Fabrication and experiment of aluminum diffuser for CO2detector calibration on orbit
-
摘要:为了研制CO2探测仪定标漫反射板,采用物理研磨和化学腐蚀相结合的工艺方法制作了铝漫反射板试验样块,搭建了相对双向反射分布函数和半球反射率的测试装置。在0和45入射光的情况下,对可见近红外波段的测试结果表明:表面粗糙度影响铝漫反射板的朗伯特性,240#研磨砂制作的漫射板的朗伯特性最佳;化学腐蚀不仅能提高铝漫反射板的朗伯特性,也能提高铝漫反射板的半球反射率。当选取碱蚀温度为室温20℃、NaOH溶液浓度为52.6 g/L时,最佳腐蚀时间约为4 min;镀膜使铝漫反射板的半球反射率平均提高20%,但会使其朗伯特性稍变差;不同波长处铝漫反射板的相对双向反射分布函数略有不同,但变化趋势相同。实验确定了影响漫反射板漫反射特性的关键参数,并定量优化了这些工艺参数,为进一步研制CO2探测仪星上定标漫反射板提供了依据。
-
关键词:
- CO2探测仪/
- 化学腐蚀/
- 铝漫反射板/
- 半球反射率/
- 相对双向反射分布函数
Abstract:To develop a diffuser for CO2 detector calibration, the process of physical grinding and chemical etching was used to produce the test specimens of the aluminum diffuser for the CO2 detector calibration, and their test devices for relative Bidirectional Reflectance Distribution Function(BRDF) and hemispherical reflectance were built. In the case of 0 and 45 of the incident lights, the test results for visible to near-infrared band, show that the surface roughness affects Lambert characteristics of the aluminum diffuser and the Lambert characteristics of the diffuser made of 240# abrasive grit is the best. Chemical corrosion can not only improve Lambert characteristics of the aluminum diffuser, but also can improve the hemispherical reflectance. When etching temperature is selected at 20℃ and the concentration of NaOH solution is in 52.6 g/L, the optimal time of corrosion is about 4 min. Aluminizing makes hemispherical reflectance of aluminum diffuser to be improved by 20% on average, but it makes Lambert characteristics deteriorated. Furthermore, the relative BRDF of aluminum diffuser is slightly different at different wavelengths, but shows the same trend. The experiments in this paper determine the key parameters affecting the diffuse reflection characteristics of the diffuser, quantitatively optimize process parameters, and provide a basis for the further development of the diffuser for CO2 detector calibration on orbit. -
[1] 郑玉权. 温室气体遥感探测仪器发展现状[J]. 中国光学,2011,4(6):546-561. ZHENG Y Q. Development status of remote sensing instruments for greenhouse gases[J].Chinese Optics,2011,4(6):546-561.(in Chinese) [2] 赵其昌,杨勇,李叶飞,等. 大气痕量气体遥感探测仪发展现状和趋势[J]. 中国光学,2013,6(2):156-162. ZHAO Q CH,YANG Y,LI Y F,et al.. Development status and trends of atmospheric trace gas remote sensing instruments[J].Chinese Optics,2013,6(2):156-162.(in Chinese) [3] WEIDNER V R,HSIA J J. NBS specular reflectometer spectrophotometer[J].Appl. Opt.,1980,19(8):1268-1273. [4] HSIA J J,RICHMOND J C. Bidirectional reflectometer Part 1[J].J. Research of National Bureau of Standards,1976,80A(2):189-205. [5] YOUNG E R,CLARK K C,BENNETT R B,et al.. Measurements and parameterization of the bi-directional reflectance factor of BaSO4paint[J].Appl. Opt.,1980,19(20):3500-3505. [6] BARNES P Y,HSIA J J. UV Bidirectional reflectance distribution function measurements for diffuser[J].SPIE,1992,1764:285-289. [7] FLOWER W K, NELSON V W. Performance of various diffuser materials in the absolute radiometric calibration of the SBUV/2[J].Metrologia,1993,30(4):255-257. [8] FEGLEY A A,FLOWER V K. Radiometric calibration of SBUV/2 instruments:retrospective improvements[J].Metrologia,1991,28(3):297-300 [9] 李欢,周峰. 星载超光谱成像技术发展与展望[J]. 光学与光电技术,2012,10(5):38-44. LI H,ZHOU F. Developments of spaceborne hyperspectral imaging technique[J].Optics&Optoelectronic Technology,2012,10(5):38-44.(in Chinese) [10] 刘倩倩,郑玉权. 超高分辨率光谱定标技术发展概况[J]. 中国光学,2012,5(6):566-577. LIU Q Q,ZHENG Y Q. Development of spectral calibration technologies with ultra-high resolutions[J].Chinese Optics,2012,5(6):566-577.(in Chinese) [11] 李博,林冠宇,张明宇,等. 紫外-真空紫外空间遥感仪器漫反射板的制备[J]. 光学 精密工程,2009,17(3):476-481. LI B,LIN G Y,ZHANG M Y,et al.. Fabrication of diffuser in UV-VUV space remote sensing instrument[J].Opt. Precision Eng.,2009,17(3):476-481.(in Chinese) [12] 金辉,姜会林,郑玉权,等. 高光谱遥感器的光谱定标[J]. 发光学报,2013,34(2):235-239. JIN H,JIANG H L,ZHENG Y Q,et al.. Spectral calibration of the hyperspectral optical remote sensor[J].Chinese J. Luminescence, 2013,34(2):235-239.(in Chinese) [13] 金伟其,胡威捷.辐射度光度与色度及其测[M]. 北京:北京理工大学出版社,2006. JIN W Q,HU W J.Radiancy Luminosity and Chroma and Its Measurement[M]. Beijing:Beijing Institute of Technology Press,2006.(in Chinese) [14] GEORGIEV G T,BUTLERB J J. Brdf study of gray-scale spectralon[J].SPIE,2008,7081:1-9. [15] STOVER J C.Optical Scattering:Measurement and Analysis[M]. 3rd ed. Bellingham:SPIE Press,2012.
点击查看大图
计量
- 文章访问数:2120
- HTML全文浏览量:462
- PDF下载量:693
- 被引次数:0