本文提出了推导非四分之一波长膜系反射镜吸收率的另一种方法。
In this paper another method is employed to derive the expression for the absorptance of non quarter wave systems.
游标测距技术是一种新颖的相位测距方法，该技术可以提供精密的径向距离测量值，其随机误差小于四分之一波长。
Range Vernier technique is a novel phase ranging technique, which can provide radial measurement with noise values at sub-qtr-wavelength level.
本文针对抑制液体火箭发动机不稳定燃烧的声学装置——赫姆·霍兹声腔和四分之一波长管声腔进行了研究。
Helmholtz resonators and quarter wave resonators are studied as the high frequency combustion instabilities suppression devices in liquid rocket engines.
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