积分球出射照度与入射光束几何性质关系分析

针对采用积分球作为光收集器的光学透射率测量过程中,存在透射率测量值超出100%这一非正常情况。建立了积分球出射照度与入射光束几何性质的关系模型,利用该模型进行了仿真实验。对于直径300 mm,开口比为1%的积分球,入射光束几何性质改变引起的积分球出射照度相对误差为3.4%,采用该积分球测量透射率造成的误差可达3.4%,与实测结果吻合。光斑位置和分布的随机性导致透射率测量值超出100%。该误差源具有隐蔽性和不可避免性,研究该误差源对于提高积分球式光度测量精度具有重要的理论和工程价值。

Relationship analysis of output illuminance of integrating sphere and incident beam geometry

Aiming to the optical transmittance measurement using integrating sphere as optical concentrator,there exists a non-normal situation that the measured value of transmittance exceeds 100%.A model of the relationship between the output illuminance of integrating sphere and the incident beam geometry was developed to aid in a simulation experiment.For a 300 mm diameter and 1% core-opening ratio integrating sphere,the relative error of output illuminance due to changes in the incident beam geometry is 3.4% and ...