指出了非对称双级闪耀光栅实现莫尔条纹倍增理论的实质，并简化了实现高倍数光学细分的手段。
The fundamentality of fringe multiplication in DMNG is pointed out. and the means to realize optical subdivision with high multiple is simplified.
图6.20所示为一台市售的条纹倍增和细化装置，它安装在一台便于使用的专门设计的偏振光弹仪上。
Figure 6. 20 illustrates a commercially available fringe multiplication and fringe sharpening apparatus mounted on a polariscope specially designed to facilitate these applications.
除了主应力和条纹外，还有许多细栅格线，因此利用富氏光学系统可使应力条纹得到倍增。
Many fine gratings are observed on the isopachic pattern. The multiplication is easy to perform by using Fourier Filter System.
除了主应力和条纹外，还有许多细栅格线，因此利用富氏光学系统可使应力条纹得到倍增。
Many fine gratings are observed on the isopachic pattern. The multiplication is easy to perform by using Fourier Filter System.
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