Imaging system for surgical lasers

Details Imaging system for surgical lasers Imaging system for surgical lasers

1988-02-10

1989-11-21

Dzierzynski, P. M.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351246, A61B 310

Patent

active

048818089

ABSTRACT:
An ocular imaging system for use with a surgical laser device comprises a light source radiating a beam which is coaxially aligned with the surgical laser beam. An aperture is place in the path of the beams to limit the quantity of light that can pass along the path. A steering mechanism is provided to move the coaxially aligned beams across the surface of the eye, and a confocal optical arrangement is provided to establish one of the beams' focal points at the aperture and the other as desired by the operator. Means are provided to detect the intensity of light reflected through the aperture and signal when this intensity surpasses a threshold value that is indicative of a specular reflection from the interface between tissues having different indices of refraction.

REFERENCES:
patent: 4053845 (1977-10-01), Gould
patent: 4161436 (1979-07-01), Gould
patent: 4503854 (1985-03-01), Jako
patent: 4517980 (1985-05-01), Tagnon
patent: 4561436 (1985-12-01), Munnerlyn
patent: 4579430 (1986-04-01), Bille
patent: 4598311 (1986-07-01), Bellina
patent: 4601288 (1986-07-01), Myers
patent: 4665913 (1987-05-01), L'Esperance, Jr.
patent: 4669466 (1987-06-01), L'Esperance
patent: 4704583 (1987-11-01), Gould
patent: 4781453 (1988-11-01), Kobayashi
U.S. Patent Application No. 706,619, in the Name of Bille, Filed Oct. 22, 1987, "Apparatus for, and Method of, Examining Eyes".
"FM-Laser Operation of the Nd:YAG Laser," by Kuizenga et al., IEEE Journal of Quantum Electronics, Nov. 1970.

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