Robust snapshot interferometric spectropolarimetry.

Area of Science:

• Optics and Photonics
• Spectropolarimetry
• Optical Measurement

Background:

• Accurate spectral Stokes vector measurement is crucial for characterizing anisotropic materials.
• Existing methods often struggle with speed, accuracy, and robustness to object pose variations.

Purpose of the Study:

• To develop a novel snapshot interferometric common-path spectropolarimeter.
• To enable rapid and accurate spectral Stokes vector measurement of transmissive anisotropic objects.
• To achieve robustness against 3D object pose variations.

Main Methods:

• Utilized a snapshot interferometric common-path spectropolarimeter with a polarization-modulation module.
• Extracted spectral polarimetric parameters Ψ(k) and Δ(k) in the spectral domain.
• Designed the system with the object placed outside the interferometric module for pose robustness.

Main Results:

• Successfully extracted the spectral Stokes vector of a transmissive anisotropic object.
• Achieved high accuracy in spectral polarimetric parameter extraction.
• Demonstrated the system's feasibility through experimental verification.
• Enabled measurement within tens of milliseconds.

Conclusions:

• The proposed snapshot spectropolarimeter provides an accurate and robust method for spectral Stokes vector measurement.
• The system's design allows for rapid analysis of anisotropic objects, overcoming limitations of previous techniques.