Snapshot multispectral polarization imaging using a photonic crystal filter array

Area of Science:

• Photonics and Optical Engineering
• Image Processing
• Materials Science

Background:

• Snapshot multispectral polarization imaging requires specialized filter arrays and demosaicking algorithms.
• Existing methods may face limitations in spectral and polarization information recovery.

Purpose of the Study:

• To propose a novel filter array and demosaicking method for snapshot multispectral polarization imaging.
• To enable high-quality reconstruction of spectral and polarization information from single snapshots.

Main Methods:

• Fabrication of a photonic crystal filter array using the autocloning method with pixel-specific wave structure alterations.
• Development of a demosaicking algorithm based on a linear model for snapshot multispectral polarization imaging.
• Experimental evaluation using color charts to assess recovered spectrum error.

Main Results:

• Demonstration of a functional filter array based on a wavy multilayer photonic crystal structure.
• Successful demosaicking of multispectral polarization images, degree of linear polarization images, and polarized/non-polarized RGB images.
• Quantification of recovered spectrum error, validating the proposed method's accuracy.

Conclusions:

• The proposed photonic crystal filter array and demosaicking method effectively reconstruct multispectral polarization information.
• This approach offers a promising solution for advanced snapshot imaging applications requiring detailed spectral and polarization analysis.