Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 9, 2014
|
|
---|---|---|
Article Number | 14053 | |
Number of page(s) | 5 | |
DOI | https://doi.org/10.2971/jeos.2014.14053 | |
Published online | 10 December 2014 |
Regular paper
Ritchey–Common test for a 1.5 m–diameter flat mirror
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
Received:
2
September
2014
Revised:
28
November
2014
This study intensively investigates the Ritchey–Common test to enable high-precision measurement of a plane mirror figure with a diameter of 1.5 m. We present a method for separating the adjustment error combined with tested data and the least–square method. We also use the transformation relationship of coordinates and amplitude between the test system pupil plane and the flat mirror to calculate the flat mirror surface error. Ritchey–Common test is conducted on a 100 mm–diameter plane mirror. Results prove that the algorithm can effectively isolate the adjusting–error effect. Compared with the direct test results from interferometer, the RMS calculation accuracy of the algorithm is better than l/100 (l = 0.6328 μm). Accordingly, we build a Ritchey–Common test light path for the 1.5 m plane mirror. After analyzing the factors affecting the experiment results, we obtain the surface PV value of 0.391 l and RMS of 0.0181 l. Finally the test achieves full aperture detection for a large–diameter plane mirror surface.
Key words: Ritchey-Common / surface / flat / optical / interference
© The Author(s) 2014. All rights reserved.
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