摘要
介绍了一种基于近红外LD光源及锁相检测技术的双积分球组织光学参量测量系统,波长范围为1300～1600nm,正弦电调制光信号,光开关切换不同波长.提出了积分球系统改进措施,测量了散射/吸收混合溶液在1310nm下的光学参量,结果显示,约化散射系数和吸收系数的测量相对偏差分别<5%和10%.
A multi-wavelength optical property measurement system based on LDs in near infrared,doubleintegrating-spheres, and lock-in detection was introduced. Laser Diodes in 1 300 - 1 600 nm were sinusoidaly modulated in 30 KHz and an optical switch was adopted for wavelength selection. Based on the investigation of the factors affecting the measurement accuracy, the system was fully improved. For evaluating the system,the optical properties of intralipid-10 % solution and a mixture of intralipid /CuSO4 were measured in 1 310 nm and compared with those reported in literatures or measured with other tools. It is concluded that the system can get the accurate reduced scattering coefficient and absorption coefficient with a relative error of less than 5% and 10% ,respectively.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2009年第7期1811-1815,共5页
Acta Photonica Sinica
基金
国家自然科学基金(60578008)
科技部"十一五"攻关项目(2006BAI03A03)
高等学校学科创新引智计划(B07014)资助
关键词
组织光学
光学参量
近红外光
双积分球
锁相测量
Tissue optics
Optical properties
Near infrared
Double integrating spheres
Lock-in measurement
