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.
第一个四分之一波长部分在一个方向上从信号源或馈送点延伸，而第二个四分之一波长在相反的方向上从信号源延伸。
A first quarter wavelength portion extending in one direction from the signal source or feed point and a second quarter wavelength extending in the opposite direction from the signal source.
此方法对光源的单色性要求低，新需器材及实验方法简便，并且适于各种波长的四分之一波片。
Its request for monochromaticity of source is low. The equipments and procedure of this method are simple, but suitable for quarter-wave plates of various wave lengths.
此方法对光源的单色性要求低，新需器材及实验方法简便，并且适于各种波长的四分之一波片。
Its request for monochromaticity of source is low. The equipments and procedure of this method are simple, but suitable for quarter-wave plates of various wave lengths.
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