Manufacturing of a big aperture lightweight mirror

CHEN Ya; SONG Su-mei

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Manufacturing of a big aperture lightweight mirror

更新时间：2020-08-12

- Manufacturing of a big aperture lightweight mirror
- Optics and Precision Engineering Vol. 12, Issue 4, Pages: 402-405(2004)
- 作者机构：
  
  中国科学院, 长春光学精密机械与物理研究所, 吉林, 长春, 130033
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP391
- Received：24 March 2004，
  
  Revised：15 June 2004，
  
  Published Online：15 August 2004，
  
  Published：15 August 2004
- 稿件说明：
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陈亚, 宋淑梅. 大口径轻质反射镜坯的制造[J]. 光学精密工程, 2004,(4): 402-405

CHEN Ya, SONG Su-mei. Manufacturing of a big aperture lightweight mirror[J]. Editorial Office of Optics and Precision Engineering, 2004,(4): 402-405
陈亚, 宋淑梅. 大口径轻质反射镜坯的制造[J]. 光学精密工程, 2004,(4): 402-405 DOI：

CHEN Ya, SONG Su-mei. Manufacturing of a big aperture lightweight mirror[J]. Editorial Office of Optics and Precision Engineering, 2004,(4): 402-405 DOI：

摘要

给出了制造大口径轻质反射镜坯的机械法减重技术及所制造的反射镜坯.在镜坯制造过程中通过计算机辅助设计搜索轻量化加工区域的形状、大小、深度

并对其进行分类标识;编辑TPH(toolpath)轨迹数据文件

编写CNC(comput ernumbercontrol)数控系统的零件加工程序

由数控系统在图形方式下控制实际加工.同时采用化学方法消除加工过程中产生的应力与微小裂纹.加工出的大口径轻质反射镜坯达到设计要求

轻量化率达到65%以上

加工后的非球面面形精度达到0.029λ(rms

λ=633nm).制造过程中在不同支撑状态下

变形量很小

保持了非球面面形精度稳定性

显示出了结构的稳定性.该方法已经成为大口径反射镜制造的关键支撑技术.

Abstract

The mechanical light-weighting technique to manufacture a big aperture lightweight mirror was given. Based on CAD(computer aided design)

the technique searches the zone of the lightweight process and marking it

then chooses the radii of the diamond tool

and describing the tool path in the lightweight process zone. If the area of the tool path covers the lightweight process zone

it will write down the tool path datum for the editing CNC program. The CNC program is made up of TPH documents and program language that follow definite regulations of frame

syntax

and format. The CNC program can control system functions such as principal axis rotating speed

tool moving speed

cooling form of mirror

workbench travel path.Meantime the chemical etching is used to eliminate the stress and minute cracks induced in the manufacturing process

which can affect the quality of the mirror and reduce its working life

and even more lead to the serious sequent of mirror breaking. Using the technique

a big aperture lightweight mirror was achieved. The results show that the big aperture lightweight mirror has met the requested specifications

with the lightweight rate of more than 65%

the precision of the aspheric surface is 0.029 λ(rms

λ=633 nm).The mirror is steady in both its testing and working status.

关键词

Keywords

references

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付芸,徐长吉,丁亚林.航空遥感相机扫描反射镜支撑技术[J].光学精密工程,2003,11(6):551-554.FU Y, XU CH J, DING Y L. Scanning mirror supporting structure of aerial remote sensing camera[J]. Optics and Precision Engineering, 2003,11(6): 551-554.(in Chinese)

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