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US 4,173,474 AGranted
Hologram and method of production using two solvent treatments
AssigneeCanon Kabushiki Kaisha
InventorsTakashi Tanaka, Katsuhiko Nishide
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Abstract
A hologram comprises a polymer carrier and a portion composed of a polymerization product of a photopolymerizable monomer contained in the polymer carrier, and the polymerization product is produced by exposing the carrier polymer containing the photopolymerizable monomer to an interference pattern of radiation.
Claims9
A method of producing a hologram comprising:
- (A) a first step wherein a sensitive member is prepared by dispersing a photopolymerizable substance into a polymer by which a carrier is formed,
- (B) a second step of exposing said member to an interference pattern of radiation rays,
- (C) a third step of contacting the exposed sensitive member with a first solvent capable of providing a difference in swelling in accordance with the interference pattern formed in the sensitive member, and
- (D) a fourth step of contacting the exposed sensitive member with a second solvent which is miscible with the first solvent, but relatively weak in swelling action to the sensitive member whereby a hologram having an unexpectedly high diffraction efficiency relative to the thickness of the sensitive member is formed.
1 more element
A hologram produced by
- (A) a first step wherein a sensitive member is prepared by dispersing a photopolymerizable substance into a polymer by which a carrier is formed,
- (B) a second step of exposing said member to an interference pattern of radiation rays,
- (C) a third step of contacting the exposed sensitive member with a first solvent capable of providing a difference in swelling in accordance with the interference pattern formed in the sensitive member, and
- (D) a fourth step of contacting the exposed sensitive member with a second solvent which is miscible with the first solvent, but relatively weak in swelling action to the sensitive member whereby a hologram having an unexpectedly high diffraction efficiency relative to the thickness of the sensitive member is formed.
1 more element
Dependencies are inferred from the claim text.