Abstract A Fourier transform hologram image is created on a sheet on the seal. The image is made, by making a die from the Fourier transform hologram image master plate and by molding resin on the die. The image formed on the sheet is reconstructed by an identification apparatus. The identification apparatus contains the laser emitting device and the screen for receiving the reflecting laser beam. The laser beam is illuminated vertically against the sheet from the laser emitting device. The laser beam reflected from the sheet surface is received by the screen, and the image of the sheet is reconstructed on the screen. At this time, it is possible to check whether the laser beam is reaching the sheet from an opening in the casing.
An identification apparatus including: a casing including a laser beam reflection area for receiving a seal having a holographic image formed thereon and an opening near said laser beam reflection area; laser emitting means, attached to said casing, for illuminating vertically a laser beam on a hologram surface of said seal having the holographic image formed thereon; screen means, attached to said casing, for receiving the laser beam reflected from the hologram surface and displaying the holographic image thereon; and lens means in said casing for adjusting divergency of said laser beam.
Claim 2
Dependent Claim
92 words
An identification apparatus including: a casing including a laser beam reflection area for receiving a seal having a holographic image formed thereon and an opening near said laser beam reflection area; laser emitting means, attached to said casing, for illuminating vertically a laser beam on a hologram surface of said seal having the holographic image formed thereon; screen means, attached to said casing, for receiving the laser beam reflected from the hologram surface and displaying the holographic image thereon; and lens means in said casing for adjusting divergency of said laser beam.
Claim 3
Dependent Claim
19 words
An identification apparatus in accordance with claim 1, wherein said screen has a transmission divergency and a concave-convex surface.
Claim 4
Dependent Claim
56 words
An identification apparatus in accordance with claim 2, further including power source means, in said casing and connected to said laser emitting means, for supplying power to said laser emitting means and timer switch means for turning off the power source means to interrupt power to said laser emitting means after a predetermined period of time.