公开(公告)号：US5454048A

公开(公告)日：1995-09-26

申请号：US973099

申请日：1992-11-06

Applicant: David S. Davis

Inventor： David S. Davis

IPC: G01J3/28 ,  G06K9/58 ,  G06K9/00 ,  G06F7/36

CPC classification number: G01J3/2846 ,  G01J3/2823 ,  G06K9/58

Abstract: A new type of fully-multiplexed imaging device is described for use at wavelengths where efficient focal plane array detectors are unavailable. It shares some properties in common with the familiar technique of cycle-redundancy (i.e. Hadamard transform) imaging, but many of its features and capabilities are unique. Some of these characteristics are, first, the new approach employs image encoding masks that are both transmitting and reflecting, thereby increasing optical efficiency, and second, the technique requires only 2.sqroot.N encoding masks to image a field of N pixels, a dramatically smaller number than that needed (.about.2N) by traditional methods. Dual complementary inputs are used for first-order passive rejection of radiation background interference. The resulting image spatial resolutions along two coordinate directions are completely independent of each other. The measured image is formed by a convergent tiling of the image plane, quite unlike conventional raster scanning. In principle, the technique is capable of versatile adaptation to a wide variety of imaging and target discrimination tasks in infrared and microwave remote sensing, astronomy and surveillance.

Abstract translation: 描述了一种新型的全复用成像装置，用于有效的焦平面阵列检测器不可用的波长。 它与熟悉的循环冗余技术（即Hadamard变换）成像共享一些属性，但其许多特征和功能是独一无二的。 其中一些特点是，首先，新方法采用了传输和反射的图像编码掩模，从而提高了光学效率，其次，该技术只需要2个2ROOT N编码掩码来对N个像素的场进行成像， 数量比传统方法要差（DIFFERENCE 2N）。 双互补输入用于辐射背景干扰的一阶无源抑制。 所得到的沿两个坐标方向的图像空间分辨率彼此完全独立。 测量的图像由图像平面的收敛平铺形成，与传统的光栅扫描非常不同。 原则上，该技术能够对红外和微波遥感，天文学和监视中的各种成像和目标识别任务进行多种适应。