Combination lens system for retinal photocoagulator laser system

Details Combination lens system for retinal photocoagulator laser system Combination lens system for retinal photocoagulator laser system

1990-10-26

1992-12-15

Shay, David M.

Surgery

Instruments

Light application

606 13, 606 17, 359823, A61N 506

Patent

active

051712423

ABSTRACT:
A novel retinal photocoagulator is described, having a laser for generating a beam of laser radiation and a beam delivery system for delivering the laser beam to the surface of the retina. The delivery system includes a lens system for varying the spot size of the beam at the surface of the retina which is operable in two alternate modes over a given range of spot sizes, wherein one of the modes varies the size of the spot while maintaining the beam in a focused condition at the retina, and wherein the other mode varies the size of the spot at the retina by altering it focal point.

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patent: 4397310 (1983-08-01), Pomerantzeff
patent: 4538608 (1985-09-01), L'Esperance, Jr.
patent: 4576160 (1986-03-01), Tanaka
patent: 4628416 (1986-12-01), Dewey
patent: 4776335 (1988-10-01), Nakanishi et al.

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