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:
Jan. 23, 1996
Filed:
Dec. 16, 1993
Applicant:
Inventor:
David P Hamblen, Rochester, NY (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ; B29D / ;
U.S. Cl.
CPC ...
359565 ; 264-132 ; 264-17 ; 264-21 ; 359566 ; 359570 ;
Abstract
Diffractive lenses having gradial zones (62, 70, 78, 90, 98, 106, 114) are formed by separately, sequentially spin casting and polymerizing successive radial zones of the lens to produce optical phase differences of 2.pi. between adjacent gradial zones. Diffractive lenses may be molded in plano-plano (60), plano-concave (68) and planoconvex (76) geometries and also may be combined with conventional plano-plano (84), convex-convex (92), plano-concave (100) and plano-convex (108) refractive lenses.