美国麻省理工学院教授、彩虹全息的发明者Stephen A.Benton曾说,全息照相的几个主要问题是:象的亮度、象的对比度、象的景深和全息图的尺寸。有人认为,追求大尺寸(即巨幅的全息照相)是全息工作者的重要方向之一。然而,全息图的尺寸是越大越好吗?目前,大尺寸的全息图已经比以往做得更大,但是,增加尺寸的趋势却逐渐缓慢下来。本文将对全息图的尺寸问题作一简要评述。 Stephen A. Benton, a professor at the Massachusetts Institute of Technology and inventor of rainbow holography, said that the major problems with holography are the brightness of the image, the contrast of the image, the depth of field of the image, and the size of the hologram. Some people think that the pursuit of large size (ie, huge holograms) is one of the holographic workers an important direction. However, the bigger the hologram size, the better? At present, large-size holograms have been done more than ever before, but the trend of increasing size is slowly slowing down. This article will make a brief review of the size of the hologram.