f-.theta. Lens system
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United States of America Patent
Stats
-
Aug 30, 1983
Grant Date -
N/A
app pub date -
Jul 13, 1981
filing date -
Jul 15, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An f-.theta. lens system comprising the first lens element which is a positive lens, the second lens element which is a negative lens and the third lens element which is a positive lens. This lens system can be formed as a small lens of a wide angle and has a focusing ability close to the diffraction limit.
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