Translucent ceramic, method for producing the same, optical...

Details Translucent ceramic, method for producing the same, optical... Translucent ceramic, method for producing the same, optical...

2008-05-09

2011-10-11

Speer, Timothy (Department: 1784)

Stock material or miscellaneous articles

Composite

Of inorganic material

C428S702000, C428S432000, C428S472000

Reexamination Certificate

active

08034468

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 AxByOw(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.

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