Optical safety element and system for visualising hidden...

Details Optical safety element and system for visualising hidden... Optical safety element and system for visualising hidden...

2004-06-16

2010-06-15

Pritchett, Joshua L (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S567000, C359S569000, C359S574000

Reexamination Certificate

active

07738173

ABSTRACT:
The invention concerns an optical security element and a system for visualising items of concealed information comprising such an optical security element. The optical security element has a substrate layer in which a relief structure defined by relief parameters, in particular relief shape, relief depth, spatial frequency and azimuth angle, is shaped in the surface region defined by an X-axis and a Y-axis, for producing an optically perceptible effect. One or more of the relief parameters defining the relief structure are varied in the surface region in accordance with a parameter variation function. The surface region is divided into one or more pattern regions and a background region. One or more of the relief parameters defining the relief structure are varied in the one or more pattern regions in accordance with a parameter variation function which is phase-displaced in relation to the parameter variation function of the background region. There is further provided a verification element which has a verification grating which is defined by a periodic transmission function and whose period corresponds to the period of the parameter variation function.

REFERENCES:
patent: 5032003 (1991-07-01), Antes
patent: 5969863 (1999-10-01), Staub et al.
patent: 5999280 (1999-12-01), Huang
patent: 6036233 (2000-03-01), Braun et al.
patent: 6062604 (2000-05-01), Taylor et al.
patent: 6088161 (2000-07-01), Lee
patent: 6157487 (2000-12-01), Staub et al.
patent: 6283509 (2001-09-01), Braun et al.
patent: 6324004 (2001-11-01), Staub et al.
patent: 6351537 (2002-02-01), Dovgodko et al.
patent: 6369919 (2002-04-01), Drinkwater et al.
patent: 6417968 (2002-07-01), Staub et al.
patent: 2001/0043396 (2001-11-01), Lee
patent: 195 16 741 (1996-07-01), None
patent: 195 16 741 (1996-11-01), None
patent: 100 44 465 (2002-03-01), None
patent: 0 520 363 (1992-12-01), None
patent: 0 992 020 (2000-04-01), None
patent: 1 102 208 (2001-05-01), None
patent: 02-051315 (1990-04-01), None
patent: 06-067608 (1994-03-01), None
patent: 2003-72219 (2003-03-01), None
patent: 2161092 (2000-12-01), None
patent: 2172679 (2001-08-01), None
patent: 2201613 (2003-03-01), None
patent: WO9504948 (1995-02-01), None
patent: WO 99/65699 (1999-12-01), None
patent: WO 01/80175 (2001-10-01), None
patent: WO0200446 (2002-01-01), None
patent: WO 02/100653 (2002-12-01), None
patent: WO 03/009225 (2003-01-01), None
Isaac Amidror and Rogert D. Hersch: “Fourier-based analysis and synthesis of moires in the superposition of geometrically transformed periodic structures”, Journal of the Optical Society of America A/vol. 15, No. 5, published May 1998.
Brockhaus “Physik ABC”, vol. 2/Ma-Z, published 1989.
Japanese Office Action from Application No. 2006-515945, dated Dec. 15, 2009.

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