Improvement on nonuniformity for sphere mirrors with large radius of curvature

Manshe, 白满社 Bai; Pan, 李攀 Li; Jin-kuan, 张晋宽 Zhang; Lin, 滕霖 Teng

doi:10.3788/ope.20132103.0554

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, a high-quality surface or a suitable and highly precise test method is necessary [1,2]. Ritchey-Common (R-C) method is commonly used and effective for testing optical flat mirror surfaces of large aperture [3][4][5][6]. The R-C test requires a good sphere with a diameter that is approximately 1.3 times larger than that of the test flat used as a reference [7,8].…”

Section: Introductionmentioning

confidence: 99%

Influence of reference sphere on test accuracy of Ritchey–Common method

Zhu,

Zhang

2024

IET Optoelectronics

View full text Add to dashboard Cite

The authors analyse the influence of reference sphere on the test accuracy of Ritchey–Common method during testing of flat mirror surface. A simulation model is established to simulate the influence of different radii of curvature of reference sphere on system wavefront. Then, the difference between the flat mirror surface result with reference sphere surface error to the actual flat mirror surface is examined by this model. The test accuracy of flat mirror result can be effectively improved by eliminating the influence of the surface error of reference sphere. When the surface accuracy of the reference sphere is better than 0.01 λ, the influence on RMS test accuracy is within 0.01 λ. R–C test path is built to test a 100 mm‐diameter flat mirror surface, and its results are compared with those of the flat mirror surface without surface error of reference sphere and with the test result of the interferometer. When the surface accuracy of the actual used area of reference sphere is better than 0.01 λ, the effect on flat mirror RMS accuracy is within 0.01 λ. The RMS test accuracy can reach 0.01 λ, when the surface error of reference sphere is retained. The experiment verifies the correctness of the simulation results and guarantees the improvement in the test accuracy of R–C method.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of reference sphere on test accuracy of Ritchey–Common method

Zhu,

Zhang

2024

IET Optoelectronics

View full text Add to dashboard Cite

show abstract

Ritchey–Common test for a 1.5 m–diameter flat mirror

Zhu

Zhang

2014

J. Eur. Opt. Soc.-Rapid Publ.

View full text Add to dashboard Cite

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 λ/100 (λ = 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 λ and RMS of 0.0181 λ. Finally the test achieves full aperture detection for a large-diameter plane mirror surface.

show abstract

Improvement on nonuniformity for sphere mirrors with large radius of curvature

Cited by 2 publications

References 0 publications

Influence of reference sphere on test accuracy of Ritchey–Common method

Influence of reference sphere on test accuracy of Ritchey–Common method

Ritchey–Common test for a 1.5 m–diameter flat mirror

Contact Info

Product

Resources

About