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:
May. 19, 2009
Filed:
Oct. 15, 2007
Kara Yoshida, Koriyama, JP;
Tomoki Gunjima, Chikushino, JP;
Nobuhiko Takeshita, Koriyama, JP;
Yuzuru Tanabe, Tokyo, JP;
Hiroki Hotaka, Koriyama, JP;
Hiromasa Sato, Koriyama, JP;
Kara Yoshida, Koriyama, JP;
Tomoki Gunjima, Chikushino, JP;
Nobuhiko Takeshita, Koriyama, JP;
Yuzuru Tanabe, Tokyo, JP;
Hiroki Hotaka, Koriyama, JP;
Hiromasa Sato, Koriyama, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
To provide optical elements such as a phase plate suitably used in a broadband range and a polarizing diffraction element excellent in diffraction efficiency, a polymerizable liquid crystal composition to be used for them, and an optical head device using them. A polymerizable liquid crystal composition containing a polymerizable compound having a mesogen structure comprising the following condensed benzene ring group (A) and the following 6-membered cyclic group (B) bonded to at least one bond in the group (A) directly or via a connecting group —OCO— or —COO—, and a monovalent terminal group bonded to each of both terminals of the mesogen structure, at least one of the terminal groups being a monovalent organic group having a polymerizable moiety: