Surgery – Instruments – Light application
Patent
1993-08-02
1994-04-19
Aschenbrenner, Peter A.
Surgery
Instruments
Light application
403365, 403120, A61B 1736
Patent
active
053041747
ABSTRACT:
An improved apparatus for manually manipulating a surgical laser beam is disclosed. The preferred embodiment of the invention includes a mirror nominally positioned at a 45 degree angle to the incident laser beam, a joy stick for manipulating the mirror, and a linkage interconnecting the two. The mirror is mounted to allow it to rotate about two mutually perpendicular and intersecting axes. The linkage operates to direct the reflected laser beam in two orthogonal dimensions such that a ratio between the movement of the reflected beam in each dimension is equivalent to the ratio of the movement of the joy stick in each dimension. This yields a reflected laser beam that moves a distance proportional to the amount of motion input to the joy stick. The reduction or amplification ratio between the input motion and the reflected laser beam motion remains constant, regardless of the direction of motion. In this manner, by moving the joy stick in a circular motion, the reflected laser beam also moves in a circular motion, rather than in an elliptical motion. A simplified joint that allows spherical rotation and axial translation between its two members is also disclosed. In the preferred embodiment, an adjustable hand rest is provided that moves out of the way when not in use.
REFERENCES:
patent: 2706126 (1955-04-01), Thiry
patent: 2910314 (1959-10-01), Klein
patent: 4129394 (1978-12-01), Eichinger et al.
patent: 4194850 (1980-03-01), Cranmore
patent: 4229839 (1980-10-01), Schwiemmer
Estrada Robert B.
Trost David
Aschenbrenner Peter A.
Coherent Inc.
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