Holographic optical element and method for producing the same
AssigneeKonica Minolta, Inc.
InventorsSaburou Hiraoka, Kenichi Onaka, Daisuke Watanabe, Yuya Kubo, Kishio Tamura
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Abstract
The present invention provides a means for suppressing an occurrence of a ghost by enhancing diffraction efficiency of a holographic optical element having a volume hologram recording layer. The present invention is a holographic optical element including: a volume hologram recording layer containing a photopolymer; and at least one adjacent layer which is in contact with the volume hologram recording layer and contains a resin, wherein a diffraction grating is formed so as to extend from the volume hologram recording layer to the adjacent layer.
Claims14
A holographic optical element comprising:
- a volume hologram recording layer comprising a photosensitive layer containing a polymerizable monomer;
- and
- at least one adjacent layer which is in contact with the volume hologram recording layer and contains a resin,
- wherein a diffraction grating is formed so as to extend from the volume hologram recording layer to the adjacent layer;
- wherein the photosensitive layer is formed by coating a photosensitive composition containing a polymerizable monomer on the adjacent layer followed by drying;
- and
- wherein a holographic exposure is carried out for the photosensitive layer in a state in which part of the photosensitive composition of the photosensitive layer has infiltrated the adjacent layer.
A method for producing a holographic optical element, comprising, after forming a photosensitive layer containing a polymerizable monomer on an adjacent layer containing a resin, performing holographic exposure for the photosensitive layer to form a volume hologram recording layer;
- wherein the photosensitive layer is formed by coating a photosensitive composition containing the polymerizable monomer on the adjacent layer followed by drying;
- and
- wherein the holographic exposure is carried out for the photosensitive layer in a state in which part of the photosensitive composition of the photosensitive layer has infiltrated the adjacent layer.
Dependencies are inferred from the claim text.