Invention Grant
- Patent Title: Liquid crystal optical modulation element and optical head device
- Patent Title (中): 液晶光调制元件和光头装置
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Application No.: US12910032Application Date: 2010-10-22
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Publication No.: US08007877B2Publication Date: 2011-08-30
- Inventor: Kara Yoshida , Yuriko Kaida , Hiromichi Nagayama , Hiroshi Kumai
- Applicant: Kara Yoshida , Yuriko Kaida , Hiromichi Nagayama , Hiroshi Kumai
- Applicant Address: JP Tokyo
- Assignee: Asahi Glass Company, Limited
- Current Assignee: Asahi Glass Company, Limited
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2005-302812 20051018
- Main IPC: C09K19/38
- IPC: C09K19/38 ; C09K19/54 ; C09K19/34 ; C09K19/20 ; C09K19/12 ; G02F1/13 ; G11B7/135
Abstract:
To provide a liquid crystal optical modulation element which is excellent in durability against blue laser and which can maintain the characteristics for a long period of time.A liquid crystal optical modulation element to modulate a laser beam having a wavelength of at most 500 nm, which comprises a layer of a polymer liquid crystal composition sandwiched between a pair of transparent substrates facing each other, characterized in that each of the pair of transparent substrates has an alignment film on the surface which faces the other transparent substrate, and the polymer liquid crystal composition is a polymer liquid crystal containing a hindered amine compound and a hindered phenol compound.
Public/Granted literature
- US20110037910A1 LIQUID CRYSTAL OPTICAL MODULATION ELEMENT AND OPTICAL HEAD DEVICE Public/Granted day:2011-02-17
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