Precision grinding of optical glasses by laser micro-structured grinding wheels

GUO Bing; ZHAO Qing-liang; CHEN bing; YU Xin

doi:10.3788/OPE.20142210.2659

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Precision grinding of optical glasses by laser micro-structured grinding wheels

更新时间：2020-08-13

- Precision grinding of optical glasses by laser micro-structured grinding wheels
- Optics and Precision Engineering Vol. 22, Issue 10, Pages: 2659-2666(2014)
- 作者机构：
  
  1. 哈尔滨工业大学机电工程学院精密工程研究所,黑龙江哈尔滨,150001
  2. 哈尔滨工业大学航天学院光电子技术研究所,黑龙江哈尔滨,150080
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20142210.2659
  CLC： TQ171.6+8
- Received：29 November 2013，
  
  Revised：23 January 2014，
  
  Published：25 October 2014
- 稿件说明：
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郭兵, 赵清亮, 陈冰等. 光学玻璃的激光微结构化砂轮精密磨削[J]. 光学精密工程, 2014,22(10): 2659-2666

GUO Bing, ZHAO Qing-liang, CHEN bing etc. Precision grinding of optical glasses by laser micro-structured grinding wheels[J]. Editorial Office of Optics and Precision Engineering, 2014,22(10): 2659-2666
郭兵, 赵清亮, 陈冰等. 光学玻璃的激光微结构化砂轮精密磨削[J]. 光学精密工程, 2014,22(10): 2659-2666 DOI： 10.3788/OPE.20142210.2659.

GUO Bing, ZHAO Qing-liang, CHEN bing etc. Precision grinding of optical glasses by laser micro-structured grinding wheels[J]. Editorial Office of Optics and Precision Engineering, 2014,22(10): 2659-2666 DOI： 10.3788/OPE.20142210.2659.

摘要

为了降低大磨粒金刚石砂轮磨削光学玻璃时的亚表层损伤

利用纳秒脉冲激光对金刚石砂轮进行了表面微结构化加工

并采用该砂轮研究了光学玻璃的精密磨削加工.首先

计算了金刚石磨粒在纳秒脉冲激光辐射下的烧蚀阈值和激光束腰半径;然后

分析了纳秒脉冲激光在金刚石磨粒上加工的微结构形貌以及微结构化过程中的热损伤;最后

采用微结构化大磨粒金刚石砂轮进行光学玻璃的磨削实验

并分析了亚表层的损伤情况.实验结果表明:金刚石磨粒在纳秒脉冲激光辐射下的烧蚀阈值为0.89 J/cm

激光束腰半径为17.16 μm.在粒度为150 μm的大磨粒电镀金刚石砂轮上可以实现结构尺寸为20 μm的微结构表面加工.与传统金刚石砂轮相比

微结构化砂轮磨削后的光学玻璃亚表层损伤深度降低了40 %

达到了降低光学玻璃磨削亚表层损伤的目的.

Abstract

To reduce the subsurface damage of optical glasses induced by a coarse-grained diamond wheel

the diamond wheel surface was processed in a micro-structuring mode by a nanosecond pulse laser. The grinding wheel was used to investigate the grinding performance of optical glasses. First

the ablation threshold of diamond grits under a ns laser pulse and the laser beam waist radius were calculated. And then

the ablation morphological characteristics were explored

and the thermal damage of diamond grits was analyzed. Finally

the optical glass grinding experiments were performed and the subsurface damage was analyzed. The experimental results show that the ablation threshold of diamond grits and the beam waist radius are 0.89 J/cm

and 17.16 μm

respectively. Base on the optimization of laser parameters

a micro-structured surface with a size of 20 μm is able to generate on an electroplated diamond wheel with a grit size of 150 μm. As compared with a conventional diamond wheel

the subsurface damage depth of optical glass workpiece induced by micro-structured diamond wheel is reduced by 40% and realizes the decrease of subsurface damage in optical glass precision grinding.

关键词

Keywords

references

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吕东喜,王洪祥,黄燕华. 光学材料磨削的亚表面损伤预测[J]. 光学精密工程,2013,21(3):680-686. LÜ D X, WANG H X, HUANG Y H.Prediction of grinding induced subsurface damage of optical materials[J].Opt. Precision Eng.,2013,21(3):680-686.(in Chinese)

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