公开(公告)号：US06831688B2

公开(公告)日：2004-12-14

申请号：US10118534

申请日：2002-04-08

申请人： Andre G. Lareau ,  Bradford Speer ,  William R. Pfister ,  Stephen R. Beran ,  Barry Swartz ,  James P. Karins ,  Robert J. Lintell ,  Christopher P. Warren

发明人： Andre G. Lareau ,  Bradford Speer ,  William R. Pfister ,  Stephen R. Beran ,  Barry Swartz ,  James P. Karins ,  Robert J. Lintell ,  Christopher P. Warren

IPC分类号： H04N5335

CPC分类号： H04N5/37206 ,  G01J3/02 ,  G01J3/0256 ,  G01J3/2803 ,  G01J3/2823 ,  G01J3/51 ,  H04N5/353 ,  H04N5/3743

摘要： A two-dimensional focal plane array (FPA) is divided into sub-arrays of rows and columns of pixels, each sub-array being responsive to light energy from a target object which has been separated by a spectral filter or other spectrum dividing element into a predetermined number of spectral bands. There is preferably one sub-array on the FPA for each predetermined spectral band. Each sub-array has its own read out channel to allow parallel and simultaneous readout of all sub-arrays of the array. The scene is scanned onto the array for simultaneous imaging of the terrain in many spectral bands. Time Delay and Integrate (TDI) techniques are used as a clocking mechanism within the sub-arrays to increase the signal to noise ratio (SNR) of the detected image. Additionally, the TDI length (i.e., number of rows of integration during the exposure) within each sub-array is adjustable to optimize and normalize the response of the photosensitive substrate to each spectral band. The array provides for parallel and simultaneous readout of each sub-array to increase the collection rate of the spectral imagery. All of these features serve to provide a substantial improvement in the area coverage of a hyperspectral imaging system while at the same time increasing the SNR of the detected spectral image.

摘要翻译： 二维焦平面阵列（FPA）被划分为行和列的像素的子阵列，每个子阵列响应于已经被光谱滤波器或其他频谱分割元件分离的目标对象的光能 预定数量的光谱带。 对于每个预定的光谱带，FPA上最好有一个子阵列。 每个子阵列都有自己的读出通道，以允许并行和同时读出阵列的所有子阵列。 将场景扫描到阵列上，以便在许多光谱带中同时成像地形。 时间延迟和积分（TDI）技术被用作子阵列内的时钟机制，以增加检测到的图像的信噪比（SNR）。 此外，每个子阵列内的TDI长度（即，曝光期间的积分行数）是可调整的，以使感光基片对每个光谱带的响应进行优化和归一化。 该阵列提供并行和同时读取每个子阵列以增加光谱图像的采集速率。 所有这些特征用于提供高光谱成像系统的面积覆盖的显着改进，同时增加检测到的光谱图像的SNR。