以前作为检测红外线的元件,一般是用热电效应方法,热电动势法和电阻变化等方法。另外也有利用量子效应的光电动势的测量或通过电阻变化测量红外线强度的方法。前者的热型元件,有效波长范围可在整个红外区域使用,但是灵敏度较低,表示灵敏度的D的值约为10~8。至于量子型元件,由于所用材料的关系,有效波长范围受到限制,但是它的灵敏度比热型元件约高2个数量级。此外量子型元件的价格高,测定时必须对元件进行冷却,较为不便。 Previously used as the detection of infrared components, the general method is to use the thermoelectric effect, thermoelectromotive force and resistance changes and other methods. There is also a method of measuring the photo-electromotive force using the quantum effect or measuring the intensity of infrared light through a change in resistance. The former thermal element, the effective wavelength range can be used in the entire infrared region, but the sensitivity is low, the sensitivity of the value of D is about 10 ~ 8. As for quantum devices, the effective wavelength range is limited due to the material used, but its sensitivity is about two orders of magnitude higher than that of thermal devices. In addition, the high cost of quantum devices, the determination of the components must be cooled, more inconvenient.