Security device

Security device

  • CN 1,910,523 B
  • Filed: 01/13/2005
  • Issued: 12/07/2011
  • Est. Priority Date: 01/13/2004
  • Status: Active Grant
First Claim
Patent Images

1. safety feature, it comprises the microstructure of response incident radiation playback concave-convex surface of visible hologram in vision area, this hologram comprises first holographic image element at least in the image surface that separates with micro-structure surface, this device shows at least one other image in the face that the described image surface with first holographic element separates, wherein the interval between the first holographic element image surface and this other image surface makes when tilting gearing, first holographic image element reveals significantly mobile with respect to this other image table, for tilting at least 6 millimeters of every radians, and described total parallax displacement is at least 20% a distance along this plant bulk of parallax directions to the product of the included angle of the ratio at total visual angle and vision area to total parallax displacement to the ratio at total visual angle.

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