Adaptive hyperspectral imaging using structured illumination in a spatial light modulator-based interferometer.

Area of Science:

• Optics and Photonics
• Astronomy and Astrophysics
• Spectroscopy

Background:

• Hyperspectral imaging is crucial for analyzing celestial objects.
• Traditional systems can be bulky and lack real-time tunability.
• Space-based astronomical observations require compact, low-power instrumentation.

Purpose of the Study:

• To develop a novel, compact hyperspectral imaging system.
• To demonstrate real-time wavelength tunability for spectroscopic applications.
• To assess the system's suitability for space astronomy.

Main Methods:

• Utilized a spatial light modulator (SLM) in a Michelson interferometer setup.
• Employed structured illumination via a checkerboard phase mask on the SLM.
• Coupled a supercontinuum source to mimic solar emissions at 637.4 nm.

Main Results:

• Achieved a spectral resolution of 3.8 nm with a 30 nm bandwidth.
• Demonstrated a wavelength tunability of approximately 8 nm with 0.03 nm spectral sampling.
• Showcased real-time phase mask adaptation within tens of milliseconds.

Conclusions:

• The developed system is compact, potentially low-cost, and requires low power.
• Its real-time tunability and lack of moving parts are advantageous for near real-time spectroscopy.
• The system shows significant potential for space astronomy applications.