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Owing to space optical system working for a long time outside the field of view, where there is strong background radiation, and the fact that the point source transmittance (PST) is an important evaluation indicator for stray light suppression of this optical system, the development of stray light equipment for testing PST has received more and more attention. Though the development of PST testing system has been extensively studied, none of them elaborate on the calibration of the PST testing system. Besides, most of the PST testing systems are at a laboratory research stage, and the calibration of neither testing stability nor accuracy is recognized. Therefore, on the basis of the PST testing system established, one calibration lens is designed to calibrate the PST testing system. By comparing the measured PST values of the calibration lens with the analyzed values, the PST testing system can be evaluated. The calibration lens model is built to analyze PST values at different off-axis angles by using the ray tracing software Tracepro. We consider the accuracy of modeling, and on the basis of simplifying the structure design, we measure bidirectional reflectance distribution function (BRDF) values of the painted surface of the calibration lens, and then estimate values of lens surface from Harvey-Shack model and PSD theory by taking these property data into the model of simulation. Ultimately PST analyzed values of calibration lens can be obtained. Finally, by comparing the measured values of calibration lens, which are tested by using PST testing system, with the analyzed values, the calibration of the PST testing system is completed. In the PST testing process of calibration lens, by analyzing the data at different off-axis angles, the accuracy of repeated measurements and threshold of PST testing system can be obtained. At the same time, testing errors caused by the stability of light source, detector linearity, air scattering and structure of double cylindrical chamber are analyzed through the testing data. The data show that when double cylindrical chamber clean class is ISO7, the PST threshold of this equipment is 10-8, and the accuracy of repeated measurements is 7.9%. Taking into account the detection capability, the PST threshold of this equipment is 10-10 when environmental condition is better than ISO6.
[1] Kemp J C, Wyatt C L 1977 Opt. Eng. 16 164412
[2] Fleming J, Grochocki F, Finch T, Willis S, Kaptchen P 2008 Proc. SPIE 7069 70690O
[3] Peterson G L 2008 Proc. SPIE 7069 70690M
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[5] Wang Z L, Gong Z Q, Zhang W, Wang F G 2011 Opti. Tech. 37 401 (in Chinese) [王治乐, 龚仲强, 张伟, 王付刚 2011 光学技术 37 401]
[6] Gong Y J, Wu Z S 2009 Acta Phys. Sin. 58 6227 (in Chinese) [宫彦军, 吴振森 2009 58 6227]
[7] Sun L J, Tian Z S, Ren X Y, Zhang Y C, Fu S Y 2014 Acta Phys. Sin. 63 134211 (in Chinese) [孙兰君, 田兆硕, 任秀云, 张延超, 付石友 2014 63 134211]
[8] Sun L M, Zhao J L, Ren J, Zhang H J 2008 Acta Photon. Sin. 37 2529 (in Chinese) [孙礼民, 赵建林, 任驹, 张好军 2008 光子学报 37 2529]
[9] Yuan Y, Sun C M, Zhang X B 2010 Acta Phys. Sin. 59 2097 (in Chinese) [袁艳, 孙成明, 张修宝 2010 59 2097]
[10] Fan M, Chen L F, Li S S, Tao J H, Su L, Zou M M 2014 Chin. Phys. B 23 104203
[11] Ren X C, Guo L X 2008 Chin. Phys. B 17 2491
[12] Luo W, Zhang M, Zhou P, Yin H C 2010 Chin. Phys. B 19 084102
[13] Guo L X, Gou X Y, Zhang L B 2014 Chin. Phys. B 23 114102
[14] Fest E C 2013 Stray Light Analysis and Control (Washington: SPIE) pp62-75
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[1] Kemp J C, Wyatt C L 1977 Opt. Eng. 16 164412
[2] Fleming J, Grochocki F, Finch T, Willis S, Kaptchen P 2008 Proc. SPIE 7069 70690O
[3] Peterson G L 2008 Proc. SPIE 7069 70690M
[4] Liao S, Shen M Z 1996 J. Infra. Milli. Wave. 15 375 (in Chinese) [廖胜, 沈忙作 1996 红外与毫米波学报 15 375]
[5] Wang Z L, Gong Z Q, Zhang W, Wang F G 2011 Opti. Tech. 37 401 (in Chinese) [王治乐, 龚仲强, 张伟, 王付刚 2011 光学技术 37 401]
[6] Gong Y J, Wu Z S 2009 Acta Phys. Sin. 58 6227 (in Chinese) [宫彦军, 吴振森 2009 58 6227]
[7] Sun L J, Tian Z S, Ren X Y, Zhang Y C, Fu S Y 2014 Acta Phys. Sin. 63 134211 (in Chinese) [孙兰君, 田兆硕, 任秀云, 张延超, 付石友 2014 63 134211]
[8] Sun L M, Zhao J L, Ren J, Zhang H J 2008 Acta Photon. Sin. 37 2529 (in Chinese) [孙礼民, 赵建林, 任驹, 张好军 2008 光子学报 37 2529]
[9] Yuan Y, Sun C M, Zhang X B 2010 Acta Phys. Sin. 59 2097 (in Chinese) [袁艳, 孙成明, 张修宝 2010 59 2097]
[10] Fan M, Chen L F, Li S S, Tao J H, Su L, Zou M M 2014 Chin. Phys. B 23 104203
[11] Ren X C, Guo L X 2008 Chin. Phys. B 17 2491
[12] Luo W, Zhang M, Zhou P, Yin H C 2010 Chin. Phys. B 19 084102
[13] Guo L X, Gou X Y, Zhang L B 2014 Chin. Phys. B 23 114102
[14] Fest E C 2013 Stray Light Analysis and Control (Washington: SPIE) pp62-75
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