Blanco-Garoía J, Fernández J L, Pérez-Amor M
Appl Opt. 1992 Feb 1;31(4):488-96. doi: 10.1364/AO.31.000488.
The practical use of holographic interferometry in nondestructive testing leads to many situations in which the characteristics of the fringe patterns make the observation and subsequent interpretation of the fringes difficult. Fringe control may then be employed to correct the troublesome parameters, the most commonly treated of which is fringe spacing. To gain more powerful control, a novel method is presented here that also permits one to change the localization of the fringe pattern. General vectorial expressions are derived that relate a tilt in the reference beam to a change in the fringe localization. Moreover the changes introduced into the fringe vector by this tilt can be suppressed by an adequate shift of the illumination beam focus. Some illustrative examples for a plane object are presented.
全息干涉术在无损检测中的实际应用会导致出现许多情况，其中条纹图案的特性使得条纹的观察和后续解释变得困难。此时可采用条纹控制来校正这些棘手的参数，其中最常处理的是条纹间距。为了获得更强大的控制能力，本文提出了一种新颖的方法，该方法还允许改变条纹图案的定位。推导了将参考光束的倾斜与条纹定位的变化相关联的一般矢量表达式。此外，通过适当地移动照明光束焦点，可以抑制由这种倾斜引入到条纹矢量中的变化。给出了一些平面物体的示例。
