Abstract: In one embodiment, a method of manufacturing a mold includes: forming a first layer having an affinity to a second polymer on a substrate having an affinity to a first polymer; forming first and second openings in the first layer; filling a resist in the second openings and hardening the resist to obtain a hardened resist; and forming a second layer containing a block copolymer and causing it to self-assemble.

Abstract: A hologram-recording medium containing: a recording layer containing a polymerizable monomer containing a structural framework represented by the following general formula (1). In general formula (1), X and Y are not the same, and X and Y are selected from hydrogen, iodine, bromine, and chlorine atoms and from methyl, ethyl, isopropyl, tert-butyl, phenyl, naphthyl, hydroxyl, methoxy, ethoxy, isopropoxy, tert-butoxy, phenoxy, naphthoxy, acetyl, carboxyl, acetoxy, thiophenyl, thionaphthyl, thiomethyl, thioethyl, thioisopropyl, thio-tert-butyl, and thiol groups; and W is selected from the group consisting of benzylvinyl, styryl, acryloyl, and methacryloyl groups.

Abstract: A holographic recording method includes the following steps: irradiating an optical recording medium with a coherent reference beam and a coherent information beam to produce a hologram in the optical recording medium while irradiating the optical recording medium with an incoherent pretreatment beam to consume a polymerization inhibitor; irradiating the hologram with the reference beam to extract a reproduction beam while stopping irradiating the optical recording medium with the reference beam; sensing the signal beam with an image pick-up unit to detect an intensity of the signal beam; and calculating a bit error rate with a control unit to irradiate the hologram with the information beam if the bit error rate is larger than a prescribed value, or to stop irradiating the optical recording medium with the reference beam, the information beam and the pretreatment beam if the bit error rate is smaller than the prescribed value.

Abstract: An optical recording medium includes a first substrate having a groove on the side of an outer peripheral portion thereof; a second substrate in contact with the first substrate in the outer peripheral portion; and a recording layer being disposed in a gap between the first substrate and the second substrate and forming a void in cooperation with the first substrate at the portion of the groove.

Abstract: According to a first aspect of the invention, an optical information recording apparatus includes a spatial beam modulator, an optical component, a drive unit, and a control unit. The apparatus performs angle-multiplex recording of the information so that an absolute value of a bisector angle ?x for n-th recording (1?n?rN) is smaller than an absolute value of a bisector angle ?x for m-th recording (m>n and rN<m?N). Here, N is the number of pages to be defined as the total number of recording times performed on a recording spot of an optical information recording medium. The n-th recording is performed on the recording spot with the reference beam and the information beam. r is a rate to be determined by a volumetric shrinkage of the optical information recording medium. The volumetric shrinkage increases with irradiating the optical information recording medium with the reference beam and the information beam.

Abstract: A holographic recording medium includes a recording layer. The recording layer includes a framework being expressed with the following general formula (1), In the above formula (1), Ar represents a substituted or unsubstituted group selected from benzothiophene group, naphthothiophene group, dibenzothiophene group, thienothiophene group, dithienobenzene group, benzothiazole group, naphthothiazole group, benzoisothiazole group, naphthoisothiazole group, phenothiazine group, phenoxathiin group, dithianaphthalene group, thianthrene group, thioxanthene group, and bithiophene group. In addition, n is an integer from 1 to 4.

Abstract: An optical information recording apparatus includes a first optical system that radiates an information beam that carries information onto a recording medium; a second optical system that radiates reference beams onto the recording medium; a radiation position specifying unit that specifies a plurality of recording spots positioned within a radiation range of the reference beams; and an incident angle obtaining unit that specifies an incident angle of the reference beams that is used for recording an i'th interference fringe into a second recording spot adjacent to a first recording spot, as a value obtained by adding a product of 1/(1+m) and an absolute value of a difference between an incident angle of a first reference beam used for recording an i'th interference fringe into the first recording spot and an incident angle of a second reference beam used for recording an (i+1)'th interference fringe into the first recording spot.

