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. 09, 1999
Filed:
Jun. 09, 1997
Akira Yamada, Yokohama, JP;
Keiji Nagata, Yokohama, JP;
Yoshiaki Irie, Yokohama, JP;
Akihiko Nagano, Ichihara, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical apparatus including a detecting unit for detecting sight line direction of a human eye, a correcting data forming unit, electrically connected to the detecting unit, for forming correcting data as to personal difference of a human eye, a visual mark presenting unit electrically coupled to the correcting data forming unit for presenting a plurality of focus point detecting frames for sampling correcting data at different positions in a visual field and being capable of flickering and lighting without flickering, and a control unit for controlling the apparatus on the basis of the sight line direction and the correcting data.