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公开(公告)号：US5717208A
公开(公告)日：1998-02-10
申请号：US655425
申请日：1996-05-30
IPC分类号： G02B26/10 , H01L27/146 , H04N5/33 , H04N5/349 , H04N5/365 , H04N5/369 , G01J5/24 , H01L31/09
CPC分类号： H04N5/3656 , G02B26/101 , H01L27/1465 , H04N5/33 , H04N5/349
摘要： An improved imaging technique is disclosed wherein an output from an IR-FPA (16) corresponds to image motion, wherein a scene image stays correlated with the IR-FPA readout, and wherein non-uniformities (e.g., fixed pattern spatial noise) are uncorrelated from frame to frame. The uncorrelated fixed pattern spatial noise is identified and removed by a signal processor, such as a SB-NUC block (24). The scene image is scanned over the IR-FPA by a dither mirror (14) in synchronism with the movement of a frame of pixels (17) on the IR-FPA. Electronics (16a, 16b, 30, 32, 34) are included on the IR-FPA for controlling the scanning and read out of pixels within a currently selected frame.
摘要翻译： 公开了一种改进的成像技术，其中来自IR-FPA（16）的输出对应于图像运动，其中场景图像与IR-FPA读出保持相关，并且其中非均匀性（例如，固定模式空间噪声）不相关 从帧到帧。 通过诸如SB-NUC块（24）的信号处理器识别和去除不相关的固定图案空间噪声。 与IR-FPA上的像素（17）的移动同步，通过抖动反射镜（14）在IR-FPA上扫描场景图像。 IR-FPA中包括电子装置（16a，16b，30,32,34），用于控制当前选择的帧内的像素的扫描和读出。
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公开(公告)号：US5925883A
公开(公告)日：1999-07-20
申请号：US900408
申请日：1997-07-25
CPC分类号： H04N5/37206 , H04N3/1525 , H04N5/33
摘要： An IR focal plane array (IR-FPA) includes an IR radiation detector (11a) having a plurality of IR radiation responsive photodetectors (PDs) and a readout integrated circuit (11) that includes a plurality of unit cells arranged in an N.times.M matrix. Each unit cell has an input coupled to an output of one of the IR radiation responsive photodetectors. The IR-FPA further includes M column amplifiers, preferably CTIAs, individual ones of which have an input that is coupled through one of N switches (.phi.tr) to individual ones of the N unit cells. A charge integrating capacitance in each unit cell is formed by a charge well underlying one (.phi..sub.1) of a plurality of transfer gates coupled between individual ones of the N unit cells that are coupled to one of the M column amplifiers. The plurality of transfer gates are a multiphase CCD, preferably a four phase CCD, and are clocked at a rate that is a function of a rate of scene image motion relative to a radiation receiving surface (10a) of the IR-FPA for transferring photodetector-generated charge packets from one row to a next, adjacent row during an integration period. In a further embodiment the M columns are partitioned into j column groups, wherein all transfer gates within one of the j column groups are clocked at a rate that is a function of a rate of scene image motion relative to the column group.
摘要翻译： IR焦平面阵列（IR-FPA）包括具有多个IR辐射响应光电检测器（PD）的IR辐射检测器（11a）和包括以N×M矩阵排列的多个单位单元的读出集成电路（11）。 每个单位单元具有耦合到IR辐射响应光电探测器之一的输出的输入。 IR-FPA还包括M列放大器，优选CTIA，其中各个具有通过N个开关（phi）中的一个耦合到N个单元中的单个单元的输入。 在每个单位单元中的电荷积分电容由耦合到耦合到M列放大器之一的N个单位单元中的各个单元之间的多个传输门的一个（phi 1）下方的电荷形成。 多个传送门是多相CCD，优选为四相CCD，并且以相对于用于传送光电检测器的IR-FPA的辐射接收表面（10a）的场景图像运动的速率的函数的速率被计时 在积分期间，从一行到下一个相邻行的生成电荷数据包。 在另一个实施例中，M列被划分为j列组，其中j列组之一内的所有传输门以相对于列组的场景图像运动速率的函数的速率被计时。
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3.发明授权Apparatus and method for performing optical signal intensity correction in electro-optical sensor arrays 有权在电光传感器阵列中执行光信号强度校正的装置和方法公开(公告)号：US06288387B1
公开(公告)日：2001-09-11
申请号：US09296044
申请日：1999-04-21
IPC分类号： G02B2100
摘要： A method and related system provides an array of sensing elements located in rows and columns, and each column of sensing elements has a connected circuit chain which processes the signals from the sensing elements in that column. Each circuit chain produces a signal with a corrective gain value calculated for it relative to the datum of the array which is selected for the point where signal strength would be strongest. The method and device is capable of being used in a starring or scanning type array mode.
摘要翻译： 方法和相关系统提供位于行和列中的感测元件的阵列，并且每列感测元件具有连接的电路链，其处理来自该列中的感测元件的信号。 每个电路链产生一个信号，该信号具有相对于信号强度最强的点选择的阵列的数据为其计算的校正增益值。 该方法和装置能够以主演或扫描型阵列模式使用。
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4.发明授权Staring IR-FPA with on-FPA adaptive dynamic range control electronics 失效盯着具有FPA自适应动态范围控制电子装置的IR-FPA
公开(公告)号：US5563405A
公开(公告)日：1996-10-08
申请号：US430780
申请日：1995-04-28
CPC分类号： H04N5/3651 , H04N5/33
摘要： An adaptive dynamic range control circuit architecture is disclosed that enables an IR-FPA (10) to achieve a higher dynamic range. The circuit architecture significantly reduces a resolution required for an analog-to-digital converter (ADC 24) that converts the analog output signals of the IR-FPA to a digital representation. In a preferred embodiment of this invention a column CTIA readout integrated circuit architecture is used in conjunction with the adaptive feedback circuitry of this invention to provide pedestal suppression on a per-pixel basis for the IR-FPA. The use of the circuitry of this invention modifies the conventional column CTIA amplifier configuration to a configuration having an auto-zeroed charge ratioed gain stage (50). One advantage to this technique is that by suppressing the charge pedestal, the usable signal output from the IR-FPA can be brought off-chip to the readout integrated circuit at a much higher gain. As a result, the ADC requires fewer bits to resolve the useable signal information and dynamic range.
摘要翻译： 公开了一种使得IR-FPA（10）能够实现更高动态范围的自适应动态范围控制电路架构。 电路架构显着降低了将IR-FPA的模拟输出信号转换为数字表示的模数转换器（ADC 24）所需的分辨率。 在本发明的优选实施例中，列CTIA读出集成电路架构与本发明的自适应反馈电路结合使用，以便为IR-FPA在每像素的基础上提供基座抑制。 使用本发明的电路将常规的CTIA放大器配置修改为具有自动归零的充电比增益级（50）的配置。 该技术的一个优点是，通过抑制电荷基座，可以以更高的增益将从IR-FPA输出的可用信号从芯片上提取到读出集成电路。 因此，ADC需要较少的位来解析可用的信号信息和动态范围。
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