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    • 1. 发明授权
    • Methods and apparatuses for selectively limiting undesired radiation
    • 用于选择性地限制不需要的辐射的方法和装置
    • US07095026B2
    • 2006-08-22
    • US10703136
    • 2003-11-06
    • John W. DevittMark E. GreinerJeffrey J. VoelkerDavid R. Wade
    • John W. DevittMark E. GreinerJeffrey J. VoelkerDavid R. Wade
    • G01J5/00
    • G01J5/06G01J1/04G01J1/0407G01J1/0414G01J1/0418G01J1/0488G01J1/42G01J2001/0276G02F1/0126G02F2203/11G02F2203/52
    • An apparatus for selectively limiting undesired radiation from a scene which, in one embodiment, includes an optic that is operative to attenuate radiation by selectively losing transparency in response to radiation within a first wavelength band from a source. The loss of transparency affects the passage through the optic of radiation within a second wavelength band from that source. The optic can be positioned between a sensor and the scene such that the sensor is configured to receive radiation from the scene through the optic. In one embodiment, an optical limiter includes a plurality of such optics, wherein the optical limiter is configured to facilitate transmission of light corresponding to a scene, and wherein each optic is configured to receive a respective portion of the light corresponding to a respective portion of the scene. A light detector assembly and a method of limiting light energy are also included.
    • 一种用于选择性地限制来自场景的不需要的辐射的装置,在一个实施例中,该光学器件包括可操作地通过响应于来自源的第一波长带内的辐射选择性地损失透明度来衰减辐射的光学器件。 透明度的损失影响到来自该源的第二波长带内的辐射光通过。 光学元件可以位于传感器和场景之间,使得传感器被配置成通过光学器件从场景接收辐射。 在一个实施例中,光学限制器包括多个这样的光学器件,其中所述光学限制器被配置为促进对应于场景的光的透射,并且其中每个光学器件被配置为接收对应于相应部分的光的相应部分 现场。 还包括光检测器组件和限制光能的方法。
    • 3. 发明授权
    • Current measuring circuit with means for nullifying the effects of
current source and lead resistance
    • 电流测量电路,具有无效电流源和引线电阻效应的方法
    • US5008523A
    • 1991-04-16
    • US412715
    • 1989-09-26
    • Rex M. DavisMark E. Greiner
    • Rex M. DavisMark E. Greiner
    • G01R19/00
    • G01R19/0023
    • Current derived from an indium arsenide current generating photodetector is determined accurately, despite the presence of a variable resistance between terminals of the photodetector and the photodetector having leads with appreciable resistance connected to the detector terminals. Two leads are connected to each detector terminal. The two leads connected to one of the detector terminals are respectively connected to an inverting input terminal of an operational amplifier and to one terminal of a feedback resistor of the amplifier; the other terminal of the feedback resistor is connected to the amplifier output terminal. The two leads connected to the other terminal of the photodetector are respectively connected to the operational amplifier non-inverting input terminal and to ground. The operational amplifier derives an output voltage that accurately represents the output current of the photodetector, independently of the photodetector resistance and the lead wire resistance.
    • 尽管在光电检测器的端子和具有连接到检测器端子的明显电阻的引线的光电检测器之间存在可变电阻,但是准确地确定了来自砷化铟电流产生光电检测器的电流。 两个引线连接到每个检测器端子。 连接到检测器端子之一的两个引线分别连接到运算放大器的反相输入端子和放大器的反馈电阻器的一个端子; 反馈电阻的另一个端子连接到放大器输出端子。 连接到光电检测器的另一端的两个引线分别连接到运算放大器的非反相输入端并接地。 运算放大器独立于光检测器电阻和引线电阻,得出精确表示光电检测器的输出电流的输出电压。