Abstract: To provide a hologram recording composition that can further improve diffraction characteristics and transparency of a hologram. The present technology provides a hologram recording composition containing a heteropoly acid, a photopolymerizable monomer, a photopolymerization initiator, and a sensitizing dye having absorption in a visible light region in the presence of an acid. The present technology also provides a hologram recording medium including at least a photocurable resin layer containing a heteropoly acid, a photopolymerizable monomer, a photopolymerization initiator, and a sensitizing dye having absorption in a visible light region in the presence of an acid. Furthermore, the present technology also provides a diffraction optical element using the hologram recording medium. Moreover, the present technology also provides an optical device, an optical component, and an image display device using the diffraction optical element.

Abstract: Provided is a hologram recording medium that has high in-plane uniformity of a diffraction peak wavelength and can be peeled off from a release layer after exposure. The hologram recording medium includes a protective layer and a photosensitive layer. The initial maximum load on the protective layer measured in a tensile test is 3 N or more and 1000 N or less. The photosensitive layer contains a polymerizable compound and a polymerization initiator, and the polymerization initiator contains an electron-donating initiator and an electron-accepting initiator.

Abstract: Provided is a hologram recording medium that can achieve suppression of deterioration of the storage stability in an unexposed state. The hologram recording medium includes a base material and a photosensitive layer. The oxygen permeability of the base material measured in an environment at 23° C. and 0% RH is more than 0.1 cm3·(m2·day·atm)?1 and 10000 cm3·(m2·day·atm)?1 or less. The photosensitive layer contains a polymerizable compound, and the polymerizable compound contains a compound represented by a specific general formula.

Abstract: The present invention provides a composition for hologram recording, a hologram recording medium and a hologram that are capable of realizing excellent diffraction characteristics and an optical device and an optical member using same. The present invention is capable of providing a composition for hologram recording containing at least a radical polymerizable monomer and a matrix resin, in which a cross-sectional observation image at the time of observing a hologram recording film by atomic force microscopy (AFM) has a diffraction grating structure indicating that there is a material density difference that can be observed by the AFM.

Abstract: To provide a compound that is capable of improving the function of an organic material. The present technology provides a compound represented by the following general formula (1). In the general formula (1), X1 represents an oxygen atom, a nitrogen atom, a phosphorus atom, a carbon atom, or a silicon atom. Y1 and Y2 each represent a benzene ring or a naphthalene ring, and both Y1 and Y2 do not represent benzene rings. R1 to R3 each represent a hydrogen or a substituent group represented by *—Z1(R4)d (* represents a bonding site). Z1 represents a single bond, a saturated hydrocarbon group having a valence of 2 or higher, or an unsaturated hydrocarbon group having a valence of 2 or higher, the saturated hydrocarbon group or the unsaturated hydrocarbon group optionally having an ether bond and/or a thioether bond. R4 represents a hydrogen or a polymerizable substituent group.

Abstract: To provide a photosensitive composition for hologram recording that enables further improvement in diffraction characteristic. A photosensitive composition for hologram recording that includes at least two kinds of photopolymerizable monomers, a photopolymerization initiator, a binder resin, and a polymerization inhibitor. The at least two kinds of photopolymerizable monomers are a monofunctional monomer and a polyfunctional monomer.

Abstract: To provide a photosensitive composition capable of further improving diffraction characteristics. The present technology provides a photosensitive composition including: at least a compound represented by the following general formula (1); a binder resin; and a photoinitiator. In the general formula (1), X1 represents an oxygen atom, a nitrogen atom, a phosphorus atom, a caron atom, or a silicon atom. Y1 and Y2 each represent a benzene ring or a naphthalene ring, and both Y1 and Y2 do not represent benzene rings. R1 to R3 each represent a hydrogen or a substituent group represented by *—Z1(R4)d (* represents a bonding site). Z1 represents a single bond, a saturated hydrocarbon group having a valence of 2 or higher, or an unsaturated hydrocarbon group having a valence of 2 or higher, and the saturated hydrocarbon group or the unsaturated hydrocarbon group may have an ether bond and/or a thioether bond. R4 represents a hydrogen or a polymerizable substituent group.

Abstract: To provide a hologram recording composition capable of further improving diffraction characteristics. The present technology provides a hologram recording composition containing at least a radically polymerizable monomer, a matrix resin, a photopolymerization initiator, and an anthracene-based compound. The present technology also provides a hologram recording medium including a photocurable resin layer containing at least a radically polymerizable monomer, a matrix resin, a photopolymerization initiator, and an anthracene-based compound. Furthermore, the present technology also provides a hologram using the hologram recording medium. Moreover, the present technology also provides an optical device and an optical component using the hologram.

Abstract: To provide a hologram recording composition capable of further improving diffraction characteristics and the transparency of a hologram. The present technology provides a hologram recording composition containing at least a chromic dye whose decolorized body has a structure containing a primary and/or secondary amino group, an epoxy monomer, and a polymerization initiator. The present technology also provides a hologram recording medium including a photosensitive layer containing at least a chromic dye whose decolorized body has a structure containing a primary and/or secondary amino group, an epoxy monomer, and a polymerization initiator. Furthermore, the present technology also provides a hologram optical element using the hologram recording medium. Moreover, the present technology also provides an optical device and an optical component using the hologram optical element.

Abstract: To provide a hologram recording composition that can further improve diffraction characteristics and transparency of a hologram. The present technology provides a hologram recording composition containing a heteropoly acid, a photopolymerizable monomer, a photopolymerization initiator, and a sensitizing dye having absorption in a visible light region in the presence of an acid. The present technology also provides a hologram recording medium including at least a photocurable resin layer containing a heteropoly acid, a photopolymerizable monomer, a photopolymerization initiator, and a sensitizing dye having absorption in a visible light region in the presence of an acid. Furthermore, the present technology also provides a diffraction optical element using the hologram recording medium. Moreover, the present technology also provides an optical device, an optical component, and an image display device using the diffraction optical element.

Abstract: Providing a compound that can realize an organic material with an enhanced function. Provided is a compound represented by the following general formula (1). (In the general formula (1), R101 to R104 are each independently a univalent substituent group represented by the following general formula (2-1), i to 1 are each independently an integer of 0 or 1, provided that i to 1 are not simultaneously 0.) (In the general formula (2-1), R203 and R204 are each independently a single bond or a straight chain or branched substituted or unsubstituted alkylene group represented by CnH2n (n is an integer of equal to or greater than 1), R205 is hydrogen or a straight chain or branched substituted or unsubstituted alkyl group represented by CnH2n+1 (n is an integer of equal to or greater than 1). Represented by k is an integer of equal to or greater than 1, and X is a bivalent or more-valent aromatic group.

Abstract: To provide a photosensitive composition for hologram recording that enables further improvement in diffraction characteristic.—A photosensitive composition for hologram recording that includes at least two kinds of photopolymerizable monomers, a photopolymerization initiator, a binder resin, and a polymerization inhibitor. The at least two kinds of photopolymerizable monomers are a monofunctional monomer and a polyfunctional monomer.