A Global Correction Process for Flat Optics With Patterned Polishing Pad
A Global Correction Process for Flat Optics With Patterned Polishing Pad
复制标题
带有图案抛光垫的平面光学器件的整体校正工艺
DOI:
10.1115/1.4044250
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发表时间:
2019-09
期刊:
影响因子:
--
通讯作者:
Guo Dongming
中科院分区:
文献类型:
--
作者:
Li Weisi;Zhou Ping;Geng Zhichao;Yan Ying;Guo Dongming
To improve the efficiency of flat optics fabrication, a global correction method with the patterned polishing pad is developed in this paper. Through creating grooves on a polishing pad, the contact pressure distribution on the optics surface can be adjusted to change the material removal rate (MRR) distribution during polishing. Using the patterned pad, the selective removal ability of the polishing process is greatly enhanced. The predictability and stability of the MRR distribution are the preconditions to efficiently implement the proposed global correction method. Relying on the MRR distribution prediction method proposed and validated in this paper, the pad pattern can be designed based on the original surface figure of the workpieces. The designed groove pattern is created on the polishing pad using the custom-developed equipment. Then, the optical glass is polished on the designed pad with the optimized polishing time. A flat optical glass sample (Φ 100 mm) is polished with the global correction method to show its feasibility and advantage. The correction instance shows that the peak-to-valley (PV) value of the surface profile (with 3 mm edge exclusion) dropped from 1.17 µm to 0.2 µm in 14 min using a polyurethane pad with two ring grooves. Comparing with the conventional polishing process, which usually takes hours or days, the global correction method proposed in this paper can improve the efficiency of the optics manufacturing significantly.
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DOI:
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发表时间:
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期刊:
--
影响因子:
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DOI:
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发表时间:
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期刊:
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影响因子:
--
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影响因子:
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