Claims
- 1. A process for producing a volume hologram which comprises
- irradiating a laser beam or a light having excellent coherence by which a radical photopolymerization initiator composition (c) is sensitized to record an interference fringe, and
- then, irradiating the entire hologram with a light having a wavelength which is different from that of the beam of the light having excellent coherence by which a cationic photopolymerization initiator composition (d) is sensitized, to the photosensitive composition for volume hologram recording applied on a transparent substrate, wherein said photosensitive composition comprises:
- (a) a cationic polymerizable compound which is liquid at ambient temperature;
- (b) a radical polymerizable compound which is different from said cationic polymerizable compound (a);
- (c) said radical photopolymerization initiator composition sensitized by a laser beam or a light having excellent coherence which has a specific wavelength to polymerize the ingredient (b); and
- (d) said cationic photopolymerization initiator composition which shows low photosensitivity to light having a specific wavelength and is sensitized by light having a wavelength other than said specific wavelength to polymerize the ingredient (a), wherein an average refractive index of the ingredient (a) is smaller than that of the ingredient (b).
- 2. The process according to claim 1, wherein the radical photopolymerization initiator composition contains a photosensitizer and an active radical-generating compound.
- 3. The process according to claim 2, wherein the sensitizer is cyanine dye.
- 4. The process according to claim 3, wherein the active radical-generating compound is a diaryliodonium salt.
- 5. The process according to claim 1, which further comprises a polymeric binder.
Priority Claims (2)
Number |
Date |
Country |
Kind |
3-085177 |
Apr 1991 |
JPX |
|
4-067021 |
Mar 1992 |
JPX |
|
Parent Case Info
This application is a divisional application of now abandoned application, Ser. No. 07/870,422, filed Apr. 17, 1992, now abandoned.
US Referenced Citations (18)
Foreign Referenced Citations (8)
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Jan 1990 |
JPX |
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Non-Patent Literature Citations (2)
Entry |
Abstract of JP 2-75617 Okawa et al (Mar. 1990). |
Abstract of JP 2-80422 Okawa et al. (Mar. 1990). |
Divisions (1)
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Number |
Date |
Country |
Parent |
870422 |
Apr 1992 |
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