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:
Oct. 11, 2011
Filed:
May. 09, 2008
Takeshi Hayashi, Kyoto-Fu, JP;
Takeshi Hayashi, Kyoto-Fu, JP;
Murata Manufacturing Co., Ltd., Nagaokakyo-Shi, Kyoto-fu, JP;
Abstract
A translucent ceramic having a high linear transmittance and a high refractive index, substantially not causing double refraction, and exhibiting a high anomalous dispersion has a pyrochlore compound represented by the general formula ABO(wherein 1.00≦x/y≦1.10 and w represents a positive number maintaining electroneutrality) as a main component. The main component has a cubic crystal system. Preferably, the A site comprises a trivalent metallic element, and the B site comprises a tetravalent metallic element. More preferably, A is at least one of La, Y, Gd, Yb, and Lu, and B is of at least one of Ti, Sn, Zr, and Hf. The translucent ceramic is useful as a material of, for example, an objective lens used in an optical pickup.