利用合成谱在计算全息图中编码多个物体的方法

Encoding multiple objects in computer-generated holograms with synthetic spectrum

提出在迂回位相傅里叶变换计算全息图中利用合成谱记录多个物体的方法。该方法利用多个物体合成的傅里叶频谱,代替传统的迂回位相型计算全息图中的单一频谱,在一幅计算全息图中完成多个物体的编码。再现时多个物体同时再现在同一衍射级的周围,并且再现像的形式可以多种多样。采用液晶空间光调制器(LC-SLM)完成计算全息图的光学再现,实验验证了方法的有效性。结果表明:该方法可有效提高计算全息图的信息容量。

A method for encoding multiple objects by using the synthetic spectrum in Fourier transform computer generated holograms（CGH） of detour phase is proposed.The method allows multiple objects encoded in a CGH using synthesized spectrum instead of single spectrum used in conventional method.In reconstruction,multiple objects are reconstructed around the same diffraction order simultaneously,and various forms of reconstructed images are obtained easily.Optical reconstruction of the CGH was demonstrated with a liquid crystal-spatial light modulator（LC-SLM）.The experiment result verified the effectiveness of the method and it showed that the method could improve the information capacity of CGH.