Abstract: An exposing device includes: a first light-emitting element that emits first light; a second light-emitting element that emits second light; and a liquid crystal panel that is disposed between the first and second light-emitting elements and a photoreceptor body to be exposed to the second light, and focuses the second light on the photoreceptor body by a convex refractive index distribution that is formed in the liquid crystal panel by an orientation variation that is caused by illumination with the first light.

Abstract: There is provided an exposure device including: a light-emitting element array in which plural light-emitting elements are arrayed in a predetermined direction; and a hologram element array in which plural hologram elements are multiplex-recorded, in correspondence with the plural light-emitting elements, at a recording layer that is disposed above the light-emitting element array such that collected-light points, that are formed on a surface to be exposed by converging of diffracted lights that exit due to illumination of lights from the plural light-emitting elements, are aligned in the predetermined direction, and such that intersection points between optical axes of reference lights and optical axes of signal lights that record the plural hologram elements respectively are not aligned in the predetermined direction.

Abstract: There is provided an exposure device including: a light-emitting element array at which a plurality of light-emitting elements, that emit light that passes through an optical path of diffused light, are arrayed one-dimensionally or two-dimensionally on a substrate; and a hologram element array at which a plurality of hologram elements are formed at positions, that respectively correspond to the plurality of light-emitting elements, of a hologram recording layer disposed on the substrate, so as to diffract and collect, at an outer side of illumination regions of all of the plurality of light-emitting elements, respective lights that are emitted from the plurality of light-emitting elements respectively.

Abstract: A lens manufacturing apparatus includes a conveying unit that conveys a workpiece having a sheet member and a resin base on the sheet member, an unevenness forming unit that moves a cutting blade in a direction different from the conveying direction of the workpiece and that makes a cut in the surface of the resin base to form concave and convex portions, a resin supply unit that includes nozzles supplying a lens resin to areas, in which the concave portions are not formed, between the convex portions formed on the surface of the resin base, and a resin curing unit that cures the supplied lens resin.

Abstract: There is provided an exposure device including: a light-emitting element array having an elongated support and plural light-emitting elements, the light-emitting elements being arranged in at least one row along a length direction of the support such that a spacing between two adjacent light-emitting elements is a pre-specified first spacing; and a hologram element array having a hologram recording layer disposed on the support and plural hologram elements formed, the plural hologram elements corresponding with each of the light-emitting elements and being formed such that a spacing along the support length direction between two adjacent hologram elements is the first spacing, and a diameter in the support length direction of each of the plural hologram elements being larger than the first spacing, such that a respective light emitted from each of the light-emitting elements is diffracted and focused toward a pre-specified image-forming plane by the corresponding hologram element.

Abstract: A lens manufacturing apparatus includes a concave-convex shape forming unit that makes a notch in the surface of a workpiece to form a concave-convex shape portion, a resin supply unit that supplies resin for a lens onto the surface of the workpiece, a resin curing unit that cures the supplied resin for a lens, a moving unit that moves the concave-convex shape forming unit, the resin supply unit, and the resin curing unit relative to the workpiece, and a control unit that controls driving of the concave-convex shape forming unit, the resin supply unit, the resin curing unit, and the moving unit so as to form the concave-convex shape portion extending in a predetermined direction, supply the resin for a lens between adjacent concave-convex shape portions and cure the supplied resin for a lens.

Abstract: An image-reading apparatus includes a light dividing unit that divides irradiated light so that a part of the light having a first wavelength is diffracted, and a part of the light having a second wavelength is transmitted; a first light measuring unit that measures an intensity of light entering into a first measuring area, and outputs first measurement information indicating the measured intensity; a second light measuring unit that measures an intensity of light entering into a second measuring area, and outputs second measurement information indicating the measured intensity; an image-forming unit that forms an image of a subject for reading in the first measurement area, and that forms a virtual image in the second measurement area using light diffracted by the light dividing unit; and a generation unit that corrects the first measurement information on the basis of the second measurement information.

Abstract: An image reading device comprises: a light source; a first optical element that focuses light emitted from the light source, the emitted light being reflected by a medium in a first detection area; a first detector that outputs first detection information in response to arrival of light in the first detection area; a second optical element that guides to a second detection area a portion of the light emitted from the light source, which portion does not arrive at the reflective medium in the first detection area; a second detector that outputs second detection information responsive to detection of light at the second detection area; and a generator that generates image data of the medium by revising the first detection information on the basis of the second detection information.

Abstract: An exposure device includes at least one light emitting element that emits light in a normal direction of the substrate; at least one hologram element that is recorded on a recording layer arranged on the substrate to diffract light emitted from the light emitting element and condense the diffracted light on a condensing point on a normal line of the light emitting element; and at least one light inhibiting part that is arranged on a straight line that connects the light emitting element and the condensing point such that the light diffracted by the hologram element passes through the outside of the light inhibiting part and condenses at the condensing point, to inhibit transmission of zeroth-order light that goes straight toward the condensing point from the light emitting element without being diffracted by the hologram element.

