Rotating varifocal hyperspectral imaging system design method based on regularization band energy distribution.

Area of Science:

• Optics and Photonics
• Hyperspectral Imaging
• Diffractive Optics

Background:

• Moiré lenses provide compact, tunable zoom capabilities via diffractive effects.
• Wavelength-dependent characteristics limit Moiré lens application in hyperspectral imaging.
• Existing hyperspectral systems lack efficient achromatic zoom capabilities.

Purpose of the Study:

• To propose an end-to-end achromatic varifocal hyperspectral imaging system design.
• To overcome the limitations of Moiré lenses in hyperspectral applications.
• To achieve high-fidelity zooming and spectral reconstruction.

Main Methods:

• Integration of a diffractive optical element and Moiré lens.
• Development of an energy-weighted spectral reconstruction algorithm.
• System design enabling continuous focal tuning via lens rotation.

Main Results:

• Achieved continuous focal tuning from 20 to 40 mm.
• Demonstrated achromatic performance over the 420-660 nm wavelength range.
• Enabled high-fidelity zooming hyperspectral reconstruction.

Conclusions:

• The proposed system design successfully integrates Moiré lens technology with hyperspectral imaging.
• The developed method offers a viable solution for achromatic varifocal hyperspectral imaging.
• This advancement opens new possibilities for compact, tunable hyperspectral imaging systems.