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:
Dec. 25, 2012
Filed:
Mar. 31, 2011
Kohei Nakata, Utsunomiya, JP;
Michio Endo, Utsunomiya, JP;
Kentaro Doguchi, Utsunomiya, JP;
Shigeru Fujino, Kasuga, JP;
Kohei Nakata, Utsunomiya, JP;
Michio Endo, Utsunomiya, JP;
Kentaro Doguchi, Utsunomiya, JP;
Shigeru Fujino, Kasuga, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical element comprising a vacuum-sintered body comprising a plurality of particles each having a two-layer structure comprising a ceramic particle and a coating layer, wherein the ceramic particle comprises LnAlO, where Ln represents a rare-earth element, x represents 1≦x≦10, and y represents 1≦y≦5, and has an average particle diameter of 1 μm or more and 10 μm or less, and wherein the coating layer comprises a ceramic having a lower sintering temperature than a sintering temperature of the ceramic particle.