Abstract: A rotation number detector according to an embodiment is a rotation number detector that detects the number of rotations of a magnet attached to a rotating body by using a power generation unit. The power generation unit includes N (N is a natural number equal to or larger than 1) power generation elements, each including a magnetic wire in which magnetization reversal occurs due to a large Barkhausen effect and a pickup coil that is wound around the magnetic wire. The magnetic wire is longer than a wound portion of the pickup coil in an extension direction of the magnetic wire of the power generation elements. The magnetic wire is set above a rotation center of the magnet.

Abstract: To obtain a position detection device capable of detecting highly accurate and robust position by suppressing affect of error detection of an edge, provided is a configuration for performing a validity determination of edges detected by binarizing an image signal (21) converted by a light-receiving element (3) for receiving light irradiated from a light source (1) toward a scale (2) having a code pattern, and performing position detection after removing the edges determined to be invalid as edges that have been affected by foreign matter and the like among the edges on which the validity determination has been performed.

Abstract: Provided is an absolute encoder capable of detecting the absolute angle at high resolution and with high precision. An image sensor receives light in an absolute value code pattern of a scale, an edge detecting unit detects from the received light signal an edge pixel position and an edge direction, and an edge position correcting unit corrects the edge pixel position based on the edge direction. A phase detecting unit detects from the corrected edge pixel position the phase shift amount of a shift from a reference pixel position of the image sensor, and a high precision detection unit uses a rough absolute position detected by a rough detection unit and the phase shift amount detected by the phase detecting unit to detect the absolute position with high precision.

Abstract: Provided is an absolute encoder capable of detecting the absolute angle at high resolution and with high precision. An image sensor receives light in an absolute value code pattern of a scale, an edge detecting unit detects from the received light signal an edge pixel position and an edge direction, and an edge position correcting unit corrects the edge pixel position based on the edge direction. A phase detecting unit detects from the corrected edge pixel position the phase shift amount of a shift from a reference pixel position of the image sensor, and a high precision detection unit uses a rough absolute position detected by a rough detection unit and the phase shift amount detected by the phase detecting unit to detect the absolute position with high precision.

Abstract: A radioactivity analyzing apparatus for analyzing a radionuclide contained in a sample material. The apparatus includes a radiation detector that detects a radiation to be detected emitted from the sample material and a radiation analyzer configured to analyze the radiation based on an output from the radiation detector. The radiation analyzer includes a pulse-height analyzer configured to extract a pulse-height distribution from a pulse signal being output from the radiation detector and depending on the radiation, an inverse-problem operator configured to perform an inverse-problem solution of the pulse-height distribution to extract an energy spectrum of the radiation, and a deterioration detector configured to determine a deterioration state of the radiation detector based on the extracted energy spectrum.

Abstract: An image reader configured to read an image of an object-to-be-read includes: a board, a line sensor assembly including a plurality of photosensitive elements formed on one surface of the board along a main scanning direction, a lens array assembly including a plurality of lenses arrayed along the main scanning direction, and configured to focus the reflected light onto the line sensor assembly, a light shield configured to support a portion of the lens array assembly at the line-sensor-assembly side or to be in contact with the portion of the lens array assembly at the line-sensor-assembly side, and to block light other than the light focused by the lens array assembly, and a transparent member made of transparent material, formed with a retainer space where the lens array assembly and the light shield are retained, and covering a portion of the lens array assembly at the object-to-be-read side and the light shield.

Abstract: An encoder includes a first multiple rotation counter that generates first multiple rotation data using a rotation signal indicating one rotation of a rotational shaft of a motor, a second multiple rotation counter that generates second multiple rotation data using the rotation signal, a first cumulative-number calculation unit that calculates first accumulated multiple rotation data using an angle signal indicating a rotational angle of the rotational shaft, a second cumulative-number calculation unit that calculates second accumulated multiple rotation data using the angle signal, and a first comparative diagnosis unit that diagnoses whether the encoder has a fault by performing a comparison to determine whether the first multiple rotation data, the second multiple rotation data, the first accumulated multiple rotation data, and the second accumulated multiple rotation data are a same value.

