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Polarization gratings with surface relief in dyed gelatin and their postdevelopment diffraction

机译：明胶表面起伏的偏振光栅及其后显影衍射

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Some characteristics of dyed gelatin films when polarization gratings are recorded are reported. Two dyes, Malachite Green and Methylene Blue, are used in our experiment. In particular, no dichromate was added to Methylene Blue plates before or after exposure. It is shown that, in spite of its having high viscosity, a relief grating is formed when orthogonal linearly polarized beams are superimposed upon the plates. In contrast with previous observations in another photoanisotropic medium, the frequency of the gelatin relief grating does not depend on the directions of the electric field of the orthogonal recording beams. Besides, when orthogonal circularly polarized beams are used in the formation of polarization gratings, no relief grating is produced, Finally, we study the phase modulation obtained after dehydration of the gelatin plates in which the polarization gratings were formed. Postdevelopment phase gratings do not preserve the polarization information of the interference pattern. Also, the grating frequency is increased by a factor of 2 for linear polarization, whereas for circular polarization there is no phase modulation. (C) 2002 Optical Society of America. [References: 25]
机译：记录偏振光栅时染色明胶膜的一些特性。在我们的实验中使用了两种染料，孔雀石绿和亚甲基蓝。特别地，在曝光之前或之后，没有将重铬酸盐添加到亚甲基蓝板中。可以看出，尽管其具有高粘度，但当正交线性偏振光束叠加在板上时，仍形成起伏光栅。与先前在另一种光各向异性介质中的观察结果相反，明胶释放光栅的频率不取决于正交记录光束的电场方向。此外，当使用正交圆偏振光束形成偏振光栅时，没有产生浮雕光栅。最后，我们研究了形成偏振光栅的明胶板脱水后获得的相位调制。显影后的相位光栅不保留干涉图案的偏振信息。同样，对于线性偏振，光栅频率增加2倍，而对于圆形偏振，则没有相位调制。 （C）2002年美国眼镜学会。 [参考：25]

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