The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 09, 2010
Filed:
Jun. 22, 2005
Kazuo Fujiura, Atsugi, JP;
Tadayuki Imai, Atsugi, JP;
Masahiro Sasaura, Atsugi, JP;
Kouichirou Nakamura, Yokohama, JP;
Kazuo Fujiura, Atsugi, JP;
Tadayuki Imai, Atsugi, JP;
Masahiro Sasaura, Atsugi, JP;
Kouichirou Nakamura, Yokohama, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
An optical medium having a high refractive index without anisotropy and a wide transmission wavelength is obtained. The cubic crystal material is αβO, 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 KTaNbO, 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.