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:
Sep. 19, 1995
Filed:
Jul. 27, 1993
Akihiko Shiraishi, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A video camera equipped with an optical low-pass filter, which is to be arranged in front of a solid state imaging device. The optical low-pass filter comprises: a first sub-refractive plate adapted to separate an incident ray of light by a separation distance of d.sub.1 in a direction deviated 45.degree. clockwise or counterclockwise with respect to the horizontal scanning direction of the solid state imaging device; a second sub-refractive plate adapted to separate an incident ray of light by a separation distance of d.sub.2 in a direction parallel to the horizontal scanning direction of the solid state imaging device; and a third sub-refractive plate adapted to separate an incident ray of light by a separation distance of d.sub.1 in a direction perpendicular to the direction of separation of the first sub-refractive plate; wherein the second sub-refractive plate is arranged between the first and third sub-refractive plates; and wherein the condition: d.sub.1 >2d.sub.2 is satisfied.