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:
Nov. 19, 1996
Filed:
Nov. 28, 1994
Applicant:
Inventor:
Akira Akashi, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
396 51 ;
Abstract
The present invention relates to an optical apparatus, which comprises a photoelectric conversion device for converting reflected light from an eye into an electric signal, and a calculating device for calculating a direction of a visual axis of the eye using the electric signal and correction data, wherein the calculating device obtains the correction data using an electric signal obtained from the photoelectric conversion device when the eye keeps directed to a specific portion in the field of view during an ordinary operation of the optical apparatus.