Abstract: A current sensor includes a casing including a pair of arms and coupling part, multiple magneto-electric transducers arranged on the circumference of a virtual ellipse whose major axis or minor axis extends between the arms, a support disposed obliquely relative to the major axis or the minor axis of the virtual ellipse within an angle formed by the major axis and the minor axis so as to be close to one of the arms when viewed from the center of a wire disposed and fastened between the arms, and a band wound around a circumferential surface of the wire fastened between the arms, part of the band being caught by the support, the wire being fastened by the band such that the central axis or center of the wire is held close to the support.

Abstract: A current sensor includes a magnetic sensor module including a plurality of magnetic sensor units connected in series. The magnetic sensor units each include a first magnetic sensor element and a second magnetic sensor element which have sensitivity axes oriented in opposite directions. A first terminal of the first magnetic sensor unit is connected to a first potential source. A third terminal of the first magnetic sensor unit is connected to a second potential source. A second terminal and a fourth terminal of the last magnetic sensor unit are connected to constitute a sensor output terminal. The first terminal of each of the magnetic sensor units excluding the first magnetic sensor unit is connected to the second terminal of the next magnetic sensor unit and the third terminal thereof is connected to the fourth terminal of the next magnetic sensor unit.

Abstract: A current sensor includes first and second current paths each including a first conductive portion and second and third conductive portions extending in the X direction from both ends of the first conductive portion, and being neighboring and apart in the Y direction; and first and second magnetoelectric conversion elements arranged with the first conductive portion of the first current path interposed therebetween, and having sensitive axes along the Y direction. The second and third conductive portions of each of the first and second current paths are apart in the Z direction. The second conductive portion of the second current path is arranged in the Y direction with respect to the first and second magnetoelectric conversion elements. Perpendicular lines from the center line of the second conductive portion of the second current path to the first and second magnetoelectric conversion elements have the same direction and equivalent lengths.

Abstract: A current sensor includes a first magnetic sensor and a second magnetic sensor which are configured to detect an induced magnetic field from target current to be measured flowing through a current line. The first and second magnetic sensors each include a magnetoresistive element that includes a free magnetic layer and a hard bias layer applying a bias magnetic field to the free magnetic layer. The bias magnetic field in the magnetoresistive element of the first magnetic sensor is oriented opposite to the bias magnetic field in the magnetoresistive element of the second magnetic sensor.

Abstract: A current sensor includes a first support configured to include a cutout portion, a first magnetic detector element group configured to be provided in the first support, a second support configured to include a cutout portion, and a second magnetic detector element group configured to be provided in the second support. The cutout portion includes a supporting surface supporting a current line. In the current sensor, when the current line conducting therethrough a current to be measured is attached, the first support and the second support are displaced in the circumferential direction of the current line and fixed, and the current line is supported by supporting surfaces, in different positions in the axis line direction of the corresponding current line.

Abstract: A current sensor includes a first magnetic sensor and a second magnetic sensor which are configured to detect an induced magnetic field from target current to be measured flowing through a current line. The first and second magnetic sensors each include a magnetoresistive element that includes a free magnetic layer and a hard bias layer applying a bias magnetic field to the free magnetic layer. The bias magnetic field in the magnetoresistive element of the first magnetic sensor is oriented opposite to the bias magnetic field in the magnetoresistive element of the second magnetic sensor.

Abstract: A current sensor includes a casing including a pair of arms and coupling part, multiple magneto-electric transducers arranged on the circumference of a virtual ellipse whose major axis or minor axis extends between the arms, a support disposed obliquely relative to the major axis or the minor axis of the virtual ellipse within an angle formed by the major axis and the minor axis so as to be close to one of the arms when viewed from the center of a wire disposed and fastened between the arms, and a band wound around a circumferential surface of the wire fastened between the arms, part of the band being caught by the support, the wire being fastened by the band such that the central axis or center of the wire is held close to the support.

