一步法大景深反射全息图  

One-step large scene depth reflection hologram

作　　者：张正贺[1] 梁桂荣[2] 

机构地区：[1]湛江师范学院物理与技术学院,广州湛江524048 [2]重庆大学数理学院,重庆400030

出　　处：《激光杂志》2007年第6期55-56,共2页Laser Journal

摘　　要：本文对反射全息图白光再现时由于光谱展宽造成的像模糊进行具体的几何分析,在此基础上提出了大景深反射全息图,并在旁轴近似条件下推导出它的景深表达式。实验上,利用一步法制作了一张景深为63厘米的大景深反射全息图,在普通点光源再现下获得了观察效果很好的大景深再现像。优于大景深彩虹全息图的是,大景深反射全息图具有更强的景深表达能力,更大的视场和自由的视差,再现像的立体感非常强烈。这些优点在计算和实验结果中得以充分体现。The image blur of reflectio hich is caused by the widened spectrum when the hologram is reconstmcted by white light, is analyzed via geometrical method in this paper. Based on the analysis, the large scene depth reflection hologram is adwanced, and the expression of its depth is deducted depending on the condition of paraxial approximation. A one - step large scene depth reflection hologram which＇ s depth is 63 centimeters has been done in experiment, and the reconst .ruction image of large depth, which is reconstructed in normal point light source, has good effect for enjoying. Compared with large depth rainbow holo gram, the retlection hologram has better power to express its depth, wider field, and free disparity also. So the third dimension of its reconstruction image is very strong. All of these are incamated via the aceotmt and the result of experiment in this peper.

关 键 词：反射全息图 景深 布喇格条件 耦合波理论 

分 类 号：O438.1[机械工程—光学工程]