Zoom lens system

Claim 2

A zoom lens system comprising a zooming lens component and a relay lens component wherein said relay lens component includes a movable lens component of no power which is moved along the optical axis thereof to compensate the fluctuation of aberration of the zoom lens system caused by the axial movement of the zooming lens component accompanying the zooming operation.

Claim 3

A zoom lens system as defined in claim 1 wherein said zooming lens component comprises a focussing lens component, a variator lens component and a compensator lens component arranged in this order along the optical axis thereof, and a part of said relay lens component is moved along the optical axis in association with the movement of said zooming lens component.

Claim 4

A zoom lens system as defined in claim 1 wherein said zooming lens component comprises a focussing lens component, a variator lens component and a compensator lens component arranged in this order along the optical axis thereof, and said relay lens component comprises at least one fixed relay lens component and at least one movable relay lens component of no power arranged along the optical axis behind said compensator lens component, and said movable relay lens component is moved in association with said zooming lens component.

Claim 5

A zoom lens system as defined in claim 3 wherein said zooming lens component and said fixed relay lens component constitute an afocal lens system, whereby said movable relay lens component is moved in parallel rays.

Claim 6

A zoom lens system as defined in claim 1 wherein said zooming lens component comprises a focussing lens component, a variator lens component and a compensator lens component arranged in this order along the optical axis thereof, and a part of said relay lens component is moved along the optical axis in association with the movement of said variator lens component.

Claim 7

A zoom lens system as defined in claim 3 wherein said relay lens component comprises a first fixed relay lens component, a movable relay lens component of no power and a second fixed relay lens component arranged in this order along the optical axis behind said compensator lens component, and said movable relay lens component is moved in association with said variator lens component.

Claim 8

A zoom lens system as defined in claim 1 wherein said zooming lens component comprises a focussing lens component, a variator lens component and a compensator lens component arranged in this order along the optical axis thereof, and a part of said relay lens component is moved along the optical axis in association with the movement of said compensator lens component.

Claim 9

A zoom lens system as defined in claim 7 wherein said relay lens component comprises a first fixed relay lens component, a movable relay lens component of no power and a second fixed relay lens component arranged in this order along the optical axis behind said compensator lens component, and said movable relay lens component is moved in association with said compensator lens component.

Claim 10

A zoom lens system as defined in claim 1 wherein said zooming lens component comprises a focussing lens component, a variator lens component and a compensator lens component arranged in this order along the optical axis thereof, and said relay lens component as a whole is moved along the optical axis in association with the movement of said variator lens component.

Claim 11

A zoom lens system comprising six lens components having a common optical axis and arranged in order, a focussing lens component, a variator lens component movable along the optical axis for varying the focal length of the lens system, a compensator lens component movable along the optical axis in association with the variator lens component, a first relay lens component of positive power, a second relay lens component of no power movable along the optical axis in association with the variator lens component, and a third relay lens component of positive power, said first and third relay lens components being fixed and said second relay lens being moved therebetween.

Claim 12

A zoom lens system comprising six lens components having a common optical axis and arranged in order, a focussing lens component, a variator lens component movable along the optical axis for varying the focal length of the lens system, a compensator lens component movable along the optical axis in association with the variator lens component, a first relay lens component of positive power, a second relay lens component of no power movable along the optical axis in association with the variator lens component, and a third relay lens component of positive power, said first and third relay lens components being fixed and said second relay lens being moved therebetween.

Claim 13

A zoom lens system as defined in claim 10 wherein said lens components satisfies the following conditions: R 1 = -263.158 d 1 = 1.3 N 1 = 1.7618 R 2 = 63.091 d 2 = 7.02 N 2 = 1.5725 R 3 = -133.333 d 3 = 0.2 R 4 = 76.336 d 4 = 4.62 N 3 = 1.6935 R 5 = -256.41 d 5 = 0.2 R 6 = 36.496 d 6 = 3.15 N 4 = 1.6935 R 7 = 58.824 d 7 = 1.067 R 8 = 28.986 d 8 = 1.0 N 5 = 1.6935 R 9 = 14.245 d 9 = 6.0 R10 = -29.586 d10 = 0.8 N 6 = 1.6935 R11 = 29.586 d11 = 2.8 N 7 = 1.7847 R12 = -51.282 d12 = 0.8 N 8 = 1.6935 R13 = 44.944 d13 = 27.82 R14 = -14.903 d14 = 0.8 N 9 = 1.6935 R15 = 12.107 d15 = 1.64 N10 = 1.7847 R16 = 81.633 d16 = 9.631 R17 = 337.268 d17 = 2.4 N11 = 1.5163 R18 = -23.627 d18 = 0.2 R19 = 39.093 d19 = 2.4 N12 = 1.5163 R20 = -49.963 d20 = 1.0 R21 = -21.115 d21 = 1.0 N13 = 1.7400 R22 = -30.626 d22 = 3.5 R23 = 1.793 d23 = 3.0 N14 = 1.5163 R24 = -74.349 d24 = 1.2 R25 = -41.667 d25 = 1.0 N15 = 1.7495 R26 = 31.223 d26 = 5.0 R27 = 25.214 d27 = 1.0 N16 = 1.7408 R28 = 16.851 d28 = 1.25 R29 = 27.647 d29 = 3.0 N17 = 1.5163 R30 = -21.801 d30 = 0.2 R31 = 20.282 d31 = 2.4 N18 = 1.5163 R32 = -25.006 d32 = 1.0 N19 = 1.7440 R33 = 182.273 where R with a numerical subscript indicates the radius of curvature of a surface identified by the subscript; d with a numerical subscript indicates the thickness of a lens or the distance of the air space along the optical axis identified by the subscript; and N with a numerical subscript indicates the refractive index of a lens element identified by the subscript and numbered consecutively from the front to the rear being measured with the d-line of helium.