a cassegrain primary mirror precision machining method and an auxiliary fixture thereof. The cassegrain primary mirror precision machining method comprises the following steps: after being clamped and fixed on a seven-axis polishing machine tool, a lens is polished by a polishing head having a micropore structure according to specified parameters. According to the cassegrain primary mirror precision machining method and the auxiliary fixture thereof, the precision of the cassegrain primary mirror surface profile after mechanical polishing can reach an industry-leading value, namely within one wavelength or even one fifth wavelength, and the industrial and streamlined machining is easy to realize.

Description

technical field [0001] The invention relates to ultra-precision machining in advanced optical manufacturing technology, in particular to a precision machining method for a Cassegrain primary mirror and a supporting fixture thereof. Background technique [0002] With the development of science and technology, aspheric surface processing technology has begun to be favored and continuously explored by people. The reason is that aspheric optical parts have incomparable advantages over spherical optical parts; due to the excellent optical properties of aspheric surfaces, the optical system The imaging quality has been greatly improved, and the aspheric surface is especially suitable for occasions where the size of the instrument is limited and the image quality is high, such as optical systems with large field of view, large aperture, high aberration requirements, and small structural requirements. In addition to being the main imaging element, the aspheric surface is often used ...

Claims

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Application Information

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IPC IPC(8): B24B13/02B24B13/005B24B13/01B24B49/00B24B49/16
CPCB24B13/02B24B13/0055B24B13/012B24B49/006B24B49/165
Inventor 韩庆
Owner SHANGHAI MODERN ADVANCED ULTRA PRECISION MFG CENT
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