New system for characterizing the light distribution of optical fiber diffusers for photodynamic therapy applications

Rebecca Lynn Kozodoy; James A. Harrington; Scott L. Lundahl

doi:10.1117/12.180705

28 July 1994 New system for characterizing the light distribution of optical fiber diffusers for photodynamic therapy applications

Rebecca Lynn Kozodoy, James A. Harrington, Scott L. Lundahl

Author Affiliations +

Proceedings Volume 2131, Biomedical Fiber Optic Instrumentation; (1994) https://doi.org/10.1117/12.180705
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

A novel technique for quantitatively examining the 3-D light distribution from optical fiber diffusers was developed. This system provides a rapid and sensitive method for characterizing light output, while remaining easily adaptable to a variety of tip configurations. We have used this technique to evaluate the longitudinal and azimuthal uniformity of the light output from cylindrical diffusing tips as well as the output distributions of spherical and microlens diffusers. Upon considering the clinical requirements of the cylindrical diffuser tips, we have determined a configuration which yields a realistic and informative view of the light output. As an example of the sensitivity and accuracy of this method, the mode-dependence of the output intensity distribution of cylindrical optical fiber diffusers was investigated by examining the effect of bending the fibers. The precision and reproducibility of this characterization scheme allow it to be a valuable tool not only for evaluating existing diffusers, but for assisting in the development of improved fiber optic diffusers.

Citation Download Citation

Rebecca Lynn Kozodoy, James A. Harrington, and Scott L. Lundahl "New system for characterizing the light distribution of optical fiber diffusers for photodynamic therapy applications", Proc. SPIE 2131, Biomedical Fiber Optic Instrumentation, (28 July 1994); https://doi.org/10.1117/12.180705

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