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. 28, 1993
Filed:
Aug. 23, 1991
Michael S Ferschl, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
An image forming apparatus uses a printhead including both writing optical fibers and an autofocus optical fiber. Radiation emitting from the fibers is imaged by a high numerical aperture lens on writing and focusing surfaces, respectively. Radiation from the autofocus fiber is reflected back through the lens to a split detector focus sensing device. To produce an adequate detection window for focusing, the numerical aperture of the autofocus fiber is chosen to be substantially less than the numerical aperture of the writing fibers and of the lens.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile