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众所周知红外线的热效应,而红外线按波长通常划分为三个部分——近红外线(波长为0.78—1.4μm)、中红外线(波长为1.4—3μm)、远红外线(波长为3—25μm及以上区域)。绝大多数的高分子物质、有机物等材料都对3～25微米区域的远红外线有很强的吸收,通常所说的远红外线技术应用就是指这个区域的红外线,而红外线一般具有如下特点: 1.对非透明材料的透射率可以看作是零。 2.红外辐射光谱只有与物质分子振动光谱的吸收波长相等时,物质才容易吸收热辐射能。
The thermal effect of infrared rays is well known, and infrared rays are usually divided into three parts by wavelength: near-infrared rays (wavelength 0.78-1.4μm), mid-infrared rays (wavelength 1.4-3μm), far-infrared rays (wavelengths 3-25μm and above) . The vast majority of high-molecular materials, organic materials, and other materials have strong absorption of far-infrared rays in the 3 to 25 micron region. Generally, the far-infrared technology application refers to infrared radiation in this region, and infrared rays generally have the following characteristics: 1 Transmissivity to non-transparent materials can be considered as zero. 2. Infrared radiation spectrum The material absorbs heat radiation energy only when it is equal to the absorption wavelength of the vibration spectrum of the material molecule.