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:
Jun. 17, 2008
Filed:
Aug. 03, 2006
Yoshiharu Ooi, Chiyoda-ku, JP;
Hiromasa Sato, Koriyama, JP;
Ryuichiro Shimizu, Koriyama, JP;
Takuji Nomura, Koriyama, JP;
Yuzuru Tanabe, Chiyoda, JP;
Mitsuo Oosawa, Koriyama, JP;
Yoshiharu Ooi, Chiyoda-ku, JP;
Hiromasa Sato, Koriyama, JP;
Ryuichiro Shimizu, Koriyama, JP;
Takuji Nomura, Koriyama, JP;
Yuzuru Tanabe, Chiyoda, JP;
Mitsuo Oosawa, Koriyama, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
A liquid crystal lens element having a lens function is provided, which is small sized without having moving part, and which can stably carry out correction of spherical aberration containing a power component corresponding to focal point change of incident light. A liquid crystal lens element which changes a focal length of light transmitted through a liquid crystalaccording to the magnitude of the voltage applied to the liquid crystalsandwiched between a pair of transparent substratesand, which comprises transparent electrodesandprovided on the respective transparent substratesandfor applying a voltage for the liquid crystal, and a concave-convex portionhaving a saw-tooth-shaped cross-sectional shape having a rotational symmetry about an optical axis and formed on one surface of the transparent electrodewith a transparent material, wherein at least concave portions of the concave-convex portionare filled with the liquid crystalso as to change the substantial refractive index of the liquid crystalaccording to the magnitude of applied voltage.