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Laser marked device
申请公布号：US9333787(B2)
申请号：US201414268846
申请日期：2014.05.02
申请公布日期：2016.05.10
发明人：Cape Samuel M.;Gosnell Jonathan D.;Helminen Kaj Markkus;Jordan Gregory R.;Palm Scott K.;Prett Giles D.;Schneider Timothy W.;Zucchero Anthony J.
分类号：B41M5/26;G07D7/00;B42D25/29;B42D25/41;B42D25/324;G02B3/00
主分类号：B41M5/26
代理人：Holland & Bonzagni, P.C. ;Bonzagni, Esq. Mary R.
地址：Alpharetta GA US
摘要：An optical device projecting one or more synthetically magnified images that has been laser marked with one or more static two dimensional (2D) images is provided. The static 2D image(s) laser marked on or within this device and the synthetically magnified image(s) projected by this device help determine the authenticity of a document (e.g., passport data page) or product that employs it. Several embodiments of the inventive device also offer increased resistance to tampering or alteration and wear.
主权项：1. A method for laser marking one or more static two dimensional images on or within a device that embodies or comprises an optical film material, wherein the optical film material projects at least one synthetically magnified image, wherein the method comprises: identifying one or more layers or interfaces within the optical film material that may be damaged by laser energy, or by heat or gas generated by laser absorption within a laser receptive layer, wherein said layers or interfaces are laser sensitive layers or interfaces; either positioning one or more layers markable by laser energy above the laser sensitive layer or interface, positioning one or more thermal spacer layers and one or more laser markable layers below the optical film material, the one or more thermal spacer layers being located between the optical film material and the one or more laser markable layers, wherein the thermal spacer layer protects against the damage that may be caused by the laser energy, heat or gas generated during laser marking, modifying the laser sensitive interface to increase the bond strength and/or thermal resistance of the interface, or replacing the laser sensitive layer with a layer made from a material with a higher bond strength and/or a higher thermal resistance; optionally, molding the layers together using heat and pressure to form a device that embodies the optical film material; and exposing the device to laser energy so as to mark one or more static two dimensional images on or into the one or more laser markable layers.