Making A Hologram
What is a hologram?
• A hologram is a 3-D image constructed from the
interference of two coherent light beams; a
reference beam, and an object beam.
• The object beam possesses the intensity and
spatial information regarding the object as a
result of reflecting off the object.
• The reference beam comes directly from the
source and interferes with the object beam.
• As these two beams meet at the holographic
film, an interference pattern (hologram) results.
Choosing an Object
• The following criteria should be considered
when choosing your object…
– It should be made of a solid material such as
keys, or pocket change. No furry objects or
– It must appear bright when illuminated with
red laser light. No dark colored objects.
– It must not move or deform.
– Shiny, bright ceramic figurines work great!
An Overview of the Process
• We will be constructing a “white light reflection
• Utilizing the “contact copy” method, the holographic
plate (holoplate) is leaned directly against the object
during the exposure process.
• After exposure, the holoplate is developed in a “dark
room” (green light only).
• The holoplate is EXTREMELY sensitive to vibration
during the exposure process. Therefore NO
TALKING is permitted during the process (the
hologram results from interference of light waves).
• You will be asked to REMAIN STILL ( NO
WALKING). You will, however be allowed to
• Place a latex glove on the hand with which you will be
holding the holographic plate (holograf). The object will
be held with your other hand. Wait on the right side of
the room (facing my desk) until called upon to start the
• The vertical notebook at my desk acts as the shutter.
Make sure that the notebook prevents light from shining
on the sandbox.
• Place your object in the middle of the sandbox.
• I will place the holograf on your object at the proper
• Wait 10 seconds, then lift the notebook off the table…the
notebook should still be blocking the laser light.
• Wait 5 more seconds.
• Bring the notebook towards you, exposing the holograf
and object to the laser light. Expose the holograf for 20
• Block the light with the notebook, then set it GENTLY
onto the desktop.
• Pick up your holograf carefully, grasping the EDGES
with your gloved hand, your object with the other.
• Go to the table nearest you to rinse your holograf.
GENTLY swish your holograf. It MUST NOT touch the
bottom of the dish. Do this for 10 seconds, then place a
paper plate under your holograf (to prevent drips) as you
move to the next tray on your left.
• Swish in the Developer for 30 seconds (grasp EDGES).
• Now advance to the nest table to rinse again for
30 seconds (use that paper plate to avoid drips,
• Swish in bleach until it turns clear in about 60
• Rinse again for 30 seconds.
• Swish in Wetting Solution for 30 seconds.
• Lastly, rest the hologram nearly vertically in the
paper bowl. Your name should already be on the
• Let it dry until tomorrow.
Viewing Your Hologram
• The hologram may be illuminated with white light
(other than fluorescent lights). Spot lights are
best. They should be oriented at the same
position the original source was at. The
hologram may be viewed with the light source
reflecting off the hologram, so this is a
• If monochromatic and coherent light is shone
THROUGH the plate in order to view the
hologram, the hologram is a TRANSMISSION