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Optical Surfacing of Reflecting SiC Mirrors Of 520mm R-C System
Lvjun Yuan; Bin Wang
Source PublicationAdv. Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
PagesVol.6149 3N-1-5
Conference Date2005-11-2
Conference PlaceXian, China
Funding OrganizationThe International Society for Optical Engineering
In the area of astronomy and space camera, the application of silicon carbide (SiC) will have a good future for its specific stiffness and quickly thermal diffusion. However, SiC as a new material of optical mirror is difficult to process efficiently because of its specific characteristics such as stiffness and material structure. To manufacture the aspheric SiC
mirrors of a R-C system with aperture 520mm in diameter, we starts to research on optical surfacing of SiC. Some small SiC parts are used to do serial surfacing experiments for finding a technology to improve the surface roughness of SiC. Test result shows that the surface roughness (RMS) of the best plate is better than 1.0nm. Finally, the surfacing results of the ellipsoid primary mirror with aperture 520mm in diameter and the hyperboloid secondary mirror with aperture 114mm in diameter of the R-C system are measured. The surface error (RMS) of them is less than 15nm, and the surface roughness of them is better than 1.8nm. The results meet the requirements of optical mirrors.
KeywordSic Reflector Optical Surfacing Of Aspheric Mirrors
Subject Area天文镜面(材料、加工、检测)
Document Type会议论文
Recommended Citation
GB/T 7714
Lvjun Yuan,Bin Wang. Optical Surfacing of Reflecting SiC Mirrors Of 520mm R-C System[C]:SPIE,2006:Vol.6149 3N-1-5.
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