Abstract: A holographic recording medium is provided. The medium includes a recording layer. The recording layer includes a polymer matrix, a polymerizable monomer and a photopolymerization initiator. The polymerizable monomer includes a monomer being expressed in the following general formula (M1), (M2), or (M3). In the above general formulas, “A” and “B” denote a polymerizable substituent group and a nonpolymerizable substituent group, respectively.

Abstract: A holographic recording medium has a recording layer including a radical-polymerizable compound, a first photo-radical polymerization initiator (A) containing a titanocene compound, and a second photo-radical polymerization initiator (B) containing at least one compound selected from the group consisting of an amino acetophenone derivative, an acylphosphine oxide derivative, a benzyl derivative, and a thioxanthone derivative.

Abstract: An optical recording medium is provided, which includes a recording layer includes a polymer matrix, a polymerizable compound, a photopolymerization initiator, and a polymerization inhibitor. The polymerization inhibitor is formed of a compound which exhibits a molar absorption coefficient of zero to a light having a first wavelength and generates an acid or a base when exposed to an external stimulus other than the light having the first wavelength, thereby inhibiting the polymerization of the polymerizable compound.

Abstract: A holographic recording medium is provided, which includes a recording layer including a radically polymerizable monomer having an ethylenically unsaturated bond, a photo-acid generator, a photo-radical polymerization initiator, and a polymeric matrix. The polymeric matrix includes a repeating unit expressed by any one of the following chemical formulae.

Abstract: A holographic recording medium is provided, which includes a recording layer containing a three-dimensional crosslinked polymer matrix, a photo-radical generating agent, and a ring-opening polymerizable compound having a radically ring-opening polymerizable alicyclic structure.

Abstract: An optical recording/reproducing apparatus includes an optical recording medium in which a holograms are recorded depending on an incident angle of a reference beam. The reference beam is irradiated to holograms while changing the incident angle to generate a reproduction light beam, and an image patterns are detected by an image pattern detector. The continuously output reproduction image patterns are temporarily stored in an image recorder, and the maximum value of reproduction light intensity is detected to generate a trigger signal. Depending on the trigger signal, an optimal image pattern is extracted from continuous reproduction image patterns, and thus, two-dimensional data is decoded.

Abstract: A holographic recording medium is provided, which includes a recording layer. The recording layer comprises a radical polymeric monomer having an aromatic ring-containing group and a polymeric group, a polymer matrix having the aromatic ring-containing group, and a photo-radical polymerization initiator.

Abstract: An optical recording medium includes a first substrate having a groove on the side of an outer peripheral portion thereof; a second substrate in contact with the first substrate in the outer peripheral portion; and a recording layer being disposed in a gap between the first substrate and the second substrate and forming a void in cooperation with the first substrate at the portion of the groove.

Abstract: A holographic recording medium is provided, which includes a recording layer comprising a three-dimensional cross-linking polymer matrix, a radical polymeric compound, and a photo-radical polymerization initiator. The three-dimensional cross-linking polymer matrix is represented by the following general formula (1): where m is an integer ranging from 3 to 16.

Abstract: The present invention relates to a powdery photosensitive material comprising evenly dispersed components and free from a variation in quality, and an optical recording medium produced from the photosensitive material. The photosensitive material is produced by a process including freezing a solution of components that constitutes the photosensitive material dissolved in a first solvent and then drying the resultant solid under reduced-pressure.

Abstract: An optical recording medium has a transparent substrate having a first surface and a second surface, a recording layer provided on the first surface of the substrate and on which a light beam is incident to record information as a hologram, and a servo layer provided on the second surface of the substrate and including a phase change layer in which servo information is recorded as a phase change. The servo information is recorded as changes in the phase of the phase change layer.

Abstract: An optical recording medium includes: a recording layer containing a photopolymerization initiator and a photopolymerization compound; and a pigment that generates light through a multiphoton absorption process.

Abstract: A holographic recording medium includes a recording layer containing a matrix material, a photoactive monomer having an ethylenic unsaturated bond dispersed in the matrix material and a photoinitiator, and a polymerization-terminating layer formed on at least one surface of the recording layer.