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MEMS Programmable Spectral Imaging System for Remote Sensing

机译：MEMS可编程光谱成像系统，用于遥感

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ITT Industries Space Systems Division and Eastman Kodak Company have developed a scalable, data- and power-efficient imaging spectrometer system with a digitally tunable optical filter capability, which enables the rapid selection of high-quality user-defined optical spectral band(s) of interest. The system utilizes a custom-designed, high-contrast diffractive MEMS device with 50 independent spectral switches at the image plane of a double-pass dispersive/de-dispersive spectrometer. The custom MEMS device is based on grating electromechanical system (GEMS) display technology, which provides very high image contrast (2000:1), fast optical switching speeds (< 100 ns), and a large active area with a very high fill factor. The system enables the selection of arbitrary, narrow or wide spectral bands of interest across the visible spectrum with a sampling resolution of 5 nm, without any moving mechanical parts. The resulting optical filter quality and performance is comparable to conventional fixed-band dichroic filters used in current remote sensing systems. The brassboard systems are designed for rapid transition to space-based, electro-optical (EO) remote sensing missions that utilize large format linear TDI scanning sensors and large format area staring arrays in the visible band. This technology addresses numerous capabilities to meet future EO system requirements for rapidly selecting and utilizing a high quality imaging optical bandpass of interest. The system concept provides capability for a > 20X scan rate advantage over conventional hyperspectral imagers as a result of the compatibility with TDI scanning. The image quality is comparable to current MSI and HSI systems.
机译：ITT工业空间系统部门和Eastman Kodak公司已经开发了具有数字可调光学滤波器功能的可扩展的，数据和功率高效的成像光谱仪系统，可以快速选择高质量的用户定义的光谱带。利益。该系统利用定制设计的高对比度衍射MEMS器件，在双通色散/解散光谱仪的像面上具有50个独立的光谱开关。定制的MEMS器件基于光栅机电系统（GEMS）显示技术，可提供非常高的图像对比度（2000：1），快速的光开关速度（<100 ns）和较大的有源区域以及很高的填充系数。该系统能够以5 nm的采样分辨率在可见光谱范围内选择感兴趣的任意窄带或宽谱带，而无需任何移动的机械部件。所得到的光学滤波器的质量和性能可与当前遥感系统中使用的常规固定波段二向色滤波器相媲美。黄铜板系统设计用于快速过渡到天基电光（EO）遥感任务，该任务利用大幅面线性TDI扫描传感器和可见波段中的大幅面区域凝视阵列。该技术具有多种功能，可满足未来EO系统要求，以快速选择和利用感兴趣的高质量成像光学带通。由于与TDI扫描的兼容性，该系统概念提供了比传统高光谱成像仪高20倍的扫描速率优势的能力。图像质量可与当前的MSI和HSI系统相比。

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