Patent ID: 8379281

Claim:
A hologram judging apparatus comprising: a housing; and first and second light sources attached to the housing and that emit reconstruction illumination light into an interior of the housing, wherein, the housing is such that only reconstruction illumination lights from the first and second light sources are effective to permit evaluation of a purported Lipmann hologram within the housing, each of the reconstruction illumination lights from the first and second light sources includes a wavelength component with a wavelength λ meeting a reconstruction condition of an authentic Lippmann hologram, the reconstruction illumination light of any one of the first and second light sources enters the hologram at an angle θref which is identical to another angle θref with respect to a normal in a plane of incidence, the another angle θref meeting a reconstruction condition of a Lippmann method, the genuineness of the purported Lippmann hologram can be determined based on the visibility and appearance of any reconstruction of the Lippmann hologram within the housing using the reconstruction illumination lights from the first and second light sources.