Method of producing a sheet having lenticular lens in...

Optical: systems and elements – Single channel simultaneously to or from plural channels – By surface composed of lenticular elements

Reexamination Certificate

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C359S900000

Reexamination Certificate

active

06995914

ABSTRACT:
A method of producing a lenticular sheet having anisotropic optical properties comprising the steps of providing a body of transparent material having a pair of opposing sides and an index of refraction greater than one; forming a plurality of lenses on the first side of said pair of opposing sides in pre-selected portions of the first side; and wherein the remainder of the first side of said pair of opposing sides outside the pre-selected lens portions is generally flat and transparent. A method of manufacturing a lenticular sheet comprising the steps of producing a transparent sheet by engraving a desired lens pattern over an entire cylinder or flat plate; placing a mask over selected lens areas; metal plating the unmasked areas to a thickness greater than the surface of the masked areas; and cutting the plated areas back to the level of the masked areas.

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patent: 5362351 (1994-11-01), Karszes
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patent: 6596361 (2003-07-01), Klein et al.
patent: 6624946 (2003-09-01), Franko, Sr.
US 6,375,636, 04/2002, Conley (withdrawn)

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