Abstract: A current sensor includes first and second current paths each including a first conductive portion and second and third conductive portions extending in the X direction from both ends of the first conductive portion, and being neighboring and apart in the Y direction; and first and second magnetoelectric conversion elements arranged with the first conductive portion of the first current path interposed therebetween, and having sensitive axes along the Y direction. The second and third conductive portions of each of the first and second current paths are apart in the Z direction. The second conductive portion of the second current path is arranged in the Y direction with respect to the first and second magnetoelectric conversion elements. Perpendicular lines from the center line of the second conductive portion of the second current path to the first and second magnetoelectric conversion elements have the same direction and equivalent lengths.

Abstract: A current sensor includes a magnetic sensor module including a plurality of magnetic sensor units connected in series. The magnetic sensor units each include a first magnetic sensor element and a second magnetic sensor element which have sensitivity axes oriented in opposite directions. A first terminal of the first magnetic sensor unit is connected to a first potential source. A third terminal of the first magnetic sensor unit is connected to a second potential source. A second terminal and a fourth terminal of the last magnetic sensor unit are connected to constitute a sensor output terminal. The first terminal of each of the magnetic sensor units excluding the first magnetic sensor unit is connected to the second terminal of the next magnetic sensor unit and the third terminal thereof is connected to the fourth terminal of the next magnetic sensor unit.

Abstract: A current sensor includes a magnetic balance sensor and a switching circuit. The magnetic balance sensor includes a feedback coil which is disposed near a magnetic sensor element varying in characteristics due to application of an induction field caused by measurement current and which produces a canceling magnetic field canceling the induction field. The switching circuit switches between magnetic proportional detection and magnetic balance detection. The magnetic proportional detection is configured to output a voltage difference as a sensor output. The magnetic balance detection is configured to output, as a sensor output, a value corresponding to current flowing through the feedback coil when a balanced state in which the induction field and the canceling magnetic field cancel each other out is reached after the feedback coil is energized by the voltage difference.

Abstract: A current sensor includes a magnetic balance sensor and a switching circuit. The magnetic balance sensor includes a feedback coil which is disposed near a magnetic sensor element varying in characteristics due to application of an induction field caused by measurement current and which produces a canceling magnetic field canceling the induction field. The switching circuit switches between magnetic proportional detection and magnetic balance detection. The magnetic proportional detection is configured to output a voltage difference as a sensor output. The magnetic balance detection is configured to output, as a sensor output, a value corresponding to current flowing through the feedback coil when a balanced state in which the induction field and the canceling magnetic field cancel each other out is reached after the feedback coil is energized by the voltage difference.

Abstract: Disclosed is a hologram reproducing device and a hologram reproducing method capable of reading hologram data at a high speed with low power consumption. When a predetermined voltage is applied to some of the signal electrodes and the scanning electrodes arranged in a matrix, a pixel disposed at an intersection of the signal electrode and the scanning electrode is set as a transmission region, and reproduction light emitted from a hologram recording medium passes through a light control member through the transmission region and is then incident on a light receiving unit. Then, hologram data is reproduced. It is possible to switch the reproduction light passing through the light control member only by changing a combination of voltages applied to the signal electrode and the scanning electrode. Therefore, it is possible to improve the read speed of hologram data.

Abstract: A hologram information reproducing device is described which can reproduce information from a recording medium on which hologram information is recorded, and which can be downsized. In one aspect, when light from a light source is emitted, the light is converted into parallel reference light, by a lens of an optical system. A mirror changes the orientation of the reference light so that it is oriented obliquely downward towards a recording medium. More specifically, as viewed from the top, the mirror changes a path of the light from the light source unit by approximately 90 degrees. In addition, as viewed from the side, the mirror changes the path of the light from the light source unit downward by approximately 45 degrees. Since an interference pattern recorded on the recording medium is a Bragg grating, when the reference light illuminates a recording area of the recording medium, a reproduction light is obtained by Bragg diffraction.

