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Alternative linear microgrid polarimeters: design, analysis, and demosaicing considerations
Applied Optics
|July 15, 2021
Summary
New polarimeter designs using optimized polarizer angles and modulation patterns significantly improve performance over conventional microgrid systems. These advancements enhance bandwidth utilization for better polarized intensity measurements.
Area of Science:
- Optics and Photonics
- Image Sensors
- Polarimetry
Background:
- Linear division of focal plane (DoFP) polarimeters use microgrid patterns for polarized light measurement.
- Conventional designs employ a 2x2 pattern with {0,45,90,135}° polarizer angles.
- Alternative PxQ patterns offer improved frequency domain bandwidth utilization.
Purpose of the Study:
- To develop a comprehensive model for linear DoFP snapshot polarimeters.
- To understand device performance in spatial and frequency domains.
- To identify and evaluate novel modulation patterns for enhanced performance.
Main Methods:
- Developed a model for linear DoFP snapshot polarimeters.
- Related the model to generalized DoFP channeled polarimeter models.
- Performed empirical simulations using real polarimeter data and identified modulation schemes.
Main Results:
- Validated the developed DoFP polarimeter model.
- Identified practical modulation patterns with improved bandwidth usage.
- Demonstrated superior performance of alternative designs over conventional microgrids through simulations.
Conclusions:
- Optimized polarizer angles and modulation patterns enhance DoFP polarimeter performance.
- Improved bandwidth utilization is key to superior designs.
- Alternative DoFP designs offer significant advantages over conventional microgrid polarimeters.
