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Optical recording film and process for production thereof
| Details |
Inventors: Maeda, Koichi; Yamamoto, Hiroaki; Takigawa, Akio;
Assignee: Nippon Sheet Glass Co., Ltd. (Osaka, JP)
Primary Examiner: Angebranndt; Martin
Assistant Examiner:
Attorney, Agent or Firm: Wenderoth, Lind & Ponack, L.L.P.
There are disclosed the following three types of optical recording film: (1) an optical recording film comprising a gel having a network structure of an inorganic substance and a polymer which is from a photopolymerizable compound (A) and present in the network structure in the gel, said gel containing an optical recording-induced difference in the network structure. (2) an optical recording film, which consists essentially of a porous gel having a network structure of an inorganic substance, the porous gel containing recording-induced porosity differences in the network structure. (3) an optical recording film which consists essentially of a porous gel having a network structure of an inorganic substance or a gel obtained by densification of the porous gel, the porous gel or the gel having a recording-induced concavo-convex form on the surface thereof. |
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DETAILED DESCRIPTION It is an object of the present invention to provide an optical recording film which can be a hologram excellent in diffraction efficiency, resolution and transmittance.
It is another object of the present invention to provide an optical recording film excellent in heat resistance and environment resistance.
It is another object of the present invention to provide a process for the production of an optical recording film having the above excellent physical properties.
It is another object of the present invention to provide a film for optical recording to be used in the above production process, and a process for the production thereof.
It is further another object of the present invention to provide a composition useful for producing the above film for optical recording.
According to the present invention, there is provided an optical recording film (hereinafter referred to as the first optical recording film) comprising a gel having a network structure of an inorganic substance and a polymer which is from a photopolymerizable compound (A) and present in the network structure in the gel, said gel containing an optical recording-induced difference in the network structure of the gel.
Further, there is provided a film for optical recording, which comprises a gel having a network structure of an inorganic substance, a photopolymerizable compound (A) and a photoinitiator (B), the photopolymerizable compound (A) and the photoinitiator (B) being contained in the network structure.
Further, there is provided a process for the production of an optical recording film, which comprises recording optical data by exposing the above film for optical recording to actinic radiation.
Further, there is provided a composition containing a photopolymerizable compound (A), a photoinitiator (B), a metal compound (C) which is crosslinkable by self-hydrolysis when in contact with water and the subsequent polycondensation, a good solvent (D) for the above metal compound, water (E) and a catalyst (F) for the hydrolysis of the above metal compound
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Optical Systems 
