为现场测量大型透明件的透光率和雾度，提出了基于双积分球结构的测量和系统参数标定方案，并设计研制了相应的透光率和雾度测量装置。该装置通过六维机械调整装置完成光路调整，基于LED光源的照明准直系统产生调制平行光，最后采用双积分球结构的探测接收装置并结合锁相放大技术，实现光电信号的解调。测试结果表明，该装置对透光率测量的绝对误差不超过1%，对雾度测量的绝对误差不超过0.3%，符合工程应用对系统测量精度提出的要求。另一方面，装置具有很好的重复性，其对透光率和雾度测量的相对标准差分别为0.06 %和0.05%。

In order to obtain the luminous transmittance and haze of large transparent component in field, measurement scheme and method of calibration of system parameters based on double integrating spheres structure were presented. Furthermore the testing device was designed and manufactured. The optical path of device was adjusted by 6 dimensional mechanical adjustment structure firstly. Then the modulated directional light was generated by the illumination and collimation system based on LED source. Finally by using the detective part of double integrating spheres structure and the phase-locked amplifier technology, the signal was demodulated accordingly. The testing result shows that, by using the device, the absolute error of light transmittance is no more than 1% and that of haze is no more than 0.3%, which meet the precision requirement of engineering application. Moreover the repeatability of device was also good. The relative standard deviation of luminous transmittance and haze was 0.06 % and 0.05% respectively.