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93 条记录 (耗时 0.019 秒)

    GAIN CALIBRATION FOR AN IMAGING SYSTEM
    63.
    发明申请
    GAIN CALIBRATION FOR AN IMAGING SYSTEM 有权
    用于成像系统的增益校准

    公开(公告)号：US20160056785A1

    公开(公告)日：2016-02-25

    申请号：US14829490

    申请日：2015-08-18

    申请人： Seek Thermal, Inc.

    发明人： Jason Wolfe ,  Willliam J. Parrish ,  Ross Williams

    IPC分类号： H03G3/30 ,  G01J5/22

    CPC分类号： H03G3/3084 ,  G01J1/18 ,  G01J1/44 ,  G01J5/22 ,  G01J5/34 ,  G01J2001/4406 ,  G01J2001/444 ,  G01J2005/0048 ,  G01J2005/0077 ,  G01R27/2605 ,  H01G7/00 ,  H04N5/33 ,  H04N5/3651 ,  H04N5/3655

    摘要： An imaging system includes an array of photodetectors and electronic circuitry associated with the photodetectors to read intensity values from the photodetectors. The electronic circuitry can include an integrator with an integrator capacitor having a nominal capacitance, wherein a gain of the electronic circuitry associated with a photodetector can depend at least in part on the actual capacitance of the integrator capacitor, the actual capacitance differing from the nominal capacitance. The imaging system can be configured to determine a gain factor that depends at least in part on the actual capacitance and/or a signal voltage input to the integrator. The imaging system can be configured to apply the gain factor based at least in part on the actual capacitance of the integrator capacitor calculated. The imaging system can be a thermal imaging system and may include an infrared camera core.

    摘要翻译： 成像系统包括与光电检测器相关联的光电检测器和电子电路的阵列，以从光电检测器读取强度值。 电子电路可以包括具有标称电容的积分器电容器的积分器，其中与光电检测器相关联的电子电路的增益至少部分取决于积分电容器的实际电容，实际电容不同于标称电容 。 成像系统可以被配置为确定至少部分地取决于输入到积分器的实际电容和/或信号电压的增益因子。 成像系统可以被配置为至少部分地基于所计算的积分电容器的实际电容来施加增益因子。 成像系统可以是热成像系统，并且可以包括红外相机芯。

    GAIN-RANGING CHARGE AMPLIFIER
    64.
    发明申请
    GAIN-RANGING CHARGE AMPLIFIER 有权
    增益充电放大器

    公开(公告)号：US20140374570A1

    公开(公告)日：2014-12-25

    申请号：US14012154

    申请日：2013-08-28

    申请人： Camille L. HUIN ,  Gary R. CARREAU

    发明人： Camille L. HUIN ,  Gary R. CARREAU

    IPC分类号： H04N5/378

    CPC分类号： H04N5/378 ,  G01J1/44 ,  G01J2001/4406

    摘要： The system may include a pixel array, a selector, a sampler, and a converter. The pixel array may generate output signals that representing radiation incident upon the pixel array. The selector may select one of the output signals. The sampler may sample the selected output signal. The converter may generate a digital signal based upon the selected output signal. The sampler may include a charge integrator that compensates for parasitic capacitance of the selector by selecting a first feedback capacitance to obtain a first sample, and after obtaining the first sample, selecting a second feedback capacitance to obtain a second sample. The first feedback capacitance may be greater than the second feedback capacitance.

    摘要翻译： 该系统可以包括像素阵列，选择器，采样器和转换器。 像素阵列可以生成表示入射在像素阵列上的辐射的输出信号。 选择器可以选择输出信号之一。 采样器可以对选定的输出信号进行采样。 转换器可以基于所选择的输出信号产生数字信号。 采样器可以包括电荷积分器，其通过选择第一反馈电容来获得第一采样来补偿选择器的寄生电容，并且在获得第一采样之后，选择第二反馈电容以获得第二采样。 第一反馈电容可以大于第二反馈电容。

    Photodetector
    65.
    发明申请
    Photodetector 有权
    光电检测器

    公开(公告)号：US20040036012A1

    公开(公告)日：2004-02-26

    申请号：US10648110

    申请日：2003-08-26

    发明人： Atsushi Horiguchi ,  Tohru Mori

    IPC分类号： H01J040/14

    CPC分类号： G01J1/44 ,  G01J2001/4406

    摘要： A photodetector continuously measure quantity of light ranging from high intensity to low intensity at high speed. The photodetector comprises an operational amplifier, a photodiode connected to an inverting terminal of the operational amplifier for outputting a signal corresponding to quantity of light to be detected, a plurality of feedback resistors differentiated in each resistance value, an analog switch for selectively connecting input terminals thereof to which one ends of the feedback resistors are connected to an output terminal of the operational amplifier except the feedback resistor having the maximum resistance value, or connecting the input terminal thereof which is rendered in a non-connection state to the output terminal of the operational amplifier instead of the feedback resistor having the maximum resistance value, wherein the feedback resistor having the maximum resistance value is connected to the output terminal of the operational amplifier at its one end and to the inverting input terminal of the operational amplifier at its other end, and wherein the other ends of the other feedback resistors are connected to the inverting input terminal of the operational amplifier.

