| 摘要 |
An optical method for copying holograms from an original. The photographic support on which a copy is to be made, is positioned behind the original hologram and the whole is exposed to the monochromatic coherent light; the original and the copying supports need not be in contact and the copy is not a reproduction of the original hologram but has the same image forming capabilities as the latter. The exposed copy is processed according to conventional photographic technics. |
