Illumination system for indirect ophthalmoscope

Details Illumination system for indirect ophthalmoscope Illumination system for indirect ophthalmoscope

1977-08-15

1979-09-04

Sacher, Paul A.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

351 12, A61B 312

Patent

active

041666771

ABSTRACT:
The invention relates to a lighting appliance for generating a light beam for indirect ophthalmoscopy which appliance comprises a housing with a beam outlet aperture through which the beam leaves the housing and first and second means in the housing to respectively modify the color characteristics and the cross-section of the beam leaving the aperture. An externally accessible operating element is provided on the housing which can be independently adjusted to selectively control the first and second means.

REFERENCES:
patent: 3019699 (1962-02-01), Schenk
patent: 3439978 (1969-04-01), Moore et al.
patent: 3583795 (1971-06-01), Heine
patent: 3881812 (1975-05-01), Ben-Jovim

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