Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1997-10-16
1999-01-19
Dang, Hung Xuan
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351215, 351221, A61B 310
Patent
active
058619399
ABSTRACT:
The system of the present invention allows the fundus of an undilated eye to be viewed extremely easily and without the need for the viewer to align a hand held unit with a head mounted unit. The system for viewing the fundus of an undilated eye in accordance with the present invention includes a number of point sources of light that are individually actuable and arranged in a linear array. A lens converts each point of light to a line of light. The point sources of light are sequentially actuated, i.e. turned on and off in sequence, so as to scan the fundus of the undilated eye with lines of light that are directed from the lens to the eye by an optical system. The optical system directs light reflected from the fundus to an image generating apparatus that is responsive to the reflected light to provide an image of the fundus that can be viewed.
REFERENCES:
patent: 4768874 (1988-09-01), Webb et al.
patent: 4877322 (1989-10-01), Hill
patent: 5576780 (1996-11-01), Yancey
Dang Hung Xuan
Odyssey Optical Systems, LLC
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