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:
Jun. 19, 2012
Filed:
Feb. 01, 2012
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 is formed by vacuum-sintering a molded body of ceramic particles having an average particle diameter of 1 μm or more and 10 μm or less and including LnAlO(Ln represents a rare-earth element, 1≦x≦10, and 1≦y≦5). Ln preferably includes at least one kind selected from La, Gd, Yb, and Lu. The optical element preferably has a refractive index of 1.85 or more and 2.06 or less, and an Abbe number of 48 or more and 65 or less. The obtained optical element has optical properties of high refractive index and low dispersibility.