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:
Dec. 18, 1984
Filed:
Dec. 30, 1982
Tsuneo Takagi, Kurita, JP;
Dainippon Screen Seizo Kabushiki Kaisha, Kyoto, JP;
Abstract
A method and machine for automatic focusing in a projection system with continuously variable magnification, wherein an original picture is projected onto a photosensitive material by a focusing lens, wherein one of these three members is fixed and the other two members are moved in a direction of a light axis by moving means, wherein the positions of the two moving members are detected by detectors, and wherein control means controls that, when the magnification of a picture image is changed, one moving member having a larger moving rate than that of the other moving member is moved ahead of the other moving member and the other moving member is moved dependent on the one moving member so that the picture image projected may constantly be focused onto the photosensitive material.