Single-shot compressive hyperspectral imaging with dispersed and undispersed light using a generally available...

Area of Science:

• Optics and Photonics
• Remote Sensing Technology
• Spectroscopy

Background:

• Hyperspectral cameras are valuable for remote sensing but often require scanning, limiting snapshot imaging capabilities.
• The coded aperture snapshot spectral imager (CASSI) offers simultaneous spatial and spectral data acquisition using a disperser.

Purpose of the Study:

• To propose a novel CASSI technique utilizing readily available diffraction gratings (Ronchi ruling and blazed grating).
• To enhance the CASSI technique by incorporating undispersed zeroth-order light.
• To experimentally validate the feasibility and performance of the proposed diffraction grating-based CASSI.

Main Methods:

• Development of a CASSI system employing a Ronchi ruling and a blazed grating as the disperser.
• Integration of zeroth-order light for potential performance improvement.
• Experimental setup for validating the proposed CASSI technique and identifying optimal grating parameters.

Main Results:

• Successful experimental validation of the proposed CASSI technique using diffraction gratings.
• Demonstration of improved snapshot spectral imaging capabilities compared to scanning methods.
• Identification of key grating parameters for optimizing CASSI performance.

Conclusions:

• The proposed CASSI technique using diffraction gratings is feasible and effective for snapshot spectral imaging.
• The integration of zeroth-order light offers a pathway for further performance enhancements.
• This advancement provides a more accessible and efficient solution for hyperspectral remote sensing.