Abstract: A light-shielding member having a pinhole filter is disposed at a boundary between reference light emitted from a light source and reproduction light output from a holographic recording medium. The reproduction light passes through a pinhole formed on the pinhole filter and enters a light-shielded space in which a photodetector member is disposed. The pinhole is disposed at a position of a beam waist BW at which the beam diameter is at a minimum. Therefore, the photodetector member is prevented from detecting light other than the reproduction light. The pinhole filter includes the transparent substrate as a base material, and therefore blocks dust from entering the light-shielded space.

Abstract: Almost all regions of a liquid crystal element 24 is used as a reproduction light transmission region. Through the reproduction light transmission region, a large volume of reproduction light 25a, 26a, and 27a transmits, and the light is received on a light reception part 29. Then, reproduction initial setting for adjusting an incident position, an incident angle ?2, a wavelength, and the like of reproduction reference light 28 is performed. After the reproduction initial setting, the reproduction light transmission region is narrowed to transmit only certain hologram data through the reproduction light transmission region, the light is received on the light reception part 29, and hologram reproduction is performed. In the present invention, the reproduction initial setting can be easily and appropriately performed. Further, the succeeding hologram reproduction can be appropriately performed.

Abstract: There is provided a holographic device that reproduces information by irradiating light beams emitted from a light beam generator onto a recording medium formed with a hologram. The light beam generator has a substrate and a plurality of light emitting units provided on the substrate, and each of the plurality of light emitting units is composed of a laser oscillator for emitting laser light having a wider wavelength bandwidth than single-mode laser light. In addition, a condensing means is provided between the light beam generator and the recording medium in order to condense a plurality of light beams emitted from each of the light emitting units onto approximately the same location of the recording medium.

Abstract: A polarization separating element which can be easily manufactured without increasing the cost and can separate light into plural directions by using one sheet. A polarization separating element includes a structural birefringence body having a base body made of a photosensitive material of which periodic refractive index distributions are formed in plural directions and at least a pair of surfaces is formed in the base body in which one surface is a light incident location and the other surface is a light emitting location.

Abstract: A hologram information reproducing device is described which can reproduce information from a recording medium on which hologram information is recorded, and which can be downsized. In one aspect, when light from a light source is emitted, the light is converted into parallel reference light, by a lens of an optical system. A mirror changes the orientation of the reference light so that it is oriented obliquely downward towards a recording medium. More specifically, as viewed from the top, the mirror changes a path of the light from the light source unit by approximately 90 degrees. In addition, as viewed from the side, the mirror changes the path of the light from the light source unit downward by approximately 45 degrees. Since an interference pattern recorded on the recording medium is a Bragg grating, when the reference light illuminates a recording area of the recording medium, a reproduction light is obtained by Bragg diffraction.

Abstract: A hologram reproducing head that reproduces information recorded as a hologram (11) on a recording medium (10) includes a light source (3) that emits a reference beam (21) for reproducing the hologram (11) and a light receiver (4) that receives reproduced light (22) from the hologram (11), both of which are disposed on one substrate (2), and a transparent plate (5) opposed to the substrate (2) to transmit emitting beam (20) from the light source (3) and the reproduced light (22). The transparent plate (5) includes an optical path changing hologram (5a) located at a position opposed to the light source (3) in order to diffract the reference beam (21) and then introduce it into the hologram (11). A pinhole filter (6a) is provided on the surface of the transparent plate (5) at a position where the reproduced light (22) from the hologram (11) is transmitted.

Abstract: There is provided a holographic device that reproduces information by irradiating light beams emitted from a light beam generator onto a recording medium formed with a hologram. The light beam generator has a substrate and a plurality of light emitting units provided on the substrate, and each of the plurality of light emitting units is composed of a laser oscillator for emitting laser light having a wider wavelength bandwidth than single-mode laser light. In addition, a condensing means is provided between the light beam generator and the recording medium in order to condense a plurality of light beams emitted from each of the light emitting units onto approximately the same location of the recording medium.