The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 1998
Filed:
Aug. 07, 1996
Nikon Corporation, Tokyo, JP;
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.