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:
Apr. 13, 1993
Filed:
Aug. 09, 1991
Kazuyuki Sasaki, Kanazawa, JP;
Nobuyuki Yano, Okazaki, JP;
Nidek Co., Ltd., Aichi, JP;
Abstract
A retroillumination image photographing apparatus of a crystalline lens in which an eye to be examined is projected by illumination light, and a crystalline lens is retroillumination with reflected light at an fundus of the illumination light, which includes: an alignment apparatus which aligns a photographing optical system of the retroillumination image photographing apparatus with a predetermined region of an eye to be examined; a storage apparatus which stores the position of the photographing optical system aligned by the alignment apparatus; and origin computing means which computes a specific region of the eye to be examined as an origin of an image pickup position of said photographing optical system based on the positional information of the storage apparatus; and detecting means which detects movement quantity of the image pickup position of the photographing optical system; and a display apparatus which displays the image pickup position of the photographing optical system based on the detection result of the detecting apparatus.