Snapshot hyperspectral fundus imaging system using a microlens array

Area of Science:

• Ophthalmology
• Medical Imaging
• Biomedical Engineering

Background:

• Retinal hyperspectral imaging (HSI) is crucial for early disease diagnosis by analyzing spectral signatures of biomarkers.
• Conventional HSI systems suffer from long acquisition times, causing motion artifacts due to involuntary eye movements.

Purpose of the Study:

• To develop a rapid snapshot hyperspectral fundus camera to overcome limitations of conventional HSI.
• To enable artifact-free retinal imaging for improved disease diagnosis.

Main Methods:

• A novel snapshot hyperspectral fundus camera utilizing a microlens array was designed.
• The system integrates a streamlined optical design compatible with commercial fundus cameras.
• It supports various field-of-view (FOV) options (20°, 35°, 50°) and offers tunable spectral resolution versus light throughput.

Main Results:

• The developed camera significantly reduces acquisition time compared to conventional HSI systems.
• The snapshot capability minimizes motion artifacts, enhancing image quality.
• The system's adaptability allows for diverse clinical applications.

Conclusions:

• The snapshot hyperspectral fundus camera represents a significant advancement in retinal imaging technology.
• This technology promises more accurate and efficient early disease diagnosis through improved spectral analysis.
• The system's flexibility and reduced artifacts pave the way for wider clinical adoption.