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:
Apr. 24, 2007
Filed:
Feb. 23, 2004
Shiro Suyama, Tokyo, JP;
Munekazu Date, Saitama, JP;
Shigeto Kohda, Tokyo, JP;
Kinya Kato, Saitama, JP;
Shigenobu Sakai, Tokyo, JP;
Shiro Suyama, Tokyo, JP;
Munekazu Date, Saitama, JP;
Shigeto Kohda, Tokyo, JP;
Kinya Kato, Saitama, JP;
Shigenobu Sakai, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
An optical device includes a transparent material layer having a desired curved surface configuration, a layer including a variable refractive index material having a dielectric constant anisotropy, at least two transparent electrodes arranged to sandwich the transparent material layer and the variable refractive index material, and a driving device supplying a voltage including driving frequencies fand fbetween the transparent electrodes. The difference Δ∈ in the dielectric constant of the variable refractive index material due to the anisotropy is positive at one of the driving frequencies and negative at the other driving frequency.