NORMALIZED SPECTRAL ANALYSIS FOR ENDOSCOPE ASSESSMENT

Abstract

Examples relate to methods and systems for evaluating near-infrared (NIR) performance of endoscopes. A method includes illuminating an endoscope's entrance pupil with a first radiant flux diffused through a first integrating sphere, the first radiant flux having a first spectrum, measuring a second radiant flux collected by a second integrating sphere at the exit pupil having a second spectrum, and determining transmission by comparing the spectra. The method includes determining a normalization factor for the second spectrum by finding the maximum value of a ratio of output scaled spectrum and input normalized spectrum. The method includes determining transmission through the endoscope as the ratio of the output normalized spectrum sum in an NIR region to the input normalized spectrum sum in the same NIR region.

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