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:
Nov. 13, 2007
Filed:
Mar. 09, 2005
Yuji Kintaka, Omihachiman, JP;
Yuji Kintaka, Omihachiman, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
A translucent ceramic principally contains a composition represented by the formula Ba{TiM(MgZn)(TaNb)}O, wherein M is at least one selected from the group consisting of Sn, Zr, and Hf; w is a positive number for maintaining the electrical neutrality; x+x+y+z=1; 0.015≦x+x≦0.90; 0<x≦0.90; 0≦x≦0.60; 1.60≦z/y≦2.40; 1.00≦v≦1.05; 0<t<1; and 0≦u≦1. The translucent ceramic has high linear transmittance over a wide wavelength range and a large refractive index, is controllable in refractive index and Abbe number in a wide range, and is not birefringent. Therefore, lenses () made of the translucent ceramic are suitable for optical pickups () and other devices that must be small-sized and thin.