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1.发明授权Wide dynamic range non-uniformity compensation for infrared focal plane arrays 失效用于红外焦平面阵列的宽动态范围非均匀性补偿
公开(公告)号：US5420421A
公开(公告)日：1995-05-30
申请号：US322116
申请日：1994-10-12
摘要： A method and apparatus for non-uniformity compensation for infrared focal plane arrays in an infrared imaging device (10) including a calibration operation and a correction operation. The calibration operation measures the response (24) generated by the detector elements (14) in the focal plane array (16) to a wide range of known signal flux levels of infrared radiation (22) produced by a uniform black body under controlled conditions. The responses (24) are then stored as a digital video signal (27) in a look-up table memory (38). The correction operation achieves the near real-time compensation of a second response of the detector element (14) to the signal flux level of infrared radiation (22) produced by objects in the field of view surveyed by the imaging device (10) by comparing the second response to the stored digital video signals (27) and interpolates the second response to a corrected digital video output signal (31).
摘要翻译： 一种用于红外成像装置（10）中的红外焦平面阵列的不均匀补偿的方法和装置，包括校准操作和校正操作。 校准操作将由焦平面阵列（16）中的检测器元件（14）产生的响应（24）测量到在受控条件下由均匀黑体产生的红外辐射（22）的已知信号通量水平的宽范围。 响应（24）然后作为数字视频信号（27）存储在查找表存储器（38）中。 校正操作实现对由成像装置（10）测量的视野中的物体产生的红外辐射（22）的信号通量水平的检测器元件（14）的第二响应的近似实时补偿，通过比较 对所存储的数字视频信号（27）的第二响应，并将第二响应内插到校正的数字视频输出信号（31）。
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2.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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