Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kazuo Fujiura0
Tadayuki Imai0
Masahiro Sasaura0
Kouichirou Nakamura0
Date of Patent
March 9, 2010
0Patent Application Number
105994520
Date Filed
June 22, 2005
0Patent Primary Examiner
Patent abstract
An optical medium having a high refractive index without anisotropy and a wide transmission wavelength is obtained. The cubic crystal material is αβO3, where α is at least one of K, Ba, Sr, Ca, and β is at least one of Ta, Ti. Optimally, the cubic crystal material is KTa1-xNbxO3, where composition x is 0≦x≦0.35. This composition enables to raise refractive index while its phase transition temperature is below a room temperature.
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