Light field camera as a Fourier transform spectrometer sensor: instrument characterization and passive spectral...

Area of Science:

• Optics and Spectroscopy
• Hyperspectral Imaging
• Interferometry

Background:

• Traditional hyperspectral imaging often lacks precise distance measurement capabilities.
• Fourier transform spectrometers provide detailed spectral information but can be limited in spatial data acquisition.
• Integrating interferometry with spectral analysis offers potential for enhanced data dimensionality.

Purpose of the Study:

• To present a novel concept combining field cameras with Fourier transform spectrometers.
• To enable the generation of five-dimensional (position-angle-spectra) data cubes.
• To demonstrate passive ranging information for hyperspectral images.

Main Methods:

• Utilized a fixed optical path difference interferometer setup.
• Simultaneously observed shear and tilt fringes.
• Integrated field cameras with Fourier transform spectrometers to capture spectral and spatial data.

Main Results:

• Successfully produced five-dimensional data cubes.
• Achieved accurate measurements in both spectrum and distance.
• Demonstrated passive spectral ranging in both absorption and emission modes.
• Covered the 500-900 nm spectral bands.

Conclusions:

• The proposed system allows for thorough characterization of interferometers.
• Passive ranging information can be effectively added to hyperspectral images.
• This approach enhances the capabilities of remote sensing and spectral analysis.