近红外无创生化分析中高效双复合抛物面聚光系统设计  

Design of High-Efficiency Double Compound Parabolic Concentrator System in Near Infrared Noninvasive Biochemical Analysis

作　　者：高静[1,2] 卢启鹏[1] 彭忠琦[1] 丁海泉[1] 高洪智[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室,吉林长春130033 [2]中国科学院研究生院,北京100049

出　　处：《光谱学与光谱分析》2013年第5期1406-1410,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(60938002);中国科学院知识创新工程领域前沿项目(Y00232Q100);应用光学国家重点实验室开放课题(Y1Q03FQ113)资助

摘　　要：近红外无创生化分析中,要获得准确的血液生化成分信息,需要非常高的系统信噪比。为提高分析系统的信噪比,开展了以增大系统光能利用率为目标的高效双复合抛物面聚光(DCPC)系统研究。首先,针对近红外无创生化分析中光学系统集光要求,研究了复合抛物面聚光器(CPC)出射光特点,确定出一级CPC最大聚光角范围。然后,通过比较标准型和截短型DCPC光能利用率变化,优化出最佳结构参数。最后,结合皮肤组织光学参数,计算了入射光波长为1 000nm时,DCPC系统、CPC-聚焦反射镜系统以及无光学收集系统的光能利用率。结果显示,三种系统的光能利用率分别为1.46%,0.84%,0.26%。设计的DCPC系统增强了对人体漫反射光的收集能力,可有效提高无创生化分析系统的信噪比及整体分析精度。High signal-to-noise ratio （SNR） of system is necessary to obtain accurate blood components in near infrared noninva- sive biochemical analysis. In order to improve SNR of analytical system, high-efficiency double compound parabolic concentrator （DCPC） system was researched, which was aimed at increasing light utilization efficiency. Firstly, with the request of collection efficiency in near infrared noninvasive biochemical analysis, the characteristic of emergent rays through compound parabolic con-centrator （CPC） was analyzed. Then the maximum focusing angle range of the first stage CPC was determined. Secondly, the light utilization efficiency of truncated type was compared with standard DCPC, thus the best structure parameters of DCPC sys- tem were optimized. Lastly, combined with optical parameters of skin tissue, calculations were operated when incident wave- length is 1 000 nm. The light utilization efficiency of DCPC system, CPC-focusing mirror system, and non-optical collecting sys- tem was calculated. The results show that the light utilization efficiency of the three optical systems is 1.46%, 0.84% and 0. 26% respectively. So DCPC system enhances collecting ability for human diffuse reflection light, and helps improve SNR of noninvasive biochemical analysis system and overall analysis accuracy effectively.

关 键 词：复合抛物面聚光器 光学设计 近红外 无创生化分析 

分 类 号：O657.33[理学—分析化学] TH744[理学—化学]