A position detecting device detects the position of a moving body by using first and second detected signals that have voltage values changing in connection with a movement of the moving body. The position detecting device includes a difference computing unit that computes first and second difference values, the first being the difference between a center voltage of the first detected signal and the voltage value of the first detected signal, and the second being the difference between a center voltage of the second detected signal and the voltage value of the second detected signal. A ratio computing unit computes a difference-sum ratio index in accordance with the ratio of the difference value between the absolute values of the first and second difference values and the absolute value of the second difference value to the sum of the absolute values of the first and second difference values.

Optical position encoding mechanisms and methods for use in reimaged optical imaging systems. In one example, a reimaged optical imaging system includes an imaging detector, an optical component, and at least one light source coupled to the optical component and configured to be reimaged onto the imaging detector, wherein a position of an image of the at least one light source at the imaging detector encodes a position of the optical component relative to the imaging detector.

A method includes a moving step of moving linearly a holder holding parallel to one another in a single row a plurality of connector terminals while measuring a movement distance of the holder with a tip of each of the plurality of connector terminals pointing in a traveling direction, a passage detection step of detecting passage of the tip of each of the plurality of connector terminals at a target point on a path, the target point coinciding with each other in a side view when the path of each of the plurality of connector terminals is viewed in an arrangement direction of the plurality of connector terminals, and a displacement amount acquiring step of acquiring a displacement amount between the tips of the plurality of connector terminals based on the movement distance when the passage is detected for the tip of each of the plurality of connector terminals.

A method includes a moving step of moving linearly a holder holding parallel to one another in a single row a plurality of connector terminals while measuring a movement distance of the holder with a tip of each of the plurality of connector terminals pointing in a traveling direction, a passage detection step of detecting passage of the tip of each of the plurality of connector terminals at a target point on a path, the target point coinciding with each other in a side view when the path of each of the plurality of connector terminals is viewed in an arrangement direction of the plurality of connector terminals, and a displacement amount acquiring step of acquiring a displacement amount between the tips of the plurality of connector terminals based on the movement distance when the passage is detected for the tip of each of the plurality of connector terminals.

A sensor manufacturing method is a method for manufacturing a sensor including a generator that generates a predetermined detection target, a detector that detects the detection target generated by the generator, and a motion body that performs motion in the area in between the generator and the detector. In the method, the generator and the detector are positioned opposite to each other by either curving or bending a substrate including a first portion having the generator installed thereon and a second portion having the detector installed thereon that are formed in an integrated manner, and the substrate and the motion body are made to perform relative movement in such a way that the motion body enters the area in between the generator and the detector.

A sensor manufacturing method is a method for manufacturing a sensor including a generator that generates a predetermined detection target, a detector that detects the detection target generated by the generator, and a motion body that performs motion in the area in between the generator and the detector. In the method, the generator and the detector are positioned opposite to each other by either curving or bending a substrate including a first portion having the generator installed thereon and a second portion having the detector installed thereon that are formed in an integrated manner, and the substrate and the motion body are made to perform relative movement in such a way that the motion body enters the area in between the generator and the detector.

A servo system includes a motor having a stator and a movable element which moves relative to the stator, an encoder which detects at least one of a position and a speed of the movable element of the motor, and a controller including first circuitry which controls operation of the motor based on a detection result of the encoder. The first circuitry of the controller transmits a first command signal that changes a communication speed between the encoder and the controller from a first speed to a second speed which is higher than the first speed, and the encoder includes second circuitry which changes the communication speed between the encoder and the controller to the second speed when the first command signal is received from the controller.