Computer controlled manufacturing during fine grinding stage of highly steep off-axis asphere with large aperture

LI Rui-gang; ZHENG Li-gong; ZHANG Feng; XUE Hong-mei; ZHANG Xue-jun

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Computer controlled manufacturing during fine grinding stage of highly steep off-axis asphere with large aperture

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- Computer controlled manufacturing during fine grinding stage of highly steep off-axis asphere with large aperture
- Optics and Precision Engineering Vol. 15, Issue 5, Pages: 633-639(2007)
- 作者机构：
  
  1. 中国科学院长春光学精密机械与物理研究所光学技术研究中心,吉林长春,130031
  2. 中国科学院研究生院北京,100039
  3. 河北工程大学,河北邯郸,056038
- 作者简介：
- 基金信息：
- DOI：
  CLC： TQ171.6+8
- Received：02 February 2007，
  
  Revised：13 April 2007，
  
  Published Online：30 May 2007，
  
  Published：30 May 2007
- 稿件说明：
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LI Rui-gang, ZHENG Li-gong, ZHANG Feng, et al. Computer controlled manufacturing during fine grinding stage of highly steep off-axis asphere with large aperture[J]. Optics and precision engineering, 2007, 15(5): 633-639.
DOI：

LI Rui-gang, ZHENG Li-gong, ZHANG Feng, et al. Computer controlled manufacturing during fine grinding stage of highly steep off-axis asphere with large aperture[J]. Optics and precision engineering, 2007, 15(5): 633-639. DOI：

摘要

对大口径高陡度离轴非球面的数控加工过程中遇到的矢高变化率太大、磨头去除特性改变等技术难题进行了深入细致的研究

并提出了相应的解决方法。首先

通过坐标变换降低高陡度离轴非球面的矢高变化率;然后

给出了磨头沿非球面的法线方向进行数控加工的具体实施方法;最后

对轮廓检验的结果进行修正

使之在法线方向投影

从而使数控加工能更加准确有效地控制面形误差收敛。给出了数控加工实例

精磨阶段达到面形精度PV:10.502 8 μm

RMS:0.829 3 μm。结果表明

提出的方法在工程中完全可行

并有较高的收敛效率。

Abstract

By studying and discussing on the technical puzzles of the high sagitta variation rate and the seriously changed removal characteristic of lap in computer controlled optical surfacing of highly steep off-axis aspheres with large aperture

the practicable solutions are given. Decreasing the sagitta variation rate through coordinates transforming

the computer controlled manufacturing method that the lap grinds along the normal of the asphere is carried out

then

revising the figure testing result to project it on the asphere's normal

and the revised result is used in computer controlled optical manufacturing to converge the figure error more precise and effective. Finally

a manufacturing example is given in the final figure precision of PV:10.502 8 μm and RMS:0.829 3 μm during fine grind ing stage. The results show that the methods are practical and have even higher convergence efficiency.

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