Multifocal optical elements
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United States of America Patent
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May 26, 1998
Issued Date -
N/A
app pub date -
May 31, 1995
filing date -
Mar 3, 1995
priority date (Note) -
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Abstract
A multi-focal lens with both a power portion and a functional portion where the power portion imparts a majority of the optical power and magnification characteristics to the multi-focal lens and has a front side with both a main focal surface and a secondary focal surface that is recessed relative to the main focal surface and where the functional portion has a rear side that is shaped like the front side of the power portion with the rear side of the functional portion being affixed to the front side of the power portion.
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