Swift R D, Wattson R B, Decker J A, Paganetti R, Harwit M
Appl Opt. 1976 Jun 1;15(6):1595-609. doi: 10.1364/AO.15.001595.
An imager and a spectrometric imager, which achieve multiplexing by the use of binary optical encoding masks, have been built and tested. The masks are based on orthogonal, pseudorandom digital codes derived from Hadamard matrices. The spatial (and/or spectral) data are therefore obtained in the form of a Hadamard transform of the spatial (and/or spectral) scene; computer algorithms are used to decode the data and reconstruct images of the original scene. The hardware, algorithms processing and display facility are described. A number of spatial and spatial/spectral images, obtained in the laboratory, are presented. We present an analysis of the situations for which the multiplex advantage may be gained and of the limitations of the technique. Potential applications of the spectrometric imager are discussed. The spectrometric imager is covered by U.S. Patent 3,720,469 assigned to Spectral Imaging Inc., Concord, Mass.
已经构建并测试了一种成像仪和一种光谱成像仪，它们通过使用二元光学编码掩模来实现多路复用。这些掩模基于从哈达玛矩阵导出的正交伪随机数字编码。因此，空间（和/或光谱）数据是以空间（和/或光谱）场景的哈达玛变换形式获得的；使用计算机算法对数据进行解码并重建原始场景的图像。描述了硬件、算法处理和显示设备。展示了在实验室中获得的一些空间和空间/光谱图像。我们对可以获得多路复用优势的情况以及该技术的局限性进行了分析。讨论了光谱成像仪的潜在应用。光谱成像仪由美国专利3,720,469涵盖，该专利归马萨诸塞州康科德的光谱成像公司所有。
