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. 10, 1984
Filed:
Mar. 08, 1982
Mitsuhiro Tokuhara, Chigasaki, JP;
Masamichi Tateoka, Tokyo, JP;
Teruo Morikawa, Sagamihara, JP;
Akiyoshi Torigai, Machida, JP;
Tsutomu Toyono, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A projection device for projecting a first surface onto a second surface comprises a device for forming an image of the first surface on the second surface, a slit provided near the image forming device for making the quantity of light of the light beam on the second surface equal in each portion of the image, a device for moving the image forming device to vary the imaging magnification of the image of the first surface on the second surface, and a device for moving the slit, with movement of the image forming device, to a distance substantially equal to the distance by which the slit has been spaced apart from the image forming device before the image forming device is moved.