Optical sheet for use in manufacturing a cylindrically shaped optically correct visor and method of manufacturing said visor
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United States of America Patent
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May 17, 2005
Grant Date -
Aug 12, 2004
app pub date -
Nov 18, 2003
filing date -
Nov 18, 2002
priority date (Note) -
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Abstract
A plano-convex optical sheet having a positive power including: a substantially planar inner surface; opposed lateral edges, and a thickness s that is decreasing proceeding from a transversal central line passing through the geometric center of the optical sheet towards said opposed lateral edges along a portion of predetermined width w of the optical sheet, so as to define a convex outer surface having a curvature such that the optical sheet is capable of providing once bent a cylindrically shaped optically correct visor.
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