Two-unit zoom lens system
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United States of America Patent
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-
Jul 30, 1996
Grant Date -
N/A
app pub date -
Mar 25, 1994
filing date -
Mar 26, 1993
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A low-cost, high-performance two-unit zoom lens system for use with a compact camera, which has a zoom ratio of about 2 to 2.5. The zoom lens system has a 1-st lens unit (G1) of positive power, and a 2-nd lens unit (G2) of negative power. The 1-st lens unit (G1) is composed of a plastic lens (L1) of extremely small power having an aspherical surface, and a positive lens group consisting of lens elements (L2) and (L3). The 2-nd lens unit (G2) is composed of a positive lens (L4), and a negative lens (L5) having an aspherical surface.
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