A Comprehensive Framework for the Development of a Compact, Cost-Effective, and Robust Hyperspectral Camera Using...

Area of Science:

• Optics and Photonics
• Remote Sensing Technology
• Spectroscopy

Background:

• Hyperspectral imaging (HSI) offers powerful material identification capabilities but faces adoption barriers due to cost, size, and durability issues.
• Lack of standardized protocols hinders the development of practical hyperspectral cameras for widespread use.

Purpose of the Study:

• To introduce a comprehensive framework for developing a compact, cost-effective, and robust hyperspectral camera.
• To improve the accessibility of HSI technology for researchers and engineers.

Main Methods:

• Utilized commercial off-the-shelf (COTS) components and a volume phase holographic (VPH) grism for an on-axis optical design.
• Integrated spectrograph design, optical simulations (ZEMAX OpticStudio), tolerance analysis, assembly, and performance assessment into a structured workflow.
• Employed a pushbroom scanning approach for hyperspectral image acquisition.

Main Results:

• Developed a prototype hyperspectral camera operating from 420-830 nm with 2 nm spectral resolution across 205 bands.
• Demonstrated effective differentiation of vegetation, water, and built structures, and resolution of atmospheric absorption features.
• Showcased material distinction capabilities even in low-light conditions.

Conclusions:

• The proposed framework provides a scalable and practical advancement in HSI technology, overcoming previous limitations.
• The developed compact, cost-effective, and robust hyperspectral camera enhances the accessibility and applicability of HSI for various scientific disciplines.