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. 26, 2009
Filed:
Apr. 08, 2008
Yuji Kintaka, Omihachiman, JP;
Yuji Kintaka, Omihachiman, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
A translucent ceramic includes a perovskite-type compound as a main component having a composition represented by the general formula (La(SrBaCa))((AlGa)(TaNb))O(wherein 0<x≦1, 0<y≦0.6, 0.4≦y/x≦0.6, 0≦a≦1, 0≦b≦1, 0≦c≦1, 0≦d≦1, 0.9≦v≦1.1 and w is a positive number for keeping an electrical neutrality). The translucent ceramic has a high refractive index and a large Abbe number. Therefore, the translucent ceramic has an advantage in correction of aberration and is preferably used for lenses, which are disposed so as to hold a diaphragm therebetween, in a Gauss lens optical system such as an optical system for a single-lens reflex camera.