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1.前言全息光栅通常是用双光束干涉系统制造在光敏的位相型材料上。干涉条纹是正弦强度公布的,但是槽形不一定是正弦形的,因为存在曝光和显影条件的变化。Sheridon指出,当干涉场的波节面与光敏层倾斜时,显影后获得锯齿轮廓的槽形。这样的平面全息光栅具有和刻划光栅那样好的闪耀效率。从原理上来讲,全息光栅是没有任何周期误差,并且制造时间比刻划光栅短得
1. Introduction Holographic gratings are usually fabricated on photosensitive phase-sensitive materials using a two-beam interference system. Interference fringes are published with sinusoidal strength, but the grooves are not necessarily sinusoidal because of variations in exposure and development conditions. Sheridon pointed out that when the nodal plane of the interfering field is tilted with the photoactive layer, the groove shape of the serrated profile is obtained after development. Such a planar holographic grating has as good sparkling efficiency as a scored grating. In principle, holographic gratings have no periodic error and are manufactured shorter than scored gratings