自制全色超细颗粒卤化银乳剂及其反射全息特性

实验制备了颗粒平均尺寸为10mm且具有一定的红、绿和蓝色灵敏度的超细颗粒卤化银乳剂，对影响颗粒尺寸和光谱灵敏度的若干制备条件进行了讨论；实验研究了用该乳剂记录的反射全息光栅的衍射特性。实验结果表明，用改进了的AAC显影液和R-10漂白液处理，当用红光(633nm)或绿色(515nm)记录时，反射全息光栅的衍射效率可达55％，需要的曝光量分别为1．8mJ／cm^2、2．2mJ／cm^2；当用蓝光(458nm)记录且曝光量为3．3mJ／cm^2时，衍射效率达50%。     

光盘道间距及其信道轨迹长度的测量

基于光盘的结构,将光盘抽象为一个反射光栅的模型,从而测出了光盘的道间距及信道轨迹长度.     

在可光化聚合的混合物上实时记录全息反射光栅

在可光化聚合的混合物上实时记录全息反射光栅与现有用于记录体全息图的介质［１，２］相比，我们研究的可光化聚合混合物－２８的特殊性质是，能够直接在记录过程形成相位结构［３］。混合物－２８含有能聚合的化合物、急速聚合的引发剂和中性稳定成分。材料在３００～５...     

Excellent polarization-independent reflector based on guided mode resonance effect

A broad band polarization-independent reflector working in the telecommunication C+L band is proposed using the guided mode resonance effect of a periodic surface relief element deposited by a layer of silicon medium. It is shown that this structure can provide high reflection (R>99.5%) and wide angular bandwidth (θ≈20°, R>98%) for both TE and TM polarizations over a wide spectrum band 1.5 μm～1.6 μm. Furthermore, it is found by rigorous coupled wave analysis that the polarization-independent reflector proposed here is tolerant of a deviation of grating thickness, which makes it very easy to fabricate in experiments.