The present disclosure relates in one aspect to methods of preparing non-homogeneous polymer materials wherein light is used to control structure and/or composition. In certain embodiments, the present disclosure provides methods for creating gradient index optical elements including holographic elements.

Provided is a photopolymer composition for hologram recording comprising: a polymer matrix or a precursor thereof; a dye including a compound of the following Chemical Formula 1; a photoreactive monomer; and a photoinitiator, ##STR00001##

Provided is a photopolymer composition for hologram recording comprising: a polymer matrix or a precursor thereof; a dye including a compound of the following Chemical Formula 1; a photoreactive monomer; and a photoinitiator, ##STR00001##

A holographic recording medium composition contains an isocyanate group-containing compound (component (a-1)), an isocyanate-reactive functional group-containing compound (component (b-1)), a polymerizable monomer (component (c-1)), a photopolymerization initiator (component (d-1)), and a stable nitroxyl radical group-containing compound (component (e-1)). A ratio of the total weight of a propylene glycol unit and a tetramethylene glycol unit that are contained in the component (b-1) to the total weight of the component (a-1) and the component (b-1) is 30% or less.

A photosensitive resin composition for imprinting, a cured article and an optical element are provided. The photosensitive resin composition for imprinting includes a resin (A), an ethylenically unsaturated monomer (B), a photoinitiator (C), a solvent (D), and a hydrophobic oligomer (E). The resin (A) has a weight average molecular weight of 1,000 to 50,000 and has two or more ethylenic polymerizable groups.

A photosensitive resin composition for imprinting, a cured article and an optical element are provided. The photosensitive resin composition for imprinting includes a resin (A), an ethylenically unsaturated monomer (B), a photoinitiator (C), a solvent (D), and a hydrophobic oligomer (E). The resin (A) has a weight average molecular weight of 1,000 to 50,000 and has two or more ethylenic polymerizable groups.

A photopolymerizable composition including: a polymer matrix or a precursor thereof containing a reaction product of an acrylate-based polyol and a compound containing at least one isocyanate group; a photoreactive monomer; and a non-reactive fluoro compound and a photoinitiator; a hologram recording medium produced from the composition; an optical element including the hologram recording medium; and a method of recording a hologram using the photopolymerizable composition.

The present disclosure relates to a photopolymer composition including: a polymer matrix or a precursor thereof; a photoreactive monomer including a polyfunctional (meth)acrylate monomer having a refractive index of 1.5 or less and a viscosity at 25° C. of 100 cps or less, and a monofunctional (meth)acrylate monomer having a refractive index of 1.5 or more; and a photoinitiator, wherein a content of the monofunctional (meth)acrylate monomer having a refractive index of 1.5 or more in the photoreactive monomer is 60 wt % or more. The present disclosure also relates to a hologram recording medium produced from the photopolymer composition, an optical element including the hologram recording medium, and a holographic recording method using the photopolymer composition.

The present invention relates to a compound having a novel structure, a photopolymer composition including the compound as a dye, a hologram recording medium produced from the photopolymer composition, an optical element including the hologram recording medium, and a holographic recording method using the hologram recording medium.

The present invention relates to a compound having a novel structure, a photopolymer composition including the compound as a dye, a hologram recording medium produced from the photopolymer composition, an optical element including the hologram recording medium, and a holographic recording method using the hologram recording medium.