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:
Apr. 24, 1990
Filed:
May. 31, 1988
Robert W Easterly, Churchville, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A device (10) controls the focus in a film video player (11) for projection of at least a portion of a film image (F) onto a sensor (16) that generates a corresponding video signal from the sensor image. The film video player (11) has a fixed focal length lens (15) and includes a zoom motor (25) and related elements for changing the magnification of the sensor image with respect to the film image, sensor motor (34) and related elements for adjusting the focus of the sensor image, and a microprocessor (40) and related elements for determining the necessary adjustment to and for controlling the sensor motor to maintain the focus of the sensor image at any selected magnification without cam surfaces. Device (10) determines actual lens focal length upon power-up, eliminating focus variances due to manufacturing and installation, and maintains apparent zoom rate constant throughout the selected range of magnifications.