Optical recording medium
AssigneeOlympus Optical Co., Ltd.
InventorsToshiyuki Kanno, Naoyuki Ueno, Seiji Kondo, Yasuji Nagata, Jun Kanehira, Hideshi Takahashi, Yoshiko Uematsu
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Abstract
An optical recording medium such as an optical disk, which is capable of reversibly repeating a recording/erasing cycle. This optical recording medium comprises a transparent substrate and recording layer formed on the substrate. This recording layer comprise a liquid crystalline high polymer having side chains and a dyestuff having a recording-light absorbing property. The side chain may preferably comprises mesogen group, a monocyclic or polycyclic compound such as phenyl, benzyl, naphthyl or anthryl group, and alkyl or aryl group having 1 to 18 carbon atoms.
Claims17
An optical recording medium which has no electrode layer and comprises:
- a transparent substrate;
- and
- a recording layer, formed on said transparent substrate, and comprising at least one type of a liquid crystal polymer compound having side chain groups provided with molecular rotation power or power of changing a state such as an agglomeration or an arrangement, and a dye compound having absorbing power for recording light,
- wherein upon radiation of recording light on said recording layer, affinity and association between the polymer compound and the dye compound are induced or dissociation and separation of the dye compound from the polymer compound are induced due to differences in chemical and physical characteristics such as a glass transition point and a melting point between the side chain groups of said polymer compound and said dye compound thereby to enclose said dye compound between regularly arranged side chain groups of said polymer compound and to change optical characteristics of the recording medium, thereby accumulating/erasing optical information and reading the optical information by utilizing the optical changes.
Dependencies are inferred from the claim text.