Optionally transferable optical system with a reduced thickness
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United States of America Patent
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Jan 12, 2021
Grant Date -
Dec 25, 2014
app pub date -
Aug 17, 2012
filing date -
Aug 19, 2011
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Abstract
An optionally transferable optical system with a reduced thickness is provided. The inventive optical system is basically made up of a synthetic image presentation system in which one or more arrangements of structured image icons are substantially in contact with, but not completely embedded within, one or more arrangements of focusing elements. The focusing element and image icon arrangements cooperate to form at least one synthetic image. By way of the subject invention, the requirement for an optical spacer to provide the necessary focal distance between the focusing elements and their associated image icon(s) is removed. As a result, overall system thicknesses are reduced, suitability as a surface-applied authentication system is enabled, and tamper resistance is improved.
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