LIU Zhao-dong, CHEN Lei, HAN Zhi-gang, YAN Qing-wei, ZHU Ri-hong. Measurement of large aperture SiC flat mirrors by oblique incidence interferometry[J]. Editorial Office of Optics and Precision Engineering, 2011,19(7): 1437-1443
LIU Zhao-dong, CHEN Lei, HAN Zhi-gang, YAN Qing-wei, ZHU Ri-hong. Measurement of large aperture SiC flat mirrors by oblique incidence interferometry[J]. Editorial Office of Optics and Precision Engineering, 2011,19(7): 1437-1443 DOI: 10.3788/OPE.20111907.1437.
Measurement of large aperture SiC flat mirrors by oblique incidence interferometry
A self-developed large aperture near-infrared phase-shifting flat interferometer was used to perform an absolute test for a large aperture SiC flat mirror in an oblique incidence condition. Firstly
the cavity wavefront data were obtained in a standard Fizeau configuration
and then the test flat was put into the cavity in its normal axis with an angle to the optical axis of the interferometer to obtain the second wavefront data set. After processing the two data sets
the absolute vertical profile across the center of SiC mirror was also obtained.Finally
several absolute vertical profiles of the
630 mm SiC mirror were measured and the results indicate that PV and RMS of the center absolute vertical profiles are 0.061 and 0.014
respectively. The experimental results show that this measurement device can achieve the absolute tests of vertical direction of flat mirrors with the effective apertures larger than that of the interferometer
and it is especially applicable for the absolute tests of optical sur- faces coated with high-reflection films or metal surfaces.
关键词
Keywords
references
王旭,张学军. 固着磨料加工碳化硅反射镜的微观理论模型[J]. 光学 精密工程,2009,17(3):513-518. WANG X, ZHANG X J. Micro theoretical model for grinding SiC mirror with fixed abrasive[J]. Opt. Precision Eng., 2009,17(3):513-518. (in Chinese)[2] 高明辉,刘磊,任建岳. 空间相机反射镜碳化硅材料性能测试[J]. 光学 精密工程,2007,15(8):1170-1174. GAO M H, LIU L, REN J B. Characteristic test of SiC for space camera's mirror[J]. Opt. Precision Eng.,2007,15(8):1170-1174. (in Chinese)[3] 薛栋林,张忠玉,郑立功. 大口径碳化硅材料凸非球面反射镜的检验[J]. 光学 精密工程,2008,16(12):2491-2496. XUE D L, ZHANG ZH Y, ZHENG L G. Testing methods for large aperture convex SiC asphere mirror[J]. Opt. Precision Eng., 2008,16(12):2491-2496. (in Chinese)[4] PONCETTA J C, BEAVU V, DAURIOS J, et al. Metrology of large optical components for high power lasers[J]. SPIE,2003,4829:734-735.[5] MALACARA D. Optical Shop Testing [M]. New Jersey: JohnWiley&Sons,2007.[6] YELLOWHAIR J E. Advanced Technologies for Fabrication and Testing of Large Flat Mirrors.Arizona: University of Arizona,2007.[7] SEN H, NOVAK E, MIKE S. Application of ritchey-common test in large flat measurements[J]. SPIE,2001,4399:131-136.[8] SEN H, ZECCHINO M. Ritchey-common testing of large flats using a commercial interferometer[J]. Applied Optics,1996,35(7):1015-1021.[9] deGROOT P D. Diffractive grazing-incidence interferometer[J]. Applied optics,2000,39(10):1527-1530.[10] EVANS C J, HOCKEN R J, ESLER W T. Self-calibration reversal, redundancy, error separation, and 'absolute testing[J]. ClRP Annals,1996,45(2):627-628.[11] 徐德衍,王青,高志山,等. 现行光学元件检测与国际标准[M]. 北京:科学出版社,2009. XU D Y, WANG Q, GAO ZH S, et al. Current Optical Components Testing and International Standard[M].Beijing: Science Press,2009.