第18卷第11期 2010年11月
文章编号
1004-924X(2010)11-2325-07
光学精密工程
Optics and Precision Engineering
强度调制偏振光谱仪的系统设计
宋志平1.2，洪津"，乔延利1
（1.中国科学院通用光学定标与表征技术重点实验室，安徽合肥230031；
2.安徽大学物理与材料科学学院，安徽合肥230039）
Vol.18
No.1 Nov.2010
制器设计、光谱仪选型与系统指标间的匹配关系。给出了一个完整的设计实例，以搭台方式建立了强度调制偏振光谱仪原理实验装置，并对平行光管直接输出的光和经起偏器起偏后输出的光进行了偏振光谱测量和分析。结果表明：在有效测量波段内（525～700nm），以卤钨灯为光源的平行光管直接输出光的偏振度值<10%；经过线偏振器起偏后输出光的
偏振度值接近100%，与理论分析的结果一致，验证了基于强度调制技术设计偏报光谱仪方法的可行性。关键调：光学测量；偏振光谱仅；强度调制；解调
中图分类号：TP73;TH744.1
文献标识码：A
doi;10.3788/OPE,20101811.2325
Systemdesignof intensitymodulation spectropolarimeter
SONG Zhi-ping, HONG Jin', QIAO Yan-li'
(1.Key Laboratory of General Optical Calibration and Characterization
ChineseAcademyofSciences,Hefei230031,China;
2.School of Physics &Material Science,Anhui University,Hefei 230039,China)
Abstract: The parameter design of a Intensity Modulation Spectropolarimeter(IMS) was studied and analyzed in this paper. The basic concept and structure of the IMS were described and the dependence on modulator design, spectrometer selection and system performance was analyzed. By taking an inte grated system design for an example,the IMS experimental system was established in the laboratory, the basic concepts and characteristics of the technique were verified and the polarization spectra from a typical light source were also tested. Experimental results show that the polarized degree of the light from a tungsten-halogen lamp collimator is less than 1o%, but it is about 1oo % when the light is po-larized by a polarizer in the spectral range of 525-700 nm. These results are coincident with the theo-retical results well, which verifies the feasibility of method that spectropolarimeter can be realized based on the intensity modulation,
Key words: optical measurement;spectropolarimeter;intensity modulation; demodulation
收稿日期：2010-02-02；修订日期：2010-04-08.
基金项目：国家自然科学基金资助项目（No.60778023）