Embodiments related near-eye display devices having angularly multiplexed holograms are disclosed. One disclosed embodiment provides a near-eye display device including an image source, a waveguide, and a controller. The waveguide is configured to propagate light received the image source to a user of the near-eye display device, and includes a holographic grating comprising a plurality of angularly multiplexed holograms. The controller is configured to control display of an image via the image source.

Multiplexed hologram tiling in a waveguide display

The object of the present invention is to provide an optical recording medium which includes a substrate, a first information layer and a second information layer, the first information layer and the second information layer are disposed on the substrate through an intermediate layer in a laminar structure; recording and reproducing is performed on each of the two information layers by laser beam irradiation from the first information layer side; the second information layer is provided with at least a reflective layer, a dielectric layer, and a second dye recording layer formed in this order; and the dielectric layer is formed from any one of materials selected from the group consisting of oxides, nitrides, sulfides, carbides or mixtures thereof from any one of elements which are not same as metal elements and semi-metal elements used for forming the reflective layer.

Optical Recording Medium

A laser machining device is provided with a laser light source, a spatial light modulator, a driving unit, a control unit, and a condensing optical system. The control unit selects a basic hologram corresponding to each basic machining pattern included in a whole machining pattern in a workpiece from a plurality of basic holograms stored by the storage unit, and determines a display region of the basic hologram in the spatial light modulator so that the deviation of the value of “Iη/n” becomes small for the selected respective basic hologram when the intensity of a laser beam input to a display region of the basic hologram in the spatial light modulator is defined as I, the diffraction efficiency of the laser beam in the basic hologram is defined as η, and the number of condensing points in a basic machining pattern corresponding to the basic hologram is defined as n.

Laser machining device and laser machining method

A holographic recording medium wherein a holographic recording layer is interposed between a first base and a second base is characterized in that the holographic recording layer contains at least a binder-forming compound, a compound having an ethylenically unsaturated bond, and a photopolymerization initiator which is capable of initiating polymerization reaction of the compound having an ethylenically unsaturated bond, in that the content of the compound having an ethylenically unsaturated bond is within 1-50 mass% relative to the total amount of the composition, and in that the photopolymerization initiator contains a compound represented by the following general formula (1). [A-Fe-B]+·X- (1) By having such a structure, the holographic recording medium can be highly sensitive and excellent in storage stability. Also disclosed are a holographic recording method and a holographically recorded holographic information media.

Holographic recording medium, holographic recording method and holographic information medium

A hologram recording film manufacturing method includes the steps of obtaining a laminated structure by alternately laminating M (where M≧2) photosensitive material precursor layers including a photosensitive material and at least one (M−1) resin layer on one another, obtaining M photosensitive material layers, where at least two interference fringes with a desired pitch and a desired slant angle are formed on each of the M photosensitive material layers, from the M photosensitive material precursor layers by irradiating the laminated structure with a reference laser light beam and an object laser light beam, and making the slant angles of the M photosensitive material layers different from each other while retaining the pitch value, which is defined on a face of the photosensitive material layer, by irradiating the laminated structure with an energy ray from the laminated structure's one face side, and heating the laminated structure.

Hologram recording film and method of manufacturing same, and image display apparatus

A method for recording information on a rewritable optical recording medium having information recording layers by making a recording mark having a favorable shape. In the method, a laser beam is applied to the light incidence surface (13a) of an optical recording medium (10) having at least an LO layer (20) and an L1 layer (30) formed thereon in a multilayer structure so as to make recording marks selected from a group consisting of recording marks of types having different lengths corresponding to the respective integral multiples of the clock period. For at least one type of the recording marks, the number of pulses of the laser beam applied to form the recording mark in the L0 layer (20) is set to a value smaller than that of the laser beam applied to form the recording mark in the L1 layer (30).

Method for recording information on optical recording medium, information recorder, and optical recording medium

An information recording method for recording information in an optical recording medium having at least stacked first and second information recording layers by projecting a laser beam whose power is modulated thereonto via a light incidence plane, and setting a pulse width of a multi-pulse of the laser beam when information is to be recorded in the first information recording layer to be shorter than that when information is to be recorded in the second information recording layer, thereby recording information in the optical recording medium.

Method of recording information in optical recording medium, information recording apparatus and optical recording medium

Provided is a hologram retrieval method and a holographic recording and reproducing apparatus for preventing an increase in SNR, a decrease in retrieval accuracy, or the retrieval itself from being made impossible, which would otherwise occur because of a small size of data used for retrieval. Digital information is recorded on a holographic recording medium as data pages DP formed of a two-dimensional bit map image with each page being multiplexed. The data page DP is divided into a plurality of equal data blocks DB 11 to 13 , DB 21 to DB 23 , and DB 31 to DB 33 , and each data block DB is provided with a data image that is encoded by an encoding method for providing a certain number of ON pixels within each data block DB. A spatial light modulator allows the to-be-retrieved data image to be encoded by the encoding method and displayed as block information on a retrieval data block associated with the data block, and a signal beam to be thereby modulated. Of resulting diffracted beams, the diffracted beam of the maximum intensity is used to detect the target data image and the address of the reference beam.

Hologram retrieval method and holographic recording and reproducing apparatus

A holographic recording medium in which the recording area is not sacrificed and no noise is produced in the recording layer by the servo light. The holographic recording medium (12) comprises a substrate (13), a recording layer (14) on the substrate (13), a spacer layer (15) on the recording layer (14), and a servo layer (16) on the spacer layer (15). The servo layer (16) reflects a servo light and has either wavelength selectivity or incidence angle selectivity to transmit the object light and the reference light.

Holographic recording medium, its manufacturing method, and holographic recording/reproducing system

A holographic recording medium (10) comprises a recording layer (12), two substrates (14, 16) sandwiching the recording layer (12), and a photosensitive protective layer (18) wholly covering the recording layer (12) and the substrates (14, 16). The photosensitivity of the recording layer (12) to the recording wavelength decreases near the recording wavelength from the short wavelength side to the long wavelength side. The light transmittance of the photosensitive protective layer (18) to the recording wavelength decreases near the recording wavelength from the long wavelength side to the short wavelength side. Thus, without lowering the recording sensitivity, the damage to the recording layer from the environment light exposure is lessened.

Hideaki Miura

Papers

Method for recording information on optical recording medium, information recorder, and optical recording medium

Method of recording information in optical recording medium, information recording apparatus and optical recording medium

Hologram retrieval method and holographic recording and reproducing apparatus

Holographic recording medium, its manufacturing method, and holographic recording/reproducing system

Holographic recording medium