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前言用仪器作辅助观察现在已越来越普遍了,即便它给眼睛所提供的是单眼的和单色的信息(例如用一条电视信道),仍能充分认识到所显示出的事物如同实际的一样。但是,如果用红外成象系统,将8-13微米波段中的辐射图案转换为可见图象,就不会出现实际事物,而是事物的幻象。了解红外成象的局限性以及红外成象与普通的观察有什么区别,对正确解释红外成象是极为重要的。发射和反射大家知道,在红外彼长中,表面发射比阳光的反射的辐射,更为显著,从图1中多少可以看出一些。这里示出了温度为300°K和6000°K两种黑体的辐射分布情况。这两条实线说明
Preface Instrument-assisted observation is now becoming more prevalent, and even though it gives monocular and monochromatic information (such as a television channel) to the eye, it still fully recognizes that what is displayed is as real same. However, if an infrared imaging system is used to convert the radiation pattern in the 8-13 micron band into a visible image, no real thing will occur, but an illusion of things. Understanding the limitations of infrared imaging and the difference between infrared imaging and ordinary observation is extremely important for proper interpretation of infrared imaging. Emission and reflection We all know that in the infrared, the surface emits more radiation than the reflected sunlight, as can be seen in Figure 1. The radiation distributions for the two black bodies at 300 ° K and 6000 ° K are shown here. These two solid lines illustrate