Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1986-06-05
1987-06-09
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351214, 351245, A61B 310
Patent
active
046716319
ABSTRACT:
A binocular opthalmoscope, having an optical viewing system, a light source and headgear mountable on an examiner's head during use for supporting the optical viewing system in optical alignment with the examiner's eyes and the light source with the output thereof above the optical viewing system. The light source has a selector for for selectively providing both full beam and slit beam illumination of a patient's eye, a first condensing lens for focusing light on the bull beam or slit beam aperture, a second condensing lens for refocusing the light passing through the aperture onto an aerial image of the retina, and a third lens for shortening the focal length of the beam emitted from the light outlet of the light source and which is mounting for pivotal movement into and out of the beam path.
REFERENCES:
patent: 2757574 (1956-08-01), Thorburn
patent: 3403957 (1968-10-01), Wilkinson
patent: 3582191 (1971-06-01), Cohen
patent: 3652153 (1972-03-01), Gambs
Fincham, "A Combined Hand Slit Lamp and Binocular Microscope", The Optician 1-29-1960 pp. 58-59.
The Exeter Indirect Opthalmoscope, Catalog Sheet.
Mentor Slit Lamps, Catalog Sheet.
Kowa SL-2 and SL-5 Slit Lamp Microscope, Catalog Sheet.
Bovernick Rodney B.
Dzierzynski D. M.
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