Method and apparatus for the production of volume transmission and/or reflection holograms

Method for producing volume transmission and/or reflection holograms on a photosensitive film (10) having a backing foil (12), a holographic layer (14) and a protective film (16),

• wherein the film (10) is guided over a drum (18), brought in contact with a master hologram (22) on the drum (18) and moved through an exposure zone (20) together with the master hologram, in which zone the film (10) and the master hologram are irradiated with a linearly expanding exposure laser beam (32) for reproducing the master hologram in the photopolymer layer (14), wherein before and behind the area of contact of the film (10) with the drum (18), the film is guided over one respective guide roll and one respective tensioning roll (28 and 30) and wherein previously at the input and the subsequently output the protective film (16) is removed from the film (10) and re-laminated onto it via a stripping roll (42) and a lamination roll (43),
• wherein
• with use of only one drum (18) both reflection and transmission volume holograms can be produced simultaneously or individually in the photopolymer layer (14) of the film (10) guided over the drum, for which purpose two master holograms (22 and 22′) are allotted or can be allotted at least to the exposure zone (20) of the drum (18) and are moved on and synchronously with the latter and with the film (10) overlying the drum (18), wherein the first master hologram (22) being located radially outside the film (10) whereas the second master hologram (22′) is applied on the drum (18) radially inside the film (10).