Illuminating optical device

Details Illuminating optical device Illuminating optical device

1991-10-08

1993-08-03

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351206, 351214, A61B 310

Patent

active

052333728

ABSTRACT:
An illuminating optical device includes a light source including two light emitting points which are symmetric with respect to an optical axis of the illuminating optical device, a first concave reflection mirror plane arranged behind the light source and symmetrically to the optical axis in order to form an image of the light source at a predetermined position of an illuminated area, and a second concave reflection mirror plane arranged more closely to the illuminated area than the first concave reflection plane and symmetrically to the optical axis in order to direct the light beam to the light emitting points of the light source.

REFERENCES:
patent: 4747030 (1988-05-01), Offner et al.
patent: 4820037 (1989-04-01), Kohayakawa et al.
patent: 4848896 (1989-07-01), Matsumoto
patent: 4952049 (1990-08-01), Matsumoto
patent: 5009498 (1991-04-01), Gersten et al.

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