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:
Jan. 06, 1998
Filed:
Feb. 02, 1996
Masunori Kawamura, Nagoya, JP;
Nidek Company, Ltd., , JP;
Abstract
An ophthalmic measuring apparatus is provided for automatically detecting blinking and insufficient fixation of an eye under examination, and the light reflected from the cornea, as well as for automatically correcting the variation of sensitivity of the apparatus without using any special calibration devices, in order to obtain highly reliable measurements. The apparatus comprising a laser beam projecting optical system for emitting and converging a laser beam to the crystalline lens of the eye and a scattered light detecting optical system for detecting light scattered by the protein molecules within the crystalline lens through a light-receiving optical system into a photoelectric transducer in order to measure the crystalline lens on the basis of the output signals of the photoelectric transducer.