Fiberoptic spherical diffuser

Details Fiberoptic spherical diffuser Fiberoptic spherical diffuser

1994-07-13

1995-07-04

Pellegrino, Stephen C.

Surgery

Instruments

Light application

606 15, A61B 1732

Patent

active

054296358

ABSTRACT:
A fiberoptic diffuser for photodynamic therapy applications comprises an optical fiber having a light transmitting core, cladding about the core, and a buffer layer about the cladding. The distal end portion of the fiber core is free from the cladding and buffer layer, and the exposed distal end of the core has a conical configuration. A cap extends about the distal end portion of the fiber and has a spheroidal end portion of light diffusing material which extends about the exposed conical end of the fiber core. The cap also has a mounting portion engaged with the buffer layer of the fiber, and it provides a cavity in which the exposed core is disposed. Light rays passing through the fiber to its distal end are refracted outwardly at the conical end of the core into the spheroidal end portion of the cap and are further refracted by the cap to exit therefrom over substantially the entire surface of the spheroidal end portion.

REFERENCES:
patent: 4736743 (1988-04-01), Daikuzono
patent: 5054867 (1991-10-01), Wagnieres et al.
patent: 5074632 (1991-12-01), Potter
patent: 5078711 (1992-01-01), Kakami et al.

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