Sensitivity analysis of a multibranched light guide for real time hyperspectral imaging systems

Area of Science:

• Spectroscopy
• Optical Engineering
• Medical Imaging

Background:

• Hyperspectral imaging (HSI) captures detailed spectral information for various applications.
• Previous work developed a prototype excitation-scanning hyperspectral imaging (HIFEX) colonoscope system.
• The prototype's imaging speed was limited by optical transmission losses in its solid light guide.

Purpose of the Study:

• To analyze and optimize the solid light guide of an HSI colonoscope prototype.
• To improve optical intensity throughput for faster spectral scanning.
• To enhance real-time endoscopic screening capabilities.

Main Methods:

• In-depth analysis of solid light guide parameters: LED intensity, geometry, and light propagation.
• Utilized Monte Carlo ray tracing simulations (TracePro) for optical modeling.
• Evaluated parameters including LED focusing, bend radii, and branch merging.

Main Results:

• Simulations identified key factors for optimizing light guide transmission.
• LED focusing lenses, optimized bend radii, and smooth branch merges significantly improve throughput.
• The study provides a framework for fabricating an improved light guide.

Conclusions:

• Optical transmission in branched light guides can be significantly enhanced through design optimization.
• Optimized light guides are crucial for improving the speed and efficacy of HSI endoscopic systems.
• This research lays the groundwork for next-generation real-time molecular detection in endoscopic procedures.