Cylindrical lens and a manufacturing method for the same
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United States of America Patent
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Aug 10, 1993
Issued Date -
N/A
app pub date -
Nov 4, 1991
filing date -
Mar 23, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lens in a shape of cylinder or head-cut-off cone made of transparent thin film materials with a fine prism-shaped fresnel lens surface formed thereon. The cylindrical lens is manufactured by forming a fine prism-shaped linear fresnel lens surface on a thin transparent film, shaping the film into a cylinder or a frustum of a cone, and connecting both ends of the film so that the fresnel center line forms a horizontal ring.
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Cited Art Landscape
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