Abstract: An encoder includes: an optical module that detects angular position information indicating an angular position of a rotating disk within one rotation thereof; a magnetic detecting unit that detects multi-rotation information indicating the number of rotations of the disk; a battery that supplies a power to the magnetic detecting unit when an external power is not supplied to the encoder; and a connector that connects connection terminals of the battery to a substrate to which at least one of the optical module and the magnetic detecting unit is connected, via solders in contact with the connection terminals.

Abstract: A force sensor according to embodiments includes a light-emitting unit, a pair of first light detectors, a reflector, and a first frame. The light-emitting unit emits diffuse light. The first light detectors are arranged in a first direction with the light-emitting unit interposed therebetween. The reflector is arranged to face the light-emitting unit on an optical axis of the light-emitting unit and reflects the diffuse light emitted from the light-emitting unit toward the first light detectors. The first frame is deformed in the first direction so that a reflection range of the diffuse light reflected by the reflector is displaced in the first direction.

Abstract: An encoder includes a track having optical effecters arranged to have an absolute pattern in a measurement direction, a light source configured to emit diffusion light to the track, and a light receiving array configured to have light receiving elements arranged in the measurement direction and to receive light reflected or transmitted by the track. The light receiving elements fall within an area which is positioned corresponding to an area between the optical effecters and to which the light reflected by the track dose not reach.

Abstract: An encoder includes a plurality of slit tracks, a point light source, a first light-receiving array, a second light-receiving array, and a third light-receiving array. The plurality of slit tracks respectively comprises a plurality of reflection slits arranged along a measurement direction. The point light source is configured to emit diffusion light to the plurality of slit tracks. The first light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern. The second light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern longer in pitch than other incremental patterns. The third light-receiving array is configured to receive light reflected by the slit track comprising an absolute pattern.

Abstract: An encoder includes a plurality of slit tracks, a point light source, a first to third light-receiving arrays. The plurality of slit tracks respectively comprises a plurality of reflection slits. The point light source emits diffusion light to the plurality of slit tracks. The first light-receiving array receives light reflected by the slit track comprising an incremental pattern. The second light-receiving array receives light reflected by the slit track comprising an incremental pattern longer in pitch than other incremental patterns, and is disposed at a position on a side of a direction where the point light source is disposed, than the first light-receiving array, The third light-receiving array receives light reflected by the slit track comprising an absolute pattern, and is disposed at a position on a side of a direction where the point light source is disposed, than the first light-receiving array.

Abstract: An optical module includes: a light source configured to emit diffusion light to tracks; one light receiving array and another light receiving array which are arranged across the light source in a width direction substantially vertical to the measurement direction; a light receiving array arranged between the one light receiving array and the light source, and configured to receive light which is reflected at the tracks having a first incremental pattern; and a light receiving array arranged between the another first light receiving array and the light source, and configured to receive light which is reflected at the tracks having a second incremental pattern which pitch is longer than a pitch of the first incremental pattern.

Abstract: An encoder includes an object body having an absolute pattern formed along a measurement direction, a light source positioned such that the light source emits light to the absolute pattern of the object body, and light receiving elements aligned along the measurement direction such that the light receiving elements receive the light transmitted through or reflected by the absolute pattern of the object body. The light receiving elements include a first light receiving element having a polygonal shape and having a first region in the polygonal shape and a second region formed on an inner side of the first region such that the second region has an optical sensitivity lower than an optical sensitivity of the first region and that the first region includes corner portions of the polygonal shape.

Abstract: An encoder includes an absolute pattern, a light source, and a plurality of light reception elements. The absolute pattern is disposed in a measurement direction. The light source is configured to emit light to the absolute pattern. The plurality of light reception elements are arranged in the measurement direction and configured to receive the light emitted from the light source and transmitted through or reflected by the absolute pattern. The plurality of light reception elements include at least one first light reception element having an edge in the measurement direction. The edge is inclined relative to a width direction perpendicular to the measurement direction.

Abstract: The encoder includes a plurality of slit tracks, a point light source, two first light-receiving arrays, two second light-receiving arrays, and a third light-receiving array. The plurality of slit tracks respectively comprises a plurality of reflection slits arranged along a measurement direction. The point light source is configured to emit diffusion light to the plurality of slit tracks. The two first light-receiving arrays are disposed sandwiching the point light source in a width direction substantially orthogonal to the measurement direction. The two second light-receiving arrays are disposed sandwiching the point light source in the measurement direction. The third light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern that differs in pitch from other incremental patterns, and is disposed at a position in a direction where the first light-receiving array is disposed than the point light source.

Abstract: A rotation detector provided in a motor unit according to an embodiment includes a first support and a second support, a pair of magnetic field generator, at least one magnetic field detector, and a first magnetic member and a second magnetic member. The pair of magnetic field generator is provided on the first support in a manner facing the second support, and has opposite polarities. The magnetic field detector is formed by winding a coil around a magnetic element whose magnetized direction changes in the longitudinal direction, and is provided on the second support in such a manner that a longitudinal-direction side of the magnetic element faces the first support. Each of the first magnetic member and the second magnetic member is made of a magnetic material, and covers a longitudinal-direction end of the magnetic field detector facing the first support.

