Steven E Murray

US Patent:

54306205, Jul 4, 1995

Filed:

Oct 8, 1993

Appl. No.:

8/134262

Inventors:

Kenneth Li - Arcadia CA
Steven Murray - Menlo Park CA
Zafirios Gourgouliatos - Los Angeles CA
Douglas M. Brenner - Los Angeles CA

Assignee:

Cogent Light Technologies, Inc. - Santa Clarita CA

International Classification:

F21V 800

US Classification:

362 32

Abstract:

The present invention provides a compact surgical headlamp capable of dynamic adjustment of the resulting field of illumination, comprising at least a single core fiber optic delivery light guide, an adjustable light projection system, and a mounting mechanism for movably supporting the headlamp proximate to the surgeon's eyes. A receiving block is also provided for supporting the structure of the projection system and for coupling the delivery fiber thereto. The projection system comprises a cylindrical housing mount adapted with a centrally disposed cylindrical cavity for receiving the ferruled, output end of the delivery fiber and for allowing the light output therefrom to initially diverge within the cavity of the housing mount. An outside surface of the housing mount is threaded for screwable reception of a correspondingly threaded, cylindrical lens housing, with a field lens disposed at a distal end of the lens housing such that the lens is movable back and forth along the optical axis of the delivery fiber by screwing the lens housing on and off of the housing mount. The enclosed cavity collects the more divergent light rays and redirects them toward the output endface of the lens so as to produce a concentrated light beam which defines a smaller solid angle of divergence.