Polarization modulation spectrum testing device and method for spectral analysis

The invention discloses a polarization modulation spectrum testing device and method for spectral analysis. The device comprises a diffuse reflection spectrum collection system, a reflection spectrumtesting accessory, a polarization angle modulation accessory, and a polarization degree modulation accessory. The reflection spectrum testing accessory comprises a sample table base, a sample table rotating base, an incident light azimuth angle adjusting supporting rod, a reflected light azimuth angle adjusting supporting rod, an incident light zenith angle adjusting knob and a reflected light zenith angle adjusting knob. According to the invention, three polarization modulation spectrum test accessories are provided, rapid establishment of a polarization angle modulation spectrum test system,a reflectivity linear polarization degree spectrum test system and a reflectivity polarization degree spectrum test system can be realized, and the cost and the device complexity of a polarization modulation acquisition syste