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Characterization of a LED-Based Non-Mydriatic Hyperspectral Retinal Camera.

Francis Labrecque1, Maxime Jannaud1, Darvy Dang1

  • 1Centre for Eye Research Australia, Melbourne, Australia.

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Summary

A new non-mydriatic hyperspectral retinal camera was developed for advanced diagnostics. This system provides high-quality, repeatable retinal imaging with rapid acquisition times, paving the way for clinical integration.

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Area of Science:

  • Ophthalmic imaging technology
  • Medical device engineering
  • Spectral imaging systems

Background:

  • Advanced retinal diagnostics require high-resolution imaging capabilities.
  • Current systems may face limitations in speed, complexity, or non-mydriatic operation.
  • Hyperspectral imaging offers potential for detailed tissue characterization.

Purpose of the Study:

  • To develop a non-mydriatic hyperspectral retinal camera balancing performance, speed, and simplicity.
  • To create a practical system for advanced retinal diagnostics.
  • To enable high-content, non-invasive retinal imaging.

Main Methods:

  • Integrated LED illumination, linear variable filters, custom optics, and a monochrome sensor.
  • Utilized a motorized 3D stage for capturing hyperspectral data across 29 wavebands (450-850 nm).
  • Evaluated optical performance and performed in vivo imaging on human subjects for spectral signature capture and repeatability.

Main Results:

  • Achieved a 40° field of view with spectral resolution of 20-80 nm.
  • Demonstrated chromatic focal correction and uniform illumination across the spectral range.
  • Showcased in vivo capture of distinct spectral signatures and high repeatability (spectral variation <5%) with ~300 ms acquisition.

Conclusions:

  • The prototype offers reliable, repeatable hyperspectral retinal imaging in a compact, semi-automated design.
  • Provides a foundation for enhanced spectral precision, artifact reduction, and expanded field of view.
  • Enables non-invasive, high-content retinal imaging suitable for clinical workflows.