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:
Jul. 16, 1985
Filed:
Dec. 06, 1982
Applicant:
Inventor:
Yu Yamada, Kokubunji, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350445 ; 350-64 ;
Abstract
An image rotating optical system provided with an imaging optical element for forming an image, an image rotating optical element rotatable about the optical axis of the imaging optical element to rotate the light beam therefrom, and a light shield element positioned between the imaging optical element and the image rotating optical element and rotatable about the optical axis with the rotation of image rotating optical element, to correct the unevenness in the illuminance caused by the image rotating optical element.