Infrared and Laser Engineering, Volume. 45, Issue 11, 1117008(2016)
Calibration of retardance deviation for DOLP measurement based spatial modulating spectropolarimeter
In order to insure the accuracy in linear polarimetry, a four-beam method was presented to calibrate the retardance of quarter wave plate. The method was based on spatial modulating optical structure, which was composed of quarter wave plate, combo birefringent wedge and polarizer. Variety of polarization measurement and polarization measuring accuracy was researched by simulation approach, when degree of circular polarization of target was changed. It was indicated that the measuring accuracy of Qi, Ui and degree of linear polarization were better than 10-3 with retardance calibration, when degree of linear and circular polarization is randomize between 0.1 to 0.2 and 0 to 0.2 respectively. Accuracy of polarization parameter measuring, except Qi, is about 14 times higher than those without retardance calibrating process.
Get Citation
Copy Citation Text
Zhang Qiao, Li Shuang, Liu Qiang, Gong Ping. Calibration of retardance deviation for DOLP measurement based spatial modulating spectropolarimeter[J]. Infrared and Laser Engineering, 2016, 45(11): 1117008
Category: 光电测量
Received: Mar. 5, 2016
Accepted: Apr. 15, 2016
Published Online: Jan. 20, 2017
The Author Email: