Security device using parallax movement to view front and...

Details Security device using parallax movement to view front and... Security device using parallax movement to view front and...

2005-01-13

2010-11-23

Allen, Stephone B (Department: 2872)

Optical: systems and elements

Holographic system or element

Authentication

C359S032000, C359S033000, C283S086000

Reexamination Certificate

active

07839546

ABSTRACT:
A security device including a surface relief microstructure which, in response to incident radiation, replays a hologram viewable within a viewing zone, the hologram including at least a first holographic image element in an image plane spaced from the surface of the microstructure. The device exhibits at least one further image in a plane spaced from the image plane of the first holographic element. On tilting the device, the first holographic image element exhibits apparent movement relative to the further image, which when expressed in radians, a rate of parallax movement per radian equals the spacing between phones and the product of the rate of movement and the included angle of the viewing zone defining a distance at least 20% of the dimension of the device in the direction of movement of the first holographic image element.

REFERENCES:
patent: 4568141 (1986-02-01), Antes
patent: 5447335 (1995-09-01), Haslop
patent: 5694229 (1997-12-01), Drinkwater et al.
patent: 6369919 (2002-04-01), Drinkwater et al.
patent: 6765704 (2004-07-01), Drinkwater
patent: 2003/0151786 (2003-08-01), Drinkwater
patent: 2004/0121241 (2004-06-01), Kodama
patent: WO 00/73991 (2000-12-01), None
Rhody et al.; “Holography Marketplace: 7thEdition;” XP-002329256; pp. 24-25; 1998.

Affiliated with

Also associated with

Rating

Security device using parallax movement to view front and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Security device using parallax movement to view front and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Security device using parallax movement to view front and... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4190466