cutting steel pipes to hold optical components
the holographic recording set-up is built-up on a concrete slab
the slab "floats" on six inner tubes for vibration isolation
steel pipes are filled with sand to minimize ringing (movement) like a tuning fork
mining an image
black foam-core is used all around to prevent
air and
temperature changes
during the exposure
after exposure and processing,
part of the emulsion is removed before lamination
pouring an x of optical epoxy on the
hologram
to seal it from the environment
slowly lowering the cover glass onto the epoxy
and hologram to prevent trapping air bubbles