Variable focus lens by small changes of the equatorial lens diameter
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United States of America Patent
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-
Dec 10, 2002
Grant Date -
Nov 15, 2001
app pub date -
Jun 11, 2001
filing date -
May 12, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A variable focus lens is constructed by making small changes in the equatorial diameter of an elastically deformable lens. The lens may be deformed by radial tension exerted in a plane generally perpendicular to the optical axis. The radial tension may be exerted by radially acting mechanical apparatus or by means of rings embedded or attached at the equator of the lens, whose diameter can be altered by heating, or by imposition of electrical or magnetic fields.
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