Study on combined polishing process of aspherical aluminum mirrors

Jinqiu Deng; Xiaoqiang Peng; Hao Hu; Kunpeng Ge

doi:10.1117/12.2282750

24 October 2017 Study on combined polishing process of aspherical aluminum mirrors

Jinqiu Deng, Xiaoqiang Peng, Hao Hu, Kunpeng Ge

Proceedings Volume 10460, AOPC 2017: Optoelectronics and Micro/Nano-Optics; 104600A (2017) https://doi.org/10.1117/12.2282750
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China

Abstract

The aluminum mirrors are widely used as important optical components in some vital fields such as astronomical instruments or military installations due to the unique advantages of aluminum alloy. In order to simplify the structure of optical system and improve the performance at the same time, it’s a tendency that the optics will be designed to aspherical or other freeform shapes. However, the traditional techniques are falling to have adequate abilities to deal with the increasing demands of aluminum optics. For example, the tool marks leaved on the surface from single point diamond turning (SPDT) has obvious adverse effects to optical system. The deterministic and sub-aperture polishing process has showed the potential to fabricate complex shapes over the few years. But it’s still recognized as a problem to polish bare aluminum directly because of its soft surface and active chemical characteristics. Therefore, a combination of magnetorheological finishing (MRF) and small tool polishing (STP) is applied to obtain high performance aluminum optics in this paper. A paraboloid aluminum mirror was polished with this proposed method, and the results showed that the surface texture of the sample is restrained from rms 0.409λ (λ=632.8nm) to rms 0.025λ, and the surface roughness is improved from average Ra 6~7nm to Ra 3~4nm.

Citation Download Citation

Jinqiu Deng, Xiaoqiang Peng, Hao Hu, and Kunpeng Ge "Study on combined polishing process of aspherical aluminum mirrors", Proc. SPIE 10460, AOPC 2017: Optoelectronics and Micro/Nano-Optics, 104600A (24 October 2017); https://doi.org/10.1117/12.2282750

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available