Abstract: An encoder includes a first multiple rotation counter that generates first multiple rotation data using a rotation signal indicating one rotation of a rotational shaft of a motor, a second multiple rotation counter that generates second multiple rotation data using the rotation signal, a first cumulative-number calculation unit that calculates first accumulated multiple rotation data using an angle signal indicating a rotational angle of the rotational shaft, a second cumulative-number calculation unit that calculates second accumulated multiple rotation data using the angle signal, and a first comparative diagnosis unit that diagnoses whether the encoder has a fault by performing a comparison to determine whether the first multiple rotation data, the second multiple rotation data, the first accumulated multiple rotation data, and the second accumulated multiple rotation data are a same value.

Abstract: The invention is related to a magnetic substance detection device for detecting a magnetic substance, including: a magnetoresistive sensor arranged in the middle of a movement path of the magnetic substance; and a lower magnet in which a south pole and a north pole are arrayed along the movement direction of the magnetic substance; and a upper magnet in which a north pole and a south pole are arrayed along the movement direction of the magnetic substance. The lower and upper magnets are arranged with the movement path of the magnetic substance interposed so that the south pole of the lower magnet and the north pole of the upper magnet are opposed to each other, and the north pole of the lower magnet and the south pole of the upper magnet are opposed to each other, whereby the magnetic substance can be detected with high accuracy.

Abstract: In an elevator car position detection device, a magnetic field generator generates an eddy current magnetic field on an identification member, and a magnetic field detector detects the eddy current magnetic field generated on the identification member. The identification member includes a plurality of conductors which are continuously arranged along an ascending and descending direction of a car, and are relatively different in a plate thickness with respect to a skin depth of an eddy current generated by the magnetic field generator on the identification member. A shape of at least a part of a boundary between the adjacent conductors is a straight line or a curve tilted with respect to a direction orthogonal to the ascending and descending direction of the car.

Abstract: A rotation number detector according to an embodiment is a rotation number detector that detects the number of rotations of a magnet attached to a rotating body by using a power generation unit. The power generation unit includes N (N is a natural number equal to or larger than 1) power generation elements, each including a magnetic wire in which magnetization reversal occurs due to a large Barkhausen effect and a pickup coil that is wound around the magnetic wire. The magnetic wire is longer than a wound portion of the pickup coil in an extension direction of the magnetic wire of the power generation elements. The magnetic wire is set above a rotation center of the magnet.

Abstract: An image reader configured to read an image of an object-to-be-read includes: a board, a line sensor assembly including a plurality of photosensitive elements formed on one surface of the board along a main scanning direction, a lens array assembly including a plurality of lenses arrayed along the main scanning direction, and configured to focus the reflected light onto the line sensor assembly, a light shield configured to support a portion of the lens array assembly at the line-sensor-assembly side or to be in contact with the portion of the lens array assembly at the line-sensor-assembly side, and to block light other than the light focused by the lens array assembly, and a transparent member made of transparent material, formed with a retainer space where the lens array assembly and the light shield are retained, and covering a portion of the lens array assembly at the object-to-be-read side and the light shield.

Abstract: A radioactivity analyzing apparatus for analyzing a radionuclide contained in a sample material. The apparatus includes a radiation detector that detects a radiation to be detected emitted from the sample material and a radiation analyzer configured to analyze the radiation based on an output from the radiation detector. The radiation analyzer includes a pulse-height analyzer configured to extract a pulse-height distribution from a pulse signal being output from the radiation detector and depending on the radiation, an inverse-problem operator configured to perform an inverse-problem solution of the pulse-height distribution to extract an energy spectrum of the radiation, and a deterioration detector configured to determine a deterioration state of the radiation detector based on the extracted energy spectrum.

