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    • 1. 发明授权
    • Automatic responsivity control for a CCD imager
    • CCD成像仪的自动响应控制
    • US4345148A
    • 1982-08-17
    • US194204
    • 1980-10-06
    • Michael Y. PinesColin G. WhitneyJames S. Duncan
    • Michael Y. PinesColin G. WhitneyJames S. Duncan
    • H04N5/30H04N5/217H01J40/14
    • H04N5/2176
    • An automatic responsivity control (ARC) circuit compensates for the nonuniform deviation .DELTA.R in the average responsivity R of a column of photodetectors from a nominal responsivity R.sub.0 which is uniform from column to column. The ARC circuit first establishes a reference level by subtracting two known calibration signals occurring during optical retracing and then multiplies the reference level by each image signal occurring during optical scanning. The resulting product contains undesirable signal components or terms which are algebraic functions of .DELTA.R.sup.2 and other terms which are algebraic functions of .DELTA.R. The terms in .DELTA.R.sup.2 are ignored because .DELTA.R is significantly less than R.sub.0. The terms in .DELTA.R are eliminated by establishing a second reference level, which itself includes terms in .DELTA.R, and then subtracting the foregoing product from the second reference level. If the bias voltages applied to the ARC circuit are adjusted according to a formula discussed in the detailed description, this second subtraction results in a cancellation of all terms in .DELTA.R. The resulting output signal therefore contains only terms in .DELTA.R.sup.2 which are negligible, and thus the output signal is substantially free of distortion due to responsivity deviations.
    • 自动响应控制(ARC)电路补偿从列到列的均匀的标称响应度R0的光电检测器列的平均响应度R中的不均匀偏差DELTA R。 ARC电路首先通过减去在光学回溯期间发生的两个已知校准信号来建立参考电平,然后将参考电平乘以在光学扫描期间发生的每个图像信号。 所得到的产品包含不期望的信号分量或代表DELTA R2的代数函数的术语,以及其他术语,它们是DELTA R的代数函数。DELTA R2中的项被忽略,因为DELTA R显着小于R0。 通过建立第二参考水平来消除DELTA R中的项,其本身包括DELTA R中的项,然后从第二参考水平减去前述乘积。 如果根据详细描述中讨论的公式调整施加到ARC电路的偏置电压,则该第二次减法导致DELTA R中所有项的取消。因此,所得到的输出信号仅包含DELTA R2中可忽略的项, 因此输出信号由于响应性偏差基本上没有变形。
    • 2. 发明授权
    • DC Restore circuit for charge coupled devices
    • 直流恢复电路用于电荷耦合器件
    • US4331874A
    • 1982-05-25
    • US165179
    • 1980-07-02
    • James S. DuncanMichael Y. Pines
    • James S. DuncanMichael Y. Pines
    • H01L27/148H04N5/217H04N5/33H04N5/372G01J1/00
    • H04N5/33H01L27/14856H01L27/14875H04N5/2176
    • As CCD circuit for restoring to a common DC level, data received from a plurality of detector channels of a scanned array so as to overcome the effect of variations in detector parameters and other non-uniformities in the circuit. The DC correction value is established during retrace time by storing a representative time integrated data charge packet when energy from a cold reference surface is being applied to the detectors. During the scan time of the field of view by the detectors the representative charge packet is utilized to provide a DC restoration or correction charge to each data charge packet received from the detectors. The system thus standardizes to a common DC level, the output data from a plurality of channels.
    • 作为用于恢复到公共DC电平的CCD电路,从扫描阵列的多个检测器通道接收的数据,以克服检测器参数的变化和电路中的其它不均匀性的影响。 通过在来自冷基准表面的能量被施加到检测器时,通过存储代表性的时间积分数据电荷包来在回扫时间期间建立DC校正值。 在检测器的视野的扫描时间期间,使用代表性的电荷包来向从检测器接收的每个数据电荷包提供DC恢复或校正电荷。 因此,该系统将标准化为公共DC电平,来自多个通道的输出数据。