大视角二维/三维彩虹全息标识记录

Recording the Large Viewing Angle 2D/3D Marking Rainbow Hologram

提出了一种记录透射标识二维／三维彩虹全息图的新方法，它直接用散射狭缝光照明二维透射标识，将透射光记录为主全息图；主全息图可按普通二步彩虹一样进行二维／三维的分色、分层次记录，既保持了普通二步彩虹全息的分色、分层次的效果，又突破了普通主全息图面积和长度对再现像亮度和视角的限制，达到大视角、高亮度的效果；对光路的可行性和设置参数进行了详细的分析和讨论，相应的实验得到了满意的结果。

A new method of recording the transmission marking 2D/3D rainbow hologram was put forward. It uses directly a scattered slit beam to illuminate the 2D transmission marking. The transmitted light was recorded on the master hologram. The latter can be recorded according to the colour separation and layer separation like the general twostep rainbow hologram. But it broke through the limit of the length and area of the general hologram on the brightness and the viewing angle of the reconstructed image, thus the large viewing angle and high brightness were achieved. The feasibility and parameters of the optical setup were discussed in detail and the satisfactory experimental results were obtained.