Document card containing information in holographic form

Details Document card containing information in holographic form Document card containing information in holographic form

1981-08-17

1983-08-23

Pitts, Harold I.

Registers

Records

235457, 350 361, G06K 1906

Patent

active

044006160

ABSTRACT:
An identification card provided with secret data contained in the form of a wave guide hologram recorded in a layer on the card. Light for developing or displaying the hologram is introduced into a wave guide layer extending along the surface of the card through a grating that admits light only of a given wave length suitable for developing the wave guide hologram. The secrecy of the wave guide hologram is further enhanced by incorporating into the light coupling grating a further hologram by which light only of a predetermined pattern can be coupled to the wave guide for delivery to the wave guide hologram.

REFERENCES:
patent: 3620590 (1971-11-01), Barker
patent: 3647275 (1972-03-01), Ward
patent: 3858031 (1974-12-01), Kornfeld
patent: 4119361 (1978-10-01), Greenaway et al.
patent: 4143810 (1979-03-01), Greenaway
patent: 4171766 (1979-10-01), Ruell
W. Lukosz et al.: Hologram Recording and Read-Out with the Evanescent Field of Guided Waves, Optics Communications, vol. 19, No. 2, pp. 232-235, Nov., 1976.

Affiliated with

Also associated with

Rating

Document card containing information in holographic form does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Document card containing information in holographic form, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Document card containing information in holographic form will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1948630