Abstract: There is provided an optical modeling apparatus that forms a model of a desired shape by sequentially forming hardened layers by irradiating a light curable resin with light. The apparatus includes a first light source that emits a light beam for plotting on the resin, a scanning device that scans the light beam from the first light source over the resin, a second light source that emits light that irradiates one fixed region of the resin at a time, a spatial light modulator that spatially modulates the light from the second light source and blanket-exposes a specified region of the resin, and an exposure position adjuster that moves, in at least one direction, the light from the spatial light modulator. The light beam from the scanning device and the light from the spatial light modulator form each hardened layer.

Abstract: An inline type speckle multiplexed hologram recording apparatus and method is disclosed which can condense signal light and reference light in a sufficiently overlapping relationship with each other on a hologram recording medium without using a lens having a large aperture and a wide angle of view. A signal light region and a reference light region are displayed on a spatial light modulator, and laser light is intensity modulated with recording data displayed in the signal light region to produce signal light while the laser light having passed through the reference light region is used as reference light. The signal light and the reference light are diffused by a diffuser and then condensed in an overlapping relationship with each other on a hologram recording medium by a lens such that interference fringes produced thereby are recorded in the hologram recording medium.

Abstract: A hologram reconstructing apparatus is disclosed. The apparatus includes: unnecessary light removing means for causing the imaging means to receive necessary light only included in the reconstruction light; driving means for operating the hologram recording medium or a reconstruction light optical system; light detecting means for detecting the state that reconstruction light is projected to the unnecessary light removing means of the light cut by the unnecessary light removing means; and control means for obtaining the displacement of the hologram recording medium based on the information on a specific part of the projection state information detected by the light detecting means and controlling the driving means to cancel the displacement and move the hologram recording medium or the optical system.

Abstract: A magneto generator can reduce the man-hours of processing and an amount of use (i.e., an amount of material) of permanent magnets used per generator. The magneto generator includes a bowl-shaped flywheel that rotates about an axis of rotation, a plurality of permanent magnets that are fixedly secured to an inner peripheral wall surface of the flywheel, a stator core that is arranged at an inner side of the permanent magnets and has a plurality of teeth protruding to a radially outer side, and magneto coils that are formed of conductors wound around the teeth, respectively. Each of the permanent magnets is composed of a plurality of magnet pieces that are formed by dividing a hexahedral magnet main body with a division surface extending in a radial direction.

Abstract: The present invention provides a hologram apparatus for recording interference fringes formed from reference light and signal light optically spatially modulated by a spatial light modulator on a hologram recording material or picking up an image of reproduction signal light produced by irradiating illumination reproduction light on the hologram recording material by means of an image pickup device to obtain a reproduction image signal. The hologram apparatus includes a matching data acquisition section, an arithmetic operation section, and a positioning control section. The matching data acquisition section directly picks up an image of the signal light optically spatially modulated with a pixel matching pattern displayed on the spatial light modulator by means of the image pickup device to obtain a reproduction image signal. The arithmetic operation section performs predetermined arithmetic operation using a luminance value of the reproduction image signal.

Abstract: A magnetoelectric generator according to the present invention includes: a bowl-shaped flywheel that rotates around an axis of rotation; a permanent magnet unit that is fixed to an inner circumferential wall surface of the flywheel and in which adjacent permanent magnets are linked by means of a linking member; a stator core that is disposed inside the permanent magnet unit and that has a plurality of teeth that project radially outward; and a generating coil that is configured by winding conducting wire onto each of the teeth.

Abstract: A hologram recording medium is provided which can prevent sensitization of a region thereof other than a data recording region thereby to prevent deterioration of a characteristic of the hologram recording medium. The hologram recording medium includes partition members for partitioning a recording material. Upon recording, unnecessary light generated when signal light and reference light enter the recording material is blocked from propagating in the recording material by the partition members and cannot advance into adjacent partitions. Therefore, unnecessary sensitization of the recording material by the unnecessary light can be prevented, and particularly, decrease of the recording capacity can be prevented. Consequently, the performance of a hologram recording and reproduction apparatus which adopts, for example, a multiplex recording system can be exhibited fully.

Abstract: An apparatus and method is disclosed wherein, even if the multiplicity in multiplexing of recording data is increased, positioning of data upon reproduction can be performed with a high degree of accuracy without decreasing the recording capacity. Interference fringes generated by interference of a light beam spatially optically modulated by a spatial light modulator on which a marker data page is displayed with reference light are recorded at a recording spot on a hologram recording medium. Similarly, interference fringes corresponding to recording data page are recorded at another recording spot on the hologram recording medium. The multiplicity of such marker data pages upon recording is set to a value with which recognition of markers upon reproduction can be performed with a high degree of accuracy so that, even if the multiplicity of the data pages is raised, positioning information of high accuracy can be obtained.

Abstract: Two end plates of a stator core are made of a metal material to increase their rigidity and thereby hold, in a prescribed shape, generation coils that are wound on teeth of the stator core. To increase the insulation between the generation coils and the teeth, the circumferential width of a first portion, extending in the radial direction, of each of the end plates is made smaller than that of a corresponding first portion of a laminated core. At least a second portion of at least one of the two end plates is made of a non-magnetic metal material, whereby the magnetic loss is reduced and the temperature characteristic and the power generation characteristic are improved.

