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Unformatted text preview: the mirror, the reference beam is reunited with the object beam
on the film. Because one beam interacted with the object and the other didn’t,
the two beams will be out of phase and interfere with one another. This
interference pattern is imprinted upon the holographic film plate, creating the
This pattern records the intensity distribution of the reflected light just as an
ordinary camera does. However, it also records the phase distribution. This
means that it contains information about where the waves are in their
oscillating cycles as they strike the film. To determine this the object beam
must be compared with the reference beam. This is accomplished via the
interference. Also unlike an ordinary photo, a hologram contains all its
information in every piece of it.
When viewed in coherent light the object appears in 3-D and viewing a
hologram from different angles will reveal the object from different angles. Luminous Flux & Illuminance Luminous flux, Φ, is the rate at which an object emits visible light
(adjusted to the responsiveness of the human eye, which is most
sensitive to ye...
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- Fall '11