The production of holograms requires high quality and stable optical equipment during the recording process. To meet stability requirements, we need an optical table to reduce the vibration from the ground. To reduce air vibrations in the laboratory a glass cage is mounted on the optical table. Vibrational amplitude were reduced, and the optical set-up became more stable.
The optical set-up for recording holographic multi-stereogram constructed from computer images was arranged in two levels. This makes the set-up more flexible, and it is natural to have reference beam from above, as this is the direction of the reconstruction beam.
To produce 1-step holograms without embarrassing vertical lines from the slit of the printer is impossible. Therefore, the 2-step method is used to produce high quality multi-stereograms without lines from the slit. The master hologram's lines are not transferred to the new hologram in a 2-step procedure.
From a master transmission multi-stereogram high quality 2-step reflection and rainbow holograms are produced. This is also the method to be use in a mass production of holograms, since the recording time for a 1-step reflection hologram is about 2 hours and for a 2-step transmission hologram about 1 minute. There were produced 13 reflection holograms of good quality for EPM consultants, with the use of the 2-step method. Producing 2-step reflection and rainbow holograms from a transmission multi-stereogram was very successful.
To obtain a larger angle of view, and get a better 3-D image on the hologram, the computer pictures should have a longer camera path in the picture production.