Abstract: In order to apply the polarization spectral intensity modulation (PSIM) technology to the fields of
outdoor polarization remote sensing, an integrated PSIM spectropolarimeter experimental prototype
is designed based on the laboratory principle model. First, a modulator consisting of a
Glan-Taylor prism and two quartz crystal retarders is integrated into a module. Then the
module is mounted on the head of the grating spectrometer to realize integrated hardware
design of the PSIM spectropolarimeter. Based on interactive data language (IDL), the
functions of file accessing , data processing and result displaying are integrated into
one unified interface to realize an integrated software design of the PSIM spectropolarimeter.
Finally, the measurement capability of the experimental prototype is verified by measuring
the whole Stokes vector element spectrum of horizontal and vertical linear polarized light,
and the polarization calibration of the experimental prototype is accomplished by using
polarization calibration system. Experimental data processing results show that experimental
prototype can synchronously achieve the whole Stokes vector element spectrum of the testing
light, and the maximum error between the measured results of the experimental prototype and
the theoretical output results is about 0.003 for the degree value of polarization in full
spectrum of the light from the polarization calibration box. It is indicated that the design
goal of integrated experimental prototype is realized.

Key words: polarization remote sensing, spectropolarimeter, polarization spectral intensity modulation, grating spectrometer