Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1984-05-03
1986-01-14
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351208, A61B 314
Patent
active
045642737
ABSTRACT:
A retinal camera wherein an auxiliary lens is provided so as to be free to be let into and out of a light path between the position of an image of a retina formed by an objective and a relay lens so that the front eye part of an eye to be examined can be illuminated brightly and uniformly and an image of the front eye part of a high resolution can be obtained at a high magnification. The auxiliary lens has a negative or positive refracting power. The auxiliary lens having a negative refracting power is let into and out of the light path together with an image rotator so that the image of the front eye part can be observed as an erected image.
REFERENCES:
patent: 1561583 (1925-11-01), Bash
patent: 3936844 (1976-02-01), Matsumura
patent: 4196979 (1980-04-01), Kohayakawa et al.
patent: 4264153 (1981-04-01), Ito
Iba Youich
Inaba Kouji
Bovernick Rodney B.
Dzierzynski Paul M.
Olympus Optical Co,. Ltd.
LandOfFree
Retinal camera does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Retinal camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Retinal camera will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-428262