Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1993-08-19
1995-02-28
Sikes, William L.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351205, 351246, 359482, A61B 310, G02B 2702
Patent
active
053942019
ABSTRACT:
A binocular ophthalmoscope having a pair of eyepieces that are mounted in a frame and arranged to view a target area in the eye through a pair of angularly offset reflecting surfaces. The reflecting surfaces are seated on a carriage that is mounted for reciprocation in the frame. A mirror is pivotally mounted in the frame and arranged to direct a beam of light at the target area. A camming mechanism connects the mirror and the carriage so that the axis of the light beam and the axes of the image paths to the reflecting surfaces all move closer together as the carriage moves in one direction and moves further apart as the carriage moves in the opposite direction.
REFERENCES:
patent: 4449797 (1984-05-01), Kocher et al.
patent: 4568158 (1986-02-01), Blaha et al.
patent: 4684227 (1987-08-01), Schmidt et al.
patent: 4710002 (1987-12-01), Pomerantzeff
patent: 4810083 (1989-03-01), Okada et al.
patent: 5223863 (1993-06-01), Heine et al.
Parsons David R.
Sikes William L.
Welch Allyn Inc.
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