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高中物理教材“薄膜干涉”一节中 ,有一个重要的实际应用例子 :在透镜和棱镜的表面涂上一层薄膜 ,当薄膜的厚度为某种色光 (一般取绿光 )的四分之一波长时 ,在薄膜的两个表面上反射的光 ,光程差恰好等于半个波长 ,因而相互抵消 ,这就大大减少了光的反射损失 ,增强了透射光的强?
There is an important practical application in the “Thin Film Interference” section of the high school physics textbook: Apply a thin layer of film to the surface of lenses and prisms. When the thickness of the film is a quarter of a certain shade of light (typically green) At wavelengths, the light reflected on the two surfaces of the film, the optical path difference is exactly equal to one-half wavelength, and thus cancel each other. This greatly reduces the reflection loss of light and enhances the intensity of transmitted light.