目前还未有一种理想的透红外光学材料,因此,使选择材料满足红外元件的设计工作比较复杂,例如氯化钠有许多符合理想的性能,包括价廉、吸收系数低、抛光能力良好、透过范围大等,能透过大于17微米的波长,而岩盐有严重的不足之处,如水分大,湿度高,温度过高,使它没有什么用场,因此,使用者应依材料的范围选择适于标准元件的材料,但是大 Currently, there is no ideal infrared optical material, therefore, the choice of materials to meet the design of infrared components more complicated, for example, sodium chloride has many desirable properties, including low cost, low absorption coefficient, good polishing ability, through Large range of over, through the wavelength of more than 17 microns, and rock salt serious deficiencies, such as moisture, high humidity, the temperature is too high, it is useless, so the user should choose according to the scope of the material Suitable for standard components of the material, but large