FOURIER-TRANSFORM SPECTROSCOPIC IMAGING USING AN INFRARED FOCAL-PLANE ARRAY DETECTOR
FOURIER-TRANSFORM SPECTROSCOPIC IMAGING USING AN INFRARED FOCAL-PLANE ARRAY DETECTOR
复制标题
DOI：
10.1021/ac00115a003
复制
发表时间：
1995-10-01
影响因子：
7.4
通讯作者：
LEVIN, IW
中科院分区：
文献类型：
--
作者：
LEWIS, EN;TREADO, PJ;LEVIN, IW
介绍了一种将步进扫描傅里叶变换迈克尔逊干涉术与锑化铟焦平面阵列（FPA）图像检测相结合的中红外光谱化学成像新技术。红外焦平面阵列检测器与干涉仪的耦合提供了仪器复用/多通道的优点。具体地，多个检测器元件使得能够同时收集所有像素处的光谱，而系统的干涉仪部分允许同时测量所有光谱频率。使用这种中红外光谱成像方法，生成的光谱图像的保真度仅受FPA探测器上的像素数量的限制，并且光谱图像采集仅需要几秒钟的凝视时间。这种新颖的高清晰度技术代表了红外化学成像分析的未来，这是化学和材料科学中的一门新学科，它将光谱学的分子分析能力与可视化能力相结合。特别是，化学成像广泛适用于非侵入性，非均质材料的分子表征，因为所有的固态材料表现出化学不均匀性，存在的设计或开发过程中的材料制备或制造。成像，采用拉曼和红外光谱，允许精确表征的化学组成，域结构，和化学结构的各种物质。这些信息通常对从制造新材料到基本了解生物样品的广泛活动至关重要。在这项研究中，步进扫描成像原理，仪器设计的细节，和红外化学成像结果。自前景执行高分辨率和高清晰度的中红外化学成像非常迅速地实现了与步进扫描方法，材料的化学分析的影响是多种多样的。
A powerful new mid-infrared spectroscopic chemical imaging technique combining step-scan Fourier transform Michelson interferometry with indium antimonide focal-plane array (FPA) image detection is described. The coupling of an infrared focal-plane array detector to an interferometer provides an instrumental multiplex/multichannel advantage. Specifically, the multiple detector elements enable spectra at all pixels to be collected simultaneously, while the interferometer portion of the system allows all the spectral frequencies to be measured concurrently. With this method of mid-infrared spectroscopic imaging, the fidelity of the generated spectral images is limited only by the number of pixels on the FPA detector, and only several seconds of staring time is required for spectral image acquisition. This novel, high-definition technique represents the future of infrared chemical imaging analysis, a new discipline within the chemical and material sciences, which combines the capability of spectroscopy for molecular analysis with the power of visualization. In particular, chemical imaging is broadly applicable for noninvasive, molecular characterization of heterogeneous materials, since all solid-state materials exhibit chemical nonuniformity that exists either by design or by development during the course of material preparation or fabrication. Imaging, employing Raman and infrared spectroscopy, allows the precise characterization of the chemical composition, domain structure, and chemical architecture of a variety of substances. This information is often crucial to a wide range of activities, extending from the fabrication of new materials to a basic understanding of biological samples. In this study, step-scan imaging principles, instrument design details, and infrared chemical imaging results are presented. Since the prospect of performing high-resolution and high-definition mid-infrared chemical imaging very rapidly has been achieved with the step-scan approach, the implications for the chemical analysis of materials are many and varied.