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. 05, 2002
Filed:
Feb. 28, 2001
Applicant:
Inventor:
Melvyn H. Kreitzer, Cincinnati, OH (US);
Assignee:
Corning Precision Lens Incorporated, Cincinnati, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 9/60 ; G02B 9/62 ; G02B 1/304 ;
U.S. Cl.
CPC ...
G02B 9/60 ; G02B 9/62 ; G02B 1/304 ;
Abstract
Projection lenses ( ) for use with pixelized panels (PP) are provided. The projection lenses have a negative first unit (U ) which has at least one aspheric surface and a positive second unit (U ) which has three subunits (U , U , U ) which have a positive/negative/positive configuration. The lens' aperture stop (AS) is located at the short conjugate end of the lens and is either in the third subunit (US ) or close to that subunit. The lenses are particularly well-suited for use in the manufacture of compact projection systems which employ side illumination of a reflective pixelized panel.