Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1996-08-07
1998-09-01
Mai, Huy
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351214, A61B 310
Patent
active
058018077
ABSTRACT:
This invention provides a microscope for operation which can form a black point for protecting a patient's retina even when the retina part is not at the center of the field of view of the microscope. The microscope for operation has an X-Y stage for moving the microscope body, a CCD camera for obtaining an image in the field of view of the microscope, a liquid crystal device provided with a light transmitting surface transmitting illuminating light therethrough and comprised of display dots disposed in the form of a matrix, and a control device for controlling and driving the liquid crystal device. The control device analyzes the image in the field of view of the microscope obtained by the CCD camera to thereby recognize the position of the retina part of an eye to be examined, and the display dots positioned in that area on the light transmitting surface of the liquid crystal device which has been determined correspondingly to the recognized position are selectively colored to thereby constitute a black point filter.
REFERENCES:
patent: 5512965 (1996-04-01), Snook
patent: 5555040 (1996-09-01), Kaneko
Kaneko Masanobu
Satake Eiji
Tomioka Ken
Mai Huy
Nikon Corporation
LandOfFree
Ophthalmic illumination device having adjustable transmittance m does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ophthalmic illumination device having adjustable transmittance m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ophthalmic illumination device having adjustable transmittance m will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-275466