superimposed holograms only

Holographic processes or apparatus using light, infrared, or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto > Processes or apparatus specially adapted to produce multiple holograms or to obtain images from them, e.g. multicolour technique > superimposed holograms only

Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto > Processes or apparatus specially adapted to produce multiple holograms or to obtain images from them, e.g. multicolour technique > superimposed holograms only