Stock material or miscellaneous articles – Liquid crystal optical display having layer of specified...
Reexamination Certificate
2010-11-23
2011-10-18
Wu, Shean (Department: 1722)
Stock material or miscellaneous articles
Liquid crystal optical display having layer of specified...
C252S299630, C252S299670, C349S002000, C560S076000, C369S100000, C369S112010
Reexamination Certificate
active
08039064
ABSTRACT:
A compound having a good durability against light and capable of producing desired liquid crystallinity after polymerization, and a polymerizable liquid crystal composition containing such a compound, are provided. Further, an optical element having a good durability against light, and an optical information writing/reading device employing such an element, are provided.A compound represented by CH2═CR1—COO—R2-Cy-Ph-R3—OCO—CR4═CH2. R1and R4are each preferably a hydrogen atom. R3is preferably a C1-6alkylene group wherein an oxygen atom is present or not present at an end of the group to be bonded to a cyclic group, and wherein some or all of hydrogen atoms bonded to carbon atoms in the group may be substituted by fluorine atoms; or an alkylene group wherein an oxygen atom is present at an end of the group to be bonded to a cyclic group. A diffraction grating2produced by employing this liquid crystal compound has a good durability against light, and accordingly, it is possible to constitute an optical information writing/reading device suitable for large capacity recording by employing a blue laser as a light source1.
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Konishi Teppei
Kumai Hiroshi
Takeshita Nobuhiko
Asahi Glass Company Limited
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Wu Shean
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