在实验中我们通过调节两光栅的有效使用面积，将两谱线的能量比例控制在1∶1左右。
The effective acreages of two gratings are adjusted to keep the energy proportion of two lines under the 1:1.
一般来说有效面积较大的光栅对应的谱线较强。
In general, the corresponding line of the grating with bigger effective acreage is stronger than others.
制作具有光变图像（OVD）光栅条纹的大面积全息原版，是激光图像无油墨印刷的核心技术之一。
The technology to make a large area master with the grating of optically variable device (OVD) is role in holographic image embossing.
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