Nondestructive methods were used to evaluate marketed fiber-optic endoscopes (intended for simple viewing) for fluorescence recording. Our application is for optical recording from the heart. For one angioscope, we measured a focal length of 0.33 mm, a field of view of 45°, an aperture of 0.26 mm, and an efficiency of 43%. We calculated that the angioscope would give a signal-to-noise ratio of 1.0 for a cardiac action potential, if its field of view were divided into a nine-pixel array (for safe continuous illumination). Our methods are useful in designing and evaluating fluorescence fiber-optic systems with superior signal quality and spatial resolution.
© 2002 Optical Society of America
(170.2150) Medical optics and biotechnology : Endoscopic imaging
(170.4580) Medical optics and biotechnology : Optical diagnostics for medicine
(170.5380) Medical optics and biotechnology : Physiology
(260.2510) Physical optics : Fluorescence
Soma Sau, Howard I. Bassen, and Victor Krauthamer, "Method for Evaluating Optical Characteristics of Endoscopes for Recording Fluorescence-Related Cardiac Electrical Activity," Appl. Opt. 41, 6725-6730 (2002)