Wang Xiaokun. Fabrication and testing of an off-axis aspheric surface with abnormal shape[J]. Infrared and Laser Engineering, 2014, 43(9): 2959-2963.
| Citation:
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Wang Xiaokun. Fabrication and testing of an off-axis aspheric surface with abnormal shape[J]. Infrared and Laser Engineering, 2014, 43(9): 2959-2963.
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Fabrication and testing of an off-axis aspheric surface with abnormal shape
- 1.
Key Laboratory of Optical System Advanced Manufacturing Technology,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China
- Received Date: 2014-01-08
- Rev Recd Date:
2014-02-12
- Publish Date:
2014-09-25
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Abstract
In order to overcome the difficulty of manufacturing off -axis aspheric surface, the key technologies of fabricating and testing SiC aspheric mirror especially for off-axis asphere with abnormal shape were studied. The off -axis SiC aspheric surface was grinded and polished by DMG, FSGJ -2 numerical control machine and IBF, the contour and optical parameters were measured and controlled by the coordinate measuring machine and laser tracker. Finally, an example for fabricating and measuring a similar eight-square off-axis aspheric mirror with the aperture of 600 mm270 mm was given. For the purpose of testing the aspheric mirror by interferometry, a null lens compensator was specifically designed and developed. As results, the peak-to-valley (PV) and root mean square (RMS) values of the surface error are 0.219 and 0.018 (is 632.8 nm), respectively.
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