SELF-BALANCING POSITION SENSITIVE DETECTOR

    公开(公告)号:US20170256659A1

    公开(公告)日:2017-09-07

    申请号:US15501961

    申请日:2016-06-10

    Abstract: A self-balancing optical position sensitive detector includes a pair of spaced apart, parallel, longitudinally extending doped regions on a first surface on a front side of a substrate 16 of opposite doping type with contact pads on the front side at respective ends of a first doped region of the pair. A voltage source applies a potential difference between the contact pads of the first doped region. On the front side, a contact pad of the second doped region of the pair provides an analog output signal representative of a longitudinal position of a center of gravity of an incident light pattern along the doped regions without external circuitry processing the output signal to obtain a readout of the longitudinal position. A resistive line may directly overly, abut and be in contact with at least a portion of the first doped region. A conductive line may directly overly, abut and be in contact with at least a portion of the second doped region. No backside contact or processing of the substrate is required or employed.

    PHOTOELECTRIC SENSOR AND CONTROL METHOD THEREOF

    公开(公告)号:US20170248735A1

    公开(公告)日:2017-08-31

    申请号:US15384325

    申请日:2016-12-20

    Inventor: Qi HONG

    CPC classification number: G01V8/12 G01J1/44 G01V8/10

    Abstract: A photoelectric sensor and a control method thereof are provided, the photoelectric sensor includes a driving pulse generating unit, generating a driving pulse of different cycles; a light-emitting part, receiving the driving pulse to emit light; a light receiving part, receiving the light reflected by a detected object to generate a light receiving signal; an output unit, processing the light receiving signal to output a detection signal; and a control unit, controlling the driving pulse generating unit to generate a first driving pulse of a sleep cycle in usual, and triggered by a variation of the detection signal to control the driving pulse generating unit to generate a specified number of second driving pulses of a duty cycles, the duty cycle is formed by two or more specific cycles, an average of the specific cycles serves as the duty cycle, and the duty cycle is shorter than the sleep cycle.

    Spectrophotometer and spectrophotometric measurement method

    公开(公告)号:US09746374B2

    公开(公告)日:2017-08-29

    申请号:US14424442

    申请日:2014-02-26

    Inventor: Hisashi Shiraiwa

    Abstract: A spectrophotometer includes a photodetection unit configured to convert received light into an electric signal to output the electric signal; a circuit unit including a plurality of gain amplifiers and a plurality of AD converters configured to amplify an output signal from the photodetection unit by a plurality of gains using the plurality of gain amplifiers and configured to convert the amplified output signals into digital signals using the plurality of AD converters to output the digital signals as a plurality of pieces of light amount data; a saturation determination unit configured to determine whether or not each of the plurality of pieces of light amount data from the circuit unit has been saturated; and a measurement result calculation unit configured to calculate, in accordance with a result of the determination by the saturation determination unit, a measurement result of the received light using a part or all of the plurality of pieces of light amount data.

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