US 6,856,468 B2 · Zoom lens

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 α different from 0° and 180°. A beam deflector (18) is arranged between the first base lens group (G4.1) and the second base lens group (G4.2).

Claims22

Dependent claims

A zoom lens, comprising in a direction of light propagation:

a front lens group having positive refractive power,
a variator lens group having negative refractive power,
a compensator lens group having positive refractive power,
a base lens group having positive refractive power,
wherein said base lens group comprising a first base lens group and a second base lens group,
wherein said front lens group, said variator lens group, said compensator lens group and said first base lens group are arranged along a common straight first optical axis,
wherein said second base lens group is arranged along a second optical axis inclined with respect to said first optical axis at a first angle α different from 0 and 180°, and
wherein a beam deflector is arranged between said first base lens group and said second base lens group.

5 more elements

Dependencies are inferred from the claim text.

Zoom lens

Life of this patent

Zoom lens

Life of this patent

Abstract

Claims22