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:
May. 05, 1992
Filed:
Oct. 16, 1989
Donald DeJager, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
An f-.theta. lens is disclosed which is particularly suitable for use with a color laser printer in which beams of different wavelengths are combined into a single combined beam. The combined beam is scanned by a rotating polygon onto a receiving medium. The f-.theta. is adapted to operate with optics for shaping the beam in a scan direction prior to the polygon and a cylindrical element after the f-.theta. lens to image the beam in a cross-scan direction onto the receiving medium. In order to provide an f-.theta. lens which is color corrected, the lens includes means for correcting in a scan direction for lateral color aberrations in each of the beams, and means for correcting in a cross-scan direction for axial color aberrations in each of the beams.