All plastic projection lens assembly with aspheric surface
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United States of America Patent
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-
Dec 23, 1980
Grant Date -
N/A
app pub date -
Jun 12, 1978
filing date -
Jun 12, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An all plastic lens assembly having a lens cell or housing and at least four separate airspaced lens elements mounted in the cell or housing, the lens elements are formed of plastic and at least one of the lens elements has an aspheric surface.
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