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. 29, 2012
Filed:
Sep. 23, 2010
Applicant:
Tomohiko Ishibashi, Utsunomiya, JP;
Inventor:
Tomohiko Ishibashi, Utsunomiya, JP;
Assignee:
Canon Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical element Ggiincludes a medium that has a refractive index distribution. This optical element satisfies conditions of |θgF(pmax)−θgF(pmin)|≧0.02, |ΔθgFgi(p1)|≧0.0272,|Δθgdgi(p1)|≧0.0250, and |θgFgi(pmaxgi)−θgFgi(pmingi)|≦0.1.