Polarimetric-spectral intensity modulation (PSIM) technology can detect the polarimetric and spectral information of target simultaneously, which is quite useful in the realm of atmospheric detection, etc. The PSIM module consists of two multi-order waveplates and a polarizer. However, the multi-order waveplates are quite sensitive to the environmental temperature change, which could impact the detection precision of instruments severely. To solve this problem, the design strategy of athermalized PSIM technology is proposed. By gluing two different kinds of birefringent crystal, such as MgF₂ and quartz, the PSIM module can be insensitive to the temperature change. The experiment result shows that, with the change of environment temperature, the imaging spectropolarimeter can detect the polarimetric information of target precisely. The error of detected degree of polarimetric information can be reduced to 0.01, which confirms the detection precision of polarimetric information.

Date Published: 12 March 2019
PDF: 6 pages
Proc. SPIE 11023, Fifth Symposium on Novel Optoelectronic Detection Technology and Application, 110232C (12 March 2019); doi: 10.1117/12.2517177

Published in SPIE Proceedings Vol. 11023:
Fifth Symposium on Novel Optoelectronic Detection Technology and Application
Qifeng Yu; Wei Huang; You He, Editor(s)