Zoom lens
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United States of America Patent
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Feb 15, 2005
Grant Date -
Oct 14, 2004
app pub date -
Oct 21, 2003
filing date -
Oct 23, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A zoom lens comprises in a direction of light propagation a front lens group (G1) having positive refractive power, a variator lens group (G2) having negative refractive power, a compensator lens group (G3) having positive refractive power, and a base lens group (G4) having positive refractive power. The base lens group (G4) comprises a first base lens group (G4.1) and a second base lens group (G4.2). The front lens group (G1), the variator lens group (G2), the compensator lens group (G3) and the first base lens group (G4.1) are arranged along a common straight first optical axis (23). The second base lens group (G4.2) is arranged along a second optical axis 23') inclined with respect to the first optical axis (23) at a first angle .alpha. different from 0.degree. and 180.degree.. A beam deflector (18) is arranged between the first base lens group (G4.1) and the second base lens group (G4.2).
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