    摘要翻译： 光电探测器连续地测量从高强度到低强度的高光量。 光检测器包括运算放大器，连接到运算放大器的反相端的光电二极管，用于输出对应于待检测光量的信号，在每个电阻值中区分的多个反馈电阻;模拟开关，用于选择性地连接输入端 其中反馈电阻器的一端连接到除了具有最大电阻值的反馈电阻器之外的运算放大器的输出端子，或者将其处于非连接状态的输入端子连接到非连接状态的输出端子 运算放大器代替具有最大电阻值的反馈电阻器，其中具有最大电阻值的反馈电阻器在其一端连接到运算放大器的输出端，并在其另一端连接到运算放大器的反相输入端 ，并且其中另一端的另一端 反馈电阻连接到运算放大器的反相输入端。

    Double-beam spectrophotometer using a photodiode detector
    66.
    发明授权
    Double-beam spectrophotometer using a photodiode detector 失效
    使用光电探测器的双光束分光光度计

    公开(公告)号：US5106190A

    公开(公告)日：1992-04-21

    申请号：US405248

    申请日：1989-09-11

    申请人： Toshiaki Fukuma

    发明人： Toshiaki Fukuma

    IPC分类号： G01J1/16 ,  G01J1/44 ,  G01J3/42

    CPC分类号： G01J1/16 ,  G01J3/42 ,  G01J2001/4242 ,  G01J2001/4406 ,  G01J2001/446

    摘要： A spectrophotometer comprising a light source, a spectroscope which separates the light of light source depending on the wavelengths, chops the light into the first and second light beams and allows the light beams to pass through the reference cell and sample cell, a photodiode which alternately receives the light beams from the reference cell and sample cell, a variable gain amplifier which amplifies a light current of photodiode, an A/D converter which converts and guides the reference output and sample output as the digital values synchronously with the chopping period, and a again setter which sets the gain of the variable gain amplifier depending on the reference output value from the A/D converter.

    Device for measuring light intensity received by a photosensor
    67.
    发明授权
    Device for measuring light intensity received by a photosensor 失效
    用于测量由光电传感器接收的光强度的装置

    公开(公告)号：US4847483A

    公开(公告)日：1989-07-11

    申请号：US137616

    申请日：1987-12-24

    申请人： Takashi Nishibe ,  Shotaro Yokoyama

    发明人： Takashi Nishibe ,  Shotaro Yokoyama

    IPC分类号： G04F10/10 ,  G01J1/44 ,  G01J1/46

    CPC分类号： G01J1/44 ,  G01J2001/4406 ,  G01J2001/446

    摘要： A device for measuring the intensity of light received by a photosensor comprises a photosensor for receiving light and producing a corresponding current and a circuit for integrating the current so that the intensity of the received light is indicated as the time required for the integration value of the integrating circuit to reach a predetermined value. If the intensity of the light is determined to be high at the start of the integration operation the integration value is set to the smaller of two predetermined values. If the intensity of the light is low, the integration value is set to a larger value.

    摘要翻译： 用于测量由光电传感器接收的光的强度的装置包括用于接收光并产生相应电流的光电传感器和用于积分电流的电路，使得接收的光的强度被指示为所述接收光的积分值所需的时间 积分电路达到预定值。 如果在积分操作开始时将光的强度确定为高，则将积分值设置为两个预定值中的较小值。 如果光的强度低，则积分值被设定为较大的值。

    Digital gain controlled current to voltage amplifier
    68.
    发明授权
    Digital gain controlled current to voltage amplifier 失效
    数字增益控制电流到电压放大器

    公开(公告)号：US4669877A

    公开(公告)日：1987-06-02

    申请号：US704368

    申请日：1985-02-22

    申请人： Charles M. Wittmer

    发明人： Charles M. Wittmer

    IPC分类号： G01J1/44 ,  G01J3/42 ,  H03G3/20 ,  H01J39/12

    CPC分类号： H03G3/3026 ,  G01J3/42 ,  G01J2001/4406 ,  G01J2001/4453

    摘要： A digital gain controlled current to voltage amplifier having particular utility for interfacing with and forming part of a spectrophotometer system with a photomultiplier tube being responsive to light for producing an analog current proportional to the intensity thereof. The digital gain controlled current to voltage amplifier incorporates a current switched multiplying digital-to-analog converter inside its feedback loop. In this manner, the feedback loop impedance may be maintained constant as its gain is varied under control of a software programmed microcomputer.

    摘要翻译： 数字增益控制电流到电压放大器具有用于与分光光度计系统连接并形成分光光度计系统的一部分的特别实用性，其中光电倍增管响应于光以产生与其强度成比例的模拟电流。 数字增益控制电流到电压放大器在其反馈环路内部包含电流开关倍增数模转换器。 以这种方式，当软件编程的微型计算机的控制下，其增益变化时，反馈回路阻抗可以保持恒定。