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:
Jul. 08, 2008
Filed:
Sep. 10, 2007
Satoshi Kuretake, Yasu, JP;
Yuji Kintaka, Omihachiman, JP;
Satoshi Kuretake, Yasu, JP;
Yuji Kintaka, Omihachiman, JP;
Abstract
A translucent ceramic having a high light transmittance is provided. It contains a perovskite compound having a composition represented by a general formula: (BaSrCa)(MB1B2)O(where M contains at least one of Sn, Zr and Hf, B1 represents at least one of Mg, Zn, Y and In, B2 represents at least one of Ta and Nb, each of conditions of 0≦s≦0.99, 0.01≦t≦0.45, x+y+z=1, 0<x≦0.9, 1.00≦z/y≦2.40, and 0.97≦v≦1.05 is satisfied, and w represents a positive number for maintaining electrical neutrality) as a primary component. This translucent ceramic can be used as, for example, an objective lens () of an optical pickup () to provide advantages. In another aspect some of M is replaced by Ti.