薄膜干涉分为两种一种叫等倾干涉，另一种称做等厚干涉。等厚干涉是由平行光入射到厚度变化均匀、折射率均匀的薄膜上、下表面而形成的干涉条纹．薄膜厚度相同的地方形成同条干涉条纹，故称等厚干涉．（牛顿环和楔形平板干涉都属等厚干涉．）
等厚度干涉 interference of equal thickness
Measurement accuracy could be improved in the way of making full use of 0-class orientating of complex light's equal thickness interference.
采用白光等厚干涉的方法，可以充分利用白光等厚干涉零级条纹的高精度定位作用，提高测量精度。
参考来源 - 基于白光等厚干涉原理的光学球面曲率半径自动测量系统研究·2,447,543篇论文数据，部分数据来源于NoteExpress
指出劈尖等厚干涉实验中随着膜厚的增加，条纹间距变大。
In the experiment of wedge shaped interference, the fringe space becomes wider as the thickness of the membrane increases.
用激光照射牛顿半环来演示薄膜台阶的等厚干涉现象和测定薄膜厚度。
Newton's half ring is rayed by laser to demonstrate the equivalent thickness interference phenomenon of film step and measure film thickness.
阐述了利用等厚干涉，通过线阵CCD图像处理系统自动测量圆度误差的测量原理。
The principle of the measuring roundness error system used the equal thickness interference and CCD image-processing system is expatiated.
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