A hyperspectral imager based on a Fabry-Perot interferometer with dielectric mirrors

Area of Science:

• Optics and Photonics
• Spectroscopy
• Imaging Systems

Background:

• Hyperspectral imaging provides detailed spectral information across a scene.
• Traditional imaging systems often rely on metallic mirrors, which can be costly and lossy.
• Fabry-Perot interferometers offer a tunable method for spectral selection.

Purpose of the Study:

• To introduce a new hyperspectral imager utilizing a Fabry-Perot interferometer.
• To demonstrate the system's performance using dielectric mirrors for improved cost and efficiency.
• To validate the imager's capability in capturing spectral data from various targets.

Main Methods:

• Construction of a hyperspectral imager centered around a Fabry-Perot interferometer.
• Incorporation of low-reflectivity dielectric mirrors instead of traditional metallic mirrors.
• Validation through the acquisition of hyperspectral data (hypercubes) of emitting and reflective objects.
• Comparison of acquired spectra against established reference spectra.

Main Results:

• Successful validation of the hyperspectral imager by measuring hypercubes of diverse scenes.
• Demonstrated performance in the visible spectral region.
• Achieved comparable or superior results to reference spectra.
• Highlighted advantages of dielectric mirrors: lower losses, reduced cost, and off-the-shelf availability.

Conclusions:

• The developed hyperspectral imager based on a Fabry-Perot interferometer with dielectric mirrors is a viable and cost-effective solution.
• The system demonstrates reliable performance for spectral analysis in the visible region.
• Dielectric mirrors present a significant advantage over metallic mirrors for this application.