Stray Light of Space-Borne Hyperspectral Imager and Its Measurement
ZHANG Jun-qiang1,2, WU Qing-wen1, YAN Chang-xiang1
1. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences，Changchun 130033, China 2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Abstract：Hyperspectral imager has more spectral channels and higher spectral resolution compared to normal spectral instrument. Stray light is one of the important reasons affecting the spectral accuracy of the hyperspectral imager, but the current stray light measurements can’t meet the need. Definition, sources and harmfulness of stray light are described in the present paper. The feasibility and superiority of the stray light factor di,j, used to describe the stray light characteristics of the spectral instruments, is investigated thoroughly, where the definition, physical significance and value of engineering application of stray light interference factor fi(λ) and stray light disturbance factor Fi(λ) are given. Finally, the system components, measurement procedure and measurement results of the stray light measurement system, using narrow-band filter, are introduced. Results show that the stray light factor di,j meets the need of the stray light measurement because it can indicate the stray light characteristics of the spectral instruments without relationship to the light source, filter, detector and other measurement conditions, and the measurement efficiency is increased at least one-fold than the spectral stray light factors method.
[1] Robert P B. SPIE, 1990, 1331: 2. [2] Stephen M P. SPIE, 2003, 4842：128. [3] Sholl M J, Grochocki F S, Fleming J C, et al. SPIE, 2007, 6675: 66750C. [4] LIU Rui-xiang(刘瑞祥). Opt. Precision Eng.(光学精密工程)，1977，(5): 11. [5] LI Ting, YANG Jian-feng, RUAN Ping, et al(李 婷, 杨剑锋, 阮 萍, 等). Acta Photonica Sinica(光子学报), 2007, 36：137. [6] SHI Guang-hui(史光辉). Opt. Precision Eng.(光学精密工程), 2008, 5(5): 10. [7] ZHONG Xing, ZHANG Lei, JIN Guang(钟 兴, 张 雷, 金 光). Infrared and Laser Engineering(红外与激光工程), 1997, 37(2): 316. [8] LI Xin-yao, YUAN Yu-kai, PEI Yun-tian, et al(李欣耀, 原育凯, 裴云天, 等). Science Technology and Engineering(科学技术与工程), 2006, 6(12): 1605. [9] HAO Yun-cai, XIAO Shu-qin, WANG Li-xia(郝云彩, 肖淑琴, 王丽霞). Chinese Space Science and Technology(中国空间科学技术), 1995, 3: 40. [10] YU Bing-xi(禹秉熙). Acta Metrologica Sinica(计量学报), 1991, 12(3): 177. [11] YU Xun, HOU Xi-qi(于 洵, 候西旗). Application Optics(应用光学), 1991, 12(5): 53. [12] Cutter M A, Lobb D R, Williams T L, et al. SPIE, 1999, 3753: 180. [13] Stuf Fler T, Kaufmannb C, Hoferea S, et al. Acta Astronautica, 2007, 61: 115. [14] Zong Y Q, Steven W B, Johnson B C, et al. SPIE, 2005, 5882: 588201. [15] ZHANG Jun-qiang, DONG De-yi, YAN Chang-xiang(张军强, 董得义，颜昌翔). Opt. Precision Eng.(光学精密工程), 2009, 17(10): 2457. [16] WANG Yi-qun, YAN Chang-xiang, MIAO Chun-an(汪逸群, 颜昌翔, 苗春安). Chinese Journal of Optics and Applied Optics(中国光学与应用光学), 2009, 2(4): 304. [17] Mielenz K D. Appl. Opt., 1982, 21: 3354. [18] Tarrant A W S. Opt. Acta, 1978, (25): 1667. [19] Miranda C. Appl Spectrosc, 1971，(25): 557. [20] Wilber Kaye. Stray Radiation in Spectrophotometers. American Laboratory, 1983. [21] CHEN Zhi-yi(陈之宜). Journal of Hubei Polytechnic University(湖北工学院学报), 2000, 15(3): 66.