Abstract: An optical recording apparatus comprises: a focusing section that focuses to a transmission type recording medium a recording light beam including a signal light beam and a reference light beam which are radiated from a same direction with a common optical axis; and a focused-position moving section that moves with respect to a direction of the optical axis a focused position where the recording light beam is focused to the transmission type recording medium by the focusing section, wherein an interference fringe formed by the recording light beam is recorded in the transmission type recording medium at each position which is moved by the focused-position moving section.

Abstract: A hologram recording apparatus includes a reference light applying unit that includes an incidence plane, that converts reference light to be incident on the incidence plane into reference beams incident on a recording medium from plural directions, and that simultaneously applies the reference beams to the recording medium, and an object light applying unit that applies object light, in which plural identical parallax images are arranged to correspond to the neighboring reference beams having different incidence angles, to the recording medium.

Abstract: An optical reproducing method. A diffracted light is generated by irradiating a reference light onto a hologram. A combined light is generated by applying a direct-current component formed by a polarized light having a third polarization component with a first polarization plane having a polarization direction orthogonal to the diffracted light and having the same phase as the diffracted light, and a fourth polarization component with a second polarization plane having an opposite phase to the diffracted light, onto the diffracted light. The combined light is separated into a fifth polarization component including a first polarization component and the third polarization component, and a sixth polarization component including a second polarization component and the fourth polarization component. A first reproduced image is reproduced from the separated fifth polarization component, and a second reproduced image is reproduced from the separated sixth polarization component.

Abstract: An optical apparatus includes: a focusing lens that focuses light which is one of recording light being irradiated to an optical recording medium with reference light for recording a hologram and reference light being irradiated to an optical recording medium for reading out a hologram; and a focal position-shifting unit that refracts the light while moving in accordance with a moving speed of the optical recording medium, so as to shift a focal position of the light in the optical recording medium a distance in a thickness direction of the optical recording medium.

Abstract: A light-collecting device is provided, a light-collecting device, including: a first volume hologram recorded in a hologram recording layer by interference of a first spherical wave and a planar wave, the first spherical wave passing through a light path of diffused light which radiates from a light incident point, passes through the hologram recording layer and spreads to a predetermined diameter; and a second volume hologram recorded in the hologram recording layer by interference of a second spherical wave and the planar wave, the second spherical wave passing through a light path of converging light which radiates from the same side as the first spherical wave, passes through the hologram recording layer and converges at an image-forming point distanced from the hologram recording layer by a predetermined distance, the planar wave intersecting with the first spherical wave and the second spherical wave.

Abstract: A hologram recording method includes generating light of a pattern in which a plurality of unit blocks, which include at least one pixel and express luminance, are arrayed, the pattern being sectioned into a region of a signal beam and a region of a reference beam, and being generated such that the region of the reference beam includes a plurality of unit blocks whose numbers of pixels are different; collecting the generated light at a common optical system, and illuminating it onto an optical recording medium; and recording, as a hologram, data which the signal beam expresses.

Abstract: There is provided an exposure device including: a light-emitting element array in which plural light-emitting elements are arrayed in a predetermined direction; and a hologram element array in which plural hologram elements are multiplex-recorded, in correspondence with the plural light-emitting elements, at a recording layer that is disposed above the light-emitting element array such that collected-light points, that are formed on a surface to be exposed by converging of diffracted lights that exit due to illumination of lights from the plural light-emitting elements, are aligned in the predetermined direction, and such that intersection points between optical axes of reference lights and optical axes of signal lights that record the plural hologram elements respectively are not aligned in the predetermined direction.

Abstract: There is provided a focusing element including: a light-generating element that generates light in a pre-specified wavelength range and emits diffuse light; and a hologram element in a recording layer disposed at a light emission side of the light-generating element, the hologram element being recorded by wavelength multiplexing with light of plural wavelengths selected from the wavelength range of the light-generating element, and the hologram element being illuminated with the diffuse light from the light-generating element and emitting diffracted light that converses at a pre-specified focusing point.

Abstract: An exposing device includes: a first light-emitting element that emits first light; a second light-emitting element that emits second light; and a liquid crystal panel that is disposed between the first and second light-emitting elements and a photoreceptor body to be exposed to the second light, and focuses the second light on the photoreceptor body by a convex refractive index distribution that is formed in the liquid crystal panel by an orientation variation that is caused by illumination with the first light.

Abstract: An optical device for holographic recording or reading is provided and includes: a light emission unit that emits light to be irradiated on an optical recording medium, the light being recording or reading light; a first prism unit that moves in accordance with a moving speed of the optical recording medium and refracts the light to move the light irradiated on the optical recording medium over a distance in a moving direction of the optical recording medium so that the light is irradiated on substantially the same position on the optical recording medium for a period of time; and a second prism unit that moves in accordance with the moving speed of the first prism unit to compensate for an optical path length of the light.

Abstract: There is provided an optical reproducing device including: a reproducing component that includes a light source, a spatial light modulator, and a light guiding component, with the reproducing component irradiating, with reference light that has been generated by the spatial light modulator as reading light, a Fourier transform hologram; a splitting component disposed on a signal light exiting side of the reproducing component and that splits, into two light waves, the signal light; a first image acquiring component that detects the one split light wave to acquire a first reproduced image; a second image acquiring component that detects light where a direct current component has been removed from the other split light wave to acquire a second reproduced image; and a decoding component that uses the first reproduced image and the second reproduced image to decode data that the signal light has.