论文部分内容阅读
使用致冷红外探测器的热象仪,在军事、医学和工业方面很引人注意。这种仪器用机械转镜扫描,使探测器线列扫过图象。可以使用两种扫描方式:并联扫描——每一个探测器在景物中同时扫一条线;串联扫描——各个探测器依次扫过景物的一个单元。电荷耦合器件在并联扫描中,可供阵列作多路传输用;在串联扫描中,则可进行时间延迟和积分。供可见光用的两维自扫描电荷耦合器件阵列的最近发展,引起人们对起同样作用的红外电荷耦合器件的兴趣。这样就可制出无转动部件的小型轻便价廉的系统。下面讨论红外电荷耦合器件的可能制造途径。
Thermal imaging cameras using cryogenic infrared detectors are attractive in military, medical and industrial settings. This instrument is scanned with a mechanical mirror to sweep the detector line through the image. Two scanning methods are available: Parallel scanning - Each detector sweeps a line simultaneously in the scene; Tandem scanning - Each detector sweeps one unit of the scene in turn. Charge-coupled devices can be used for multiplexing the array in parallel scans; in series scans, the time delay and integration can be done. The recent development of two-dimensional self-scanning charge-coupled device arrays for visible light has raised interest in infrared charge-coupled devices that play the same role. This makes it possible to produce small, light and inexpensive systems without rotating parts. The possible ways of making an IR charge-coupled device are discussed below.