Abstract: A hologram reconstructing apparatus configured to irradiate a hologram recording medium that stores an interference pattern of a signal beam spatially modulated by data displayed on a spatial modulator and a reference beam emitted simultaneously with the signal beam with a reconstructing reference beam and to reconstruct data by capturing a reconstruction signal beam generated at the hologram recording medium being irradiated includes an image pickup unit that receives a partial reconstruction signal beam that constitutes part of the reconstruction signal beam by a full light-receiving plane; and a moving unit that relatively move the light-receiving surface of the image pickup means within an irradiation range of the reconstruction signal beam.

Abstract: A permanent-magnet generator is provided that has a bowl-shaped fly wheel integrally formed with a boss part by casting or hot forging, and that enables improvement in the quantity of rotation imbalance and significant reduction in the quantity of balance correction processing (drilling), which is necessary in a later process. The permanent-magnet generator has a bowl-shaped fly wheel produced by casting or hot forging, having a circumferential wall part and a bottom wall part, and having a boss part for supporting a rotating shaft, the boss part being integrally formed at the center of the bottom wall part. The plural vents are arranged substantially circularly with spacing from each other in the bottom wall part of the fly wheel, and a key groove for coupling with the rotating shaft is provided at a part of the boss part. The arrangement of at least one of the plural vents is made unequal in order to reduce the quantity of rotation imbalance including that of the key groove.

Abstract: A permanent-magnet generator includes a flywheel having a ringlike portion and a bottom portion which closes off one end of the ringlike portion and a plurality of protrusions bulging inward from the bottom portion of the flywheel. An irregular surface portion is formed in each of the protrusions for producing turbulence when the flywheel rotates, the irregular surface portion being irregularly shaped in section along a circumferential direction of the flywheel.

Abstract: In a holographic stereogram creating device for creating a holographic stereogram by sequentially recording interference fringes between reference light and object light, which is obtained by sequentially spatial-modulating a plurality of images picked up from different observing points, as strip or dot elemental holograms, on one hologram recording material of an object light projection optical system for irradiating the hologram recording material with the spatially modulated object light, the object light projection optical system includes a slit arranged at a conjugate position of the hologram recording material for eliminating unnecessary light and a lens attached to the slit.

Abstract: A holographic recording device for multiple recording a plurality of interference fringes of a reference light and intensity-modulated signal lights in a same area or in areas slightly shifted each other of a holographic recording medium is disclosed which includes: phase modulation means for modulating phase of the signal light before or after the intensity modulation; and control means for modulating phases of the signal lights used in performing the multiple recording such that the phases of the signal lights are different each other by changing a phase distribution of said phase modulation means every time when the multiple recording is performed.

Abstract: A hologram device records information of an interference fringe of signal light and reference light onto a hologram recording medium and reproduces the recorded information by emitting the reference light onto a recording area of the hologram recording medium. The hologram device includes a recording/reproducing controller performing a recording operation of the information concurrently with a reproducing operation of previously-recorded information, and an error detector detecting an error in the previously-recorded information reproduced concurrently with the recording operation.

Abstract: A rise in temperature of magneto coils can be suppressed, thereby improving the electrical efficiency, service life and reliability thereof. A flywheel (3) has a cylindrical portion (4), and is rotatable about an axis of rotation A—A. A plurality of magnets (7) are mounted on an inner peripheral surface of the flywheel (3) so as to rotate therewith. A stator core (10) has a plurality of teeth (12) protruded outwardly in a diametral direction, and is disposed in opposition to the magnets (7). Conductive wires are wound around the teeth (12), respectively, to form magneto coils (11). The stator core (10) has a laminated core (15) formed of a plurality of magnetic sheet steel plates laminated one over another, and a pair of end plates (16, 17) disposed so as to sandwich opposite side surfaces of the laminated core (15). At least one of the pair of end plates (16, 17) is made of aluminum whose heat radiation is higher than the magnetic sheet steel plates.

Abstract: In a hologram device which records information of an interference fringe of signal light and reference light onto a hologram recording medium and which reproduces the recorded information by emitting the reference light onto a recording area of the hologram recording medium, the device includes a recording/reproducing controller performing a control operation of repeatedly recording the information and reproducing the recorded information immediately after the recording of the information in an alternating fashion.

Abstract: A magnetoelectric generator includes a bowl-like flywheel (3) having a bottom portion (6) formed with ventilation holes (20), a plurality of permanent magnets (7) secured to an inner circumferential surface of the flywheel (3), a stator core (10) disposed within the flywheel (3) and having peripheral side surfaces facing the permanent magnets (7), and a coil assembly (11) implemented by winding an electric conductor on the core (10). Electricity is induced in the coil assembly (11) by AC magnetic field produced by rotating the flywheel (3). A peripheral edge portion of each ventilation hole (20) is formed with a projecting portion (21) by plastic deformation, which protrudes toward the coil assembly (11) for producing turbulent air flows internally of the flywheel (3) upon rotation of the flywheel (3).

Abstract: A recording medium (1) for hologram comprises a hologram recording layer (3) comprised of photo-polymer layer is formed on a base (2) comprised of colorless and transparent resin film, etc. and a protective layer (4) comprised of colorless and transparent resin film, etc. formed on the hologram recording layer (3). As such base (2) and protective layer (4), material having less double refraction is used. Optical axis of double refraction when such components are configured to be strip-shaped is allowed to be a direction of the longer side or a direction of the shorter side.

Abstract: A hologram recording device for recording interference fringes between reference light and signal light modulated by data displayed in a spatial modulator in a hologram recording material, the hologram recording device including a phase mask for diffusing light, the phase mask being disposed in an optical system that the signal light passes, wherein a minimum unit of a light diffusing pattern formed in the phase mask is a natural number of times a minimum unit of display data of the spatial modulator.