Abstract: A linear motor includes a stator and an armature that faces the stator with a gap therebetween. The stator has an elongated shape extending so as to cross a direction in which the stator faces the armature, and includes a plurality of salient poles that are arranged along a longitudinal direction of the stator and protrude toward the armature. The armature includes an armature core including a tooth that protrudes toward the stator, an armature winding wound around the tooth, a plurality of permanent magnets disposed on an end side of the tooth so as to be arranged along the longitudinal direction of the stator, and a magnetic-field sensor that detects a magnetic field which is generated by the plurality of permanent magnets and which passes through the plurality of salient poles.

Abstract: This disclosure discloses a servomotor production method of a servomotor including a motor and an encoder. The encoder includes a rotating disk and an optical module. The rotating disk is mounted on a shaft of the motor and includes at least one concentric slit formed around a disk center. The optical module is provided with a light receiving element configured to receive light emitted from a light source and subjected to an action of the concentric slit on a substrate. The servomotor production method includes adjusting a position of the optical module with respect to the rotating disk by using the concentric slit by means of an output of the light receiving element when the optical module is fixed and arranged facing the rotating disk.

Abstract: A force sensor according to embodiments includes a light-emitting unit, a pair of first light detectors, a reflector, and a first frame. The light-emitting unit emits diffuse light. The first light detectors are arranged in a first direction with the light-emitting unit interposed therebetween. The reflector is arranged to face the light-emitting unit on an optical axis of the light-emitting unit and reflects the diffuse light emitted from the light-emitting unit toward the first light detectors. The first frame is deformed in the first direction so that a reflection range of the diffuse light reflected by the reflector is displaced in the first direction.

Abstract: An encoder includes a track having optical effecters arranged to have an absolute pattern in a measurement direction, a light source configured to emit diffusion light to the track, and a light receiving array configured to have light receiving elements arranged in the measurement direction and to receive light reflected or transmitted by the track. The light receiving elements fall within an area which is positioned corresponding to an area between the optical effecters and to which the light reflected by the track dose not reach.

Abstract: An optical module includes: a light source configured to emit diffusion light to tracks; one light receiving array and another light receiving array which are arranged across the light source in a width direction substantially vertical to the measurement direction; a light receiving array arranged between the one light receiving array and the light source, and configured to receive light which is reflected at the tracks having a first incremental pattern; and a light receiving array arranged between the another first light receiving array and the light source, and configured to receive light which is reflected at the tracks having a second incremental pattern which pitch is longer than a pitch of the first incremental pattern.

Abstract: The encoder includes a plurality of slit tracks, a point light source, two first light-receiving arrays, two second light-receiving arrays, and a third light-receiving array. The plurality of slit tracks respectively comprises a plurality of reflection slits arranged along a measurement direction. The point light source is configured to emit diffusion light to the plurality of slit tracks. The two first light-receiving arrays are disposed sandwiching the point light source in a width direction substantially orthogonal to the measurement direction. The two second light-receiving arrays are disposed sandwiching the point light source in the measurement direction. The third light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern that differs in pitch from other incremental patterns, and is disposed at a position in a direction where the first light-receiving array is disposed than the point light source.

Abstract: An encoder includes a plurality of slit tracks, a point light source, a first light-receiving array, and a second light-receiving array. The plurality of slit tracks respectively comprises a plurality of reflection slits arranged along a measurement direction. The point light source is configured to emit diffusion light to the plurality of slit tracks. The first light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern, and is disposed at a position in a first direction than the point light source. The second light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern that differs in pitch from the slit track corresponding to the first light-receiving array, and is disposed at a position in a second direction than the point light source. The second direction forms an angle ? with respect to the first direction.

Abstract: An encoder includes a plurality of slit tracks, a point light source, a first light-receiving array, a second light-receiving array, and a third light-receiving array. The plurality of slit tracks respectively comprises a plurality of reflection slits arranged along a measurement direction. The point light source is configured to emit diffusion light to the plurality of slit tracks. The first light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern. The second light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern longer in pitch than other incremental patterns. The third light-receiving array is configured to receive light reflected by the slit track comprising an absolute pattern.

Abstract: An encoder includes a plurality of slit tracks, a point light source, a first to third light-receiving arrays. The plurality of slit tracks respectively comprises a plurality of reflection slits. The point light source emits diffusion light to the plurality of slit tracks. The first light-receiving array receives light reflected by the slit track comprising an incremental pattern. The second light-receiving array receives light reflected by the slit track comprising an incremental pattern longer in pitch than other incremental patterns, and is disposed at a position on a side of a direction where the point light source is disposed, than the first light-receiving array, The third light-receiving array receives light reflected by the slit track comprising an absolute pattern, and is disposed at a position on a side of a direction where the point light source is disposed, than the first light-receiving array.

Abstract: A linear motor includes a stator and an armature that faces the stator with a gap therebetween. The stator has an elongated shape extending so as to cross a direction in which the stator faces the armature, and includes a plurality of salient poles that are arranged along a longitudinal direction of the stator and protrude toward the armature. The armature includes an armature core including a tooth that protrudes toward the stator, an armature winding wound around the tooth, a plurality of permanent magnets disposed on an end side of the tooth so as to be arranged along the longitudinal direction of the stator, and a magnetic-field sensor that detects a magnetic field which is generated by the plurality of permanent magnets and which passes through the plurality of salient poles.