Translucent ceramic, method for manufacturing the same, optical component, and optical device
AssigneeMurata Manufacturing Co., Ltd.
InventorsSatoshi Kuretake, Yuji Kintaka
Life of this patent
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Abstract
A translucent ceramic having a high light transmittance is provided. It contains a perovskite compound having a composition represented by a general formula: (Ba1-s-tSrsCat)(MxB1yB2z)vOw (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 (2) of an optical pickup (9) to provide advantages. In another aspect some of M is replaced by Ti.
Claims20
A translucent ceramic comprising a perovskite compound having a composition represented by the general formula
- (Ba1-s-tSrsCat)(Tix1Mx2B1yB2z)vOw
- in which M is at least one of Sn, Zr and Hf, B1 is at least one of Mg, Zn, Y and In, B2 is at least one of Ta and Nb, 0≦s≦0.92, 0.01≦t≦0.40, 0≦x1;
- x1+x2+y+z=1, 0<x1+x2≦0.9, 0≦x2≦0.6, 1.00≦z/y≦2.40, and 0.97≦v≦1.04, and w is a positive number for maintaining electrical neutrality.
Dependencies are inferred from the claim text.