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:
Nov. 13, 2001
Filed:
Nov. 23, 1999
Michael Harrigan, Webster, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A movie projection lens (,) for forming an image over the visible spectrum, at high magnification is disclosed. The movie projection lens (,) comprises in order, from a movie screen (,) side of the movie projection lens (,) a diffractive lens (,) with negative power, followed by a group (,) of positive (,) and negative (,) refractive lens elements with overall negative power. A diffractive lens (,) with positive power is followed by a group (,) of positive (,) and negative (,) refractive lens elements with overall positive power. The positive refractive group (,) is located adjacent to film (,) The positive power diffractive lens (,) has minimal affect on lateral chromatic aberration. The negative power diffractive lens (,) affects both lateral and axial chromatic aberration and has a greater affect on lateral aberration than on axial aberration.