# US 5,702,846 A · Photosensitive composition for volume hologram recording

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- Number: US 5,702,846 A
- Document ID: US5702846A
- Status: Granted
- Kind: A
- Application number: 08/808,546
- Filed: 1997-02-28
- Granted: 1997-12-30
- Earliest claimed: 1994-10-03
- Assignees: Nippon Paint Co., Ltd.
- Inventors: Akihiko Sato; Kenzo Mizutani; Masami Kawabata; Iwao Sumiyoshi
- Web page: https://patentgrep.com/patent/US5702846A

## CPC

- G03F 7/038: Macromolecular compounds which are rendered insoluble or differentially wettable (G03F7/075 takes precedence; macromolecular azides G03F7/012; macromolecular diazonium compounds G03F7/021)
- G03F 7/001: {Phase modulating patterns, e.g. refractive index patterns}
- G03F 7/0755: {Non-macromolecular compounds containing Si-O, Si-C or Si-N bonds (G03F7/0752 takes precedence)}
- G03H 1/02: Details {of features involved during the holographic process; Replication of holograms without interference recording}
- G03H 2001/026: {Recording materials or recording processes (G03H2226/11 takes precedence; corresponding details, see subgroups of G03H2260/00)}
- G03H 2260/12: Photopolymer
- G03F: PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR; (phototypographic composing devices B41B; photosensitive materials or processes for photographic purposes G03C; electrophotography, sensitive layers or processes therefor G03G)
- G03H: HOLOGRAPHIC PROCESSES OR APPARATUS (holograms, e.g. point holograms, used as ordinary optical elements G02B5/32; producing stereoscopic or other three-dimensional effects G02B30/00; diffraction-grating systems G02B27/44; systems using moiré fringes G02B27/60; optical logic elements G02F3/00; stereo-photography G03B35/00; photosensitive materials or processes for photographic purposes G03C; {stereo-photographic or similar processes G03C9/00}; apparatus for processing exposed photographic materials G03D; analogue computers performing mathematical operations with the aid of optical elements G06E3/00; authentication by radiation, of concealed information carried by holograms or diffraction gratings G06K19/16; holographic storage G11B7/0065, G11C13/04; {stereoscopic or other three dimensional effects in television systems H04N13/00})

## Abstract

The present invention provides a photosensitive composition for volume hologram recording, comprising the following components: (A) a cationic polymerizable compound and a radical polymerizable compound, (B) a cationic polymerization initiating material, and (C) a radical polymerization initiating material, as an essential component, wherein at least one of the cationic polymerizable compound and radical polymerizable compound of the component contains a siloxane group, and a difference in refractive index between the cationic polymerizable compound and radical polymerizable compound is not less than 0.01.

## Claims

### Claim 1

A photosensitive composition for volume hologram recording, which is used for recording interference fringes produced by the interference of a laser beam or a light having excellent coherence as fringes having different refractive indices, said composition comprising the following components:
(A) a cationic polymerizable compound and a radical polymerizable compound,
(B) a cationic polymerization initiating material, and
(C) a radical polymerization initiating material, wherein at least one of the cationic polymerizable compound and radical polymerizable compound have a siloxane group and are represented by the following: ##STR10## wherein at least one of X.sub.1 to X.sub.6 has a cationic polymerizable group at the terminal end and the remaining of X.sub.1 to X.sub.6 are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a dialkylamino group, a phenyl group or a hydroxyl group; and n is an integer of 1 to 7, and ##STR11## wherein at least one of X.sub.1 to X.sub.6 has a radical polymerizable group at the terminal end and the remaining of X.sub.1 to X.sub.6 are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a dialkylamino group, a phenyl group or a hydroxyl group; and n is an integer of 1 to 7.

### Claim 2 (depends on 1)

A photosensitive composition for volume hologram recording of claim 1, in which the polymerizable group and the silicon atom of the cationic polymerizable compounds or the radical polymerizable compounds are bound through an alkylene chain, an oxyethylene chain, an oxypropylene chain, a urethane chain or an amide chain.

### Claim 3 (depends on 1)

The photosensitive composition for volume hologram recording of claim 1, in which the cationic polymerizable group are selected from the group consisting of a glycidyl group, a cyclic ether, a cyclic sulfide, a cyclic imine, a cyclic disulfide, a lactone, a lactam, a cyclic formal, a cyclic imino ether and a vinyl ether.

### Claim 4 (depends on 1)

The photosensitive composition for volume hologram recording of claim 1, in which the radical polymerizable group contains an ethylenically unsaturated double bond.