Apparatus for examination and treating an eye

Details Apparatus for examination and treating an eye Apparatus for examination and treating an eye

1989-04-13

1991-03-19

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351221, A61B 310

Patent

active

050005600

ABSTRACT:
A coupling mirror (13) for coupling in a laser beam (14) is located in the optical axis of a slit illumination (4,7). A pair of prisms (11) is provided between this coupling mirror 913) and the tube objective (9) of the illumination tube (1), this pair of prisms spliting the light beam of the slit illumination up into two partial beams (12) situated at the side of the coupling mirror (13). As well the slit illumination as the laser beam are focused in a place (16) in the eye by a front objective (15). This design allows the use of a conventional illumination tube which may be rotated together with the slit diaphragm (7) in order to change the direction of the slit image in the eye. For all angular positions of the slit diaphragm a good brightness of the slit illumination is hereby achieved.

REFERENCES:
patent: 4669837 (1987-06-01), Schirmet et al.
patent: 4854693 (1989-08-01), Ichihashi et al.
patent: 4865441 (1989-09-01), Reis

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