Translucent ceramic and method for manufacturing the same, and optical component and optical device
AssigneeMurata Manufacturing Co., Ltd.
InventorYuji Kintaka
Life of this patent
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Abstract
A translucent ceramic containing a main component represented by Ba{MxB1yB2z}vOw (wherein B1 is a trivalent metallic element, B2 is a quintavalent metallic element, M is at least one selected from the group consisting of Ti, Sn, Zr and Hf, x+y+z=1, 0≦x≦0.45, 1.00≦z/y≦1.04, 1.00≦v≦1.05, and w is a positive number required to maintain electroneutrality), or Ba{Mx(B1sB31-s)yB2z}vOw (wherein B3 is a bivalent metallic element, 0≦x≦0.9, 1.00≦z/y≦2.40, 0<s<1, and B1, B2, x+y Z and w are the same as those in the other formula). The translucent ceramic has a high refractive index, a high anomalous dispersion and excellent optical properties. The translucent ceramic is useful, for instance, as a material of an objective lens in an optical pickup.
Claims19
A translucent ceramic comprising a component having a general formula of Ba{Mx(A)yB2z}vOw, wherein M is at least one member selected from the group consisting of Ti, Sn, Zr and Hf, B2 is a pentavalent metallic element, x+y+z=1, 0≦x≦0.9, 1.00≦z/y≦2.40, 1.00≦v≦1.05, w is a positive number required to maintain electroneutrality, and A is B1 or (B1sB31-s) in which B1 is a trivalent metallic element, B3 is a bivalent metallic element and 0<s<1, provided that when A is B1, x≦0.45 and z/y≦1.04.
Dependencies are inferred from the claim text.