Abstract: In a photographing optical system, an autofluorescence barrier filter having a characteristic of transmitting a light having an autofluorescence wavelength and a near-infrared wavelength, and a near-infrared light cut-off filter having a characteristic of transmitting the visible light and blocking the near-infrared light are disposed to be replaceable. In the case of observing a fundus, the fluorescence barrier filter is inserted into an optical path in an observation photographing optical system, so that observation can be performed by using a near-infrared illuminating light. In the case of autofluorescence photographing, the photographing can be performed without filter switching. In the case of color photographing, at the time of observation, the observation is performed using the fluorescence barrier filter, and at the time of photographing, the photographing can be performed using the replaced infrared light cut-off filter.

Abstract: Provided is a magnetic rotation-angle detector that includes a disk-shaped magnet that is magnetized so as to change magnetic poles n times per rotation (where n is an integer equal to or larger than 1); a magnetic-body slit plate that is rotated together with the magnet, where a part having a high magnetic flux permeability and a part having a low magnetic flux permeability are alternately and repeatedly arranged thereon so as to change the magnetic flux permeability m times per rotation (where m is an integer equal to or larger than 2 and m>n); a magnetic sensor that detects magnetism from the magnet when the magnet has passed by through the magnetic-body slit plate; and a calculation unit that obtains the rotation angle of the magnet from the output from the magnetic sensor.

Abstract: An ophthalmologic photographing apparatus includes an optical system, a pedestal, an auxiliary lens configured to be able to be inserted into and retracted from the optical system, a focusing lens, a focusing lens driving unit configured to move the focusing lens along an optical axis, a pedestal position detection unit configured to detect that the pedestal is away from the subject's eye by a predetermined distance, an auxiliary lens insertion detection unit configured to detect that the auxiliary lens is inserted into the optical system, a storage unit configured to store a position of the focusing lens, and a control unit configured to cause the focusing lens driving unit to move the focusing lens to a predetermined position stored in the storage unit based on outputs from the pedestal position detection unit and the auxiliary lens insertion detection unit.

Abstract: A battery-less multi-rotation encoder including detection coils with the Barkhausen effect includes a rotation detection mechanism and a signal processing circuit. The detection coils generate voltage pulses with different positive and negative signs, and transmit them to the signal processing circuit, and the signal processing circuit includes a controller and an adder. The controller can set states of the detection coils to be High or Low and to maintain them at High or Low, based on the positive and negative signs of the respective voltage pulses and no voltage pulse being generated therefrom. The controller is configured to store the states of the respective detection coils in a memory. The adder can update a number of rotations according to the changes in the states of the respective detection coils. The signal processing circuit can determine the rotational angle of a rotational shaft within about 1/4 rotation unit.

Abstract: An ophthalmologic apparatus including a measurement unit configured to measure a subject's eye, a sliding substrate configured to slide the measurement unit with respect to a base via a guide shaft, a plurality of shaft guide members provided on the base and configured to guide the guide shaft in an axial direction thereof, and an inclination reduction unit provided between the plurality of shaft guide members and configured to reduce inclination of the guide shaft with respect to the base.

Abstract: An optical encoder includes: an optical scale having periodical optical patterns and can be relatively and angularly displaced; a projector for irradiating the optical scale with light; a light receiver for receiving light from the optical scale; and a calculator for calculating an absolute rotation angle ? of the optical scale in accordance with a signal from the light receiver. The optical patterns include a plurality of light shielding portions and a plurality of light transmitting portions, each of the portions being located alternately.

Abstract: An imaging control apparatus performs focusing operation to set an imaging optical system for an image sensor in an in-focus state with respect to an object illuminated by a light source by using an object image obtained by imaging the object using the image sensor. The imaging control apparatus changes an imaging setting so as to set the signal-to-noise ratio of an acquired object image during execution of focusing operation for this focusing higher than that during non-execution of the focusing operation.