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:
Oct. 04, 2005
Filed:
Apr. 29, 1997
Applicant:
Masatoshi Nagano, Tokyo, JP;
Inventor:
Masatoshi Nagano, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B007/00 ;
U.S. Cl.
CPC ...
Abstract
There is disclosed a video camera including a material element, arranged in a photographing optical system, for controlling the light transmission factor or amount, an image pickup element for receiving an optical image transmitted through the material element at the position of an imaging plane, and converting the optical image into an electrical signal, and a correction unit for correcting the light transmission factor wavelength dependency of the material element in accordance with the light transmission factor characteristics or light transmission amount characteristics of the material element.