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:
Dec. 26, 2000
Filed:
Dec. 22, 1999
Akinari Takagi, Tokyo, JP;
Kouji Nishio, Tokyo, JP;
Kabushiki Kaisha Topcon, Tokyo, JP;
Abstract
A corneal endothelial cell photographing apparatus comprises a first slit plate provided with a slit, a photographing light projecting optical system for obliquely projecting photographing light for photographing a corneal endothelial cell of an eye to be tested through the slit of the first slit plate on the eye, an observation light projecting optical system for projecting observation light through the slit of the first slit plate on the eye for observation prior to photographing the corneal endothelial cell of the eye, an observing and photographing optical system for guiding the observation light reflected from the cornea of the eye and the photographing light reflected from the cornea of the eye to an image pickup device for the observation and photographing of the corneal endothelial cell of the eye, a second slit plate provided with a slit narrower than that of the first slit plate, and a Z-alignment measuring light projecting optical system for projecting alignment measuring light through the slit of the second slit plate on the eye to measure the position of a main unit of the corneal endothelial cell photographing apparatus relative to the eye with respect to directions along the optical axis of the eye.