Method of producing a microstructured product
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United States of America Patent
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Jun 17, 2014
Grant Date -
Mar 10, 2011
app pub date -
Dec 19, 2008
filing date -
Dec 28, 2007
priority date (Note) -
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Abstract
The present invention provides a method of producing a two-sided microstructured product and a registration structure that can be used for the method. The method comprises the steps of: (800) providing primary product features (80) at a first surface of a substrate sheet (50); (810) providing secondary product features (90) at an opposed surface; (820) registering the mutual alignment of the primary and secondary product features (80, 90) to estimate alignment parameters; and (830) aligning the provision of primary and secondary product features (80, 90). The registration structure comprises a registration-array of focusing elements (20) at a first surface and a registration-array of reference objects (30) at an opposed surface aligned with primary and secondary product features (80,90) that provides a holographic representation (10) of the reference objects (30) in order to estimate the alignment of product features (80,90).
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