研究目的
To present a spectral polarization measurement method for single-frame imaging that acquires spectral polarization information with high-speed acquisition using intensity modulation and compressive sensing.
研究成果
The method successfully acquires spectral polarization information of images with a single measurement, enabling high-speed acquisition. Numerical simulations show good recovery of Stokes parameters, with deviations attributed to spectral resolution and interpolation needs, indicating areas for future improvement.
研究不足
The deviation of individual recovery points is due mainly to low spectral resolution, and the intensity demodulation process requires interpolation. This topic will be the focus of further research.
1：Experimental Design and Method Selection:
The method integrates spectral polarization intensity modulation with a compressive sensing spectral imaging system. It uses intensity modulation to shift Stokes parameters to different frequency channels and employs the TwIST algorithm for reconstruction.
2：Sample Selection and Data Sources:
Numerical simulations are conducted, using a pixel as an example, with specified wave number range (15385–22220 cm?1), thicknesses (d1=
3：4 mm, d2=8 mm), and birefringence (Δn=01 for quartz crystal). List of Experimental Equipment and Materials:
Includes two multistage phase retarders (R1, R2), a linear polarizer (P), a coded aperture, a relay lens, dual Amici dispersive prisms, and a charge-coupled device (CCD) detector.
4：Experimental Procedures and Operational Workflow:
Incident light is modulated by R1, R2, and P; the modulated spectrum is encoded and compressed by the CASSI system; data is captured by CCD and reconstructed using the TwIST algorithm; Stokes parameters are demodulated from the reconstructed data.
5：Data Analysis Methods:
The TwIST algorithm is used for spectral image reconstruction, and inverse transformation with frequency channel interception is applied for polarization inversion.
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