Hologram judging apparatus
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United States of America Patent
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Feb 19, 2013
Grant Date -
Nov 18, 2010
app pub date -
Apr 22, 2010
filing date -
May 14, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A hologram judging apparatus includes a housing and first and second light sources attached to the housing and emitting reconstruction illumination light. In the hologram judging apparatus, the first and second light sources each include a wavelength component with a wavelength λ meeting the reconstruction condition of a Lippmann hologram, and any one of the first and second light sources is a light source making the reconstruction illumination light enter a hologram at an angle θref which is identical to another angle θref with respect to the normal in a plane of incidence, the other angle θref meeting the reconstruction condition of a Lippmann method.
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