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《红外辐射》.ppt

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《红外辐射》.ppt

上传人:相惜 2022/7/5 文件大小:1.64 MB

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《红外辐射》.ppt

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文档介绍:红外技术
红外技术是光电子学的重要组成部分,属于光学的应用分支。
红外技术课是一门培养学生掌握红外基本理论和相关的红外探测技术的应用基础课。
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本课程内容
本课程分九章:
一、红外辐射
红外辐射的基本概念,辐射物理prism to create a spectrum - the "rainbow" created when light is divided into its colors - and measured the temperature of each color. He used three thermometers with blackened bulbs (to better absorb the heat) and placed one bulb in each color while the other two were placed beyond the spectrum as control samples. As he measured the temperatures of the violet, blue, green, yellow, orange and red light, he noticed that all of the colors had temperatures higher than the controls and that the temperature of the colors increased from the violet to the red part of the spectrum. After noticing this pattern, Herschel decided to measure the temperature just beyond the red portion of the spectrum in a region apparently devoid of sunlight. To his surprise, he found that this region had the highest temperature of all.
Herschel performed further experiments on what he called the "calorific rays" that existed beyond the red part of the spectrum and found that they were reflected, refracted, absorbed and transmitted just like visible light. What Sir William had discovered was a form of light (or radiation) beyond red light. These "calorific rays" were later renamed infrared rays or infrared radiation (the prefix infra means `below'). Herschel's experiment was important not only because it led to the discovery of infrared, but also because it was the first time that someone showed that there were forms of light that we cannot see with our eyes. Herschel's original prism and mirror are on display at the National Museum of Science and Industry in London, England.
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1835年,安培宣告了光和热射线的同一性。
1870年,兰利制成了面积只有针孔那样大小的探测器,并用凹面反射光栅、岩盐及***化物棱镜来提高测量色散的能力,这为红外应用的重要方面——航空摄影奠定了基础。
1880年,“红外”一词出现在阿贝尼的文 章中(最早)。
1888年,麦洛尼用比较灵敏的热电堆改进了赫胥耳的探测和测量方法,为红外技术奠定了基础。
1904年,开始采用近红外进行摄影。
1929年,苛勒发明了银氧铯(Ag-o-Cs)光阴极,开创了红外成像器件的先河。
二十世纪30年代中期,荷兰、德国、美国各自独立研制成红外变像管,红外夜视系统应用于实战。
1952年,美国陆军制成第一台热