OPTICAL ELEMENT AND IMAGING OPTICAL ELEMENT COMPRISING SAME

PROBLEM TO BE SOLVED: To provide an optical element made of opto-ceramic. SOLUTION: The refractive, transmissive or diffractive optical element is made of the opto-ceramic which comprises a composition expressed by the following formula and is composed of crystallites having a cubic crystal structur...

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Bibliographic Details
Main Authors OKANO YOSHIO, REICHEL STEFFEN, ZIMMER JOSE, PEUCHERT ULRICH, LETZ MARTIN, ALKEMPER JOCHEN, LENTES FRANK-THOMAS, HAYDEN JOSEPH S, BEIER WOLFRAM, WEINHOLD CARSTEN
Format Patent
LanguageEnglish
Published 26.04.2007
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:PROBLEM TO BE SOLVED: To provide an optical element made of opto-ceramic. SOLUTION: The refractive, transmissive or diffractive optical element is made of the opto-ceramic which comprises a composition expressed by the following formula and is composed of crystallites having a cubic crystal structure of the ZrO2type; (1-m)äz1[ZrO2]z2[HfO2](1-z1-z2)[X2O3]}m[A] or (1-m)äz1[ZrO2]z2[HfO2](1-z1-z2)[MO]}m[A], wherein: z1+z2 is less than or equal to 0.92 and preferably less than or equal to 0.90; z1, z2 and m are respectively higher than or equal to zero; m is less than 0.1 and preferably less than 0.06, most preferably close to or equal to zero; (X) is selected from Y, Sc, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; (M) is selected from Ca and Mg; and (A) represents one or more additional components particularly selected from SiO2, Na2O or TiO2. COPYRIGHT: (C)2007,JPO&INPIT
Bibliography:Application Number: JP20060250931