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    • 8. 发明授权
    • Zoom lens and image pickup apparatus equipped with same
    • 变焦镜头和配备相机的摄像设备
    • US08879162B2
    • 2014-11-04
    • US13291436
    • 2011-11-08
    • Tetsuya YanaiMayu MikiMasahiro ImamuraToshihide Nozawa
    • Tetsuya YanaiMayu MikiMasahiro ImamuraToshihide Nozawa
    • G02B15/14
    • G02B15/177
    • A zoom lens comprises, in order from its object side, a first lens unit having a negative refractive power and a second lens unit having a positive refractive power. The first lens unit comprises a first lens having a negative refractive power and a second lens having a positive refractive power. The zoom lens satisfies the following conditional expressions (1), (2), and (3): n1n≦1.70  (1), n1p≦1.70  (2), and |ν1n−ν1p≧31  (3), where n1n is the refractive index of the first lens having a negative refractive power in the first lens unit for the d-line, ν1n is the Abbe constant of the first lens having a negative refractive power in the first lens unit, n1p is the refractive index of the second lens having a positive refractive power in the first lens unit for the d-line, and ν1p is the Abbe constant of the second lens having a positive refractive power in the first lens unit.
    • 变焦透镜从其物体侧依次包括具有负折光力的第一透镜单元和具有正折光力的第二透镜单元。 第一透镜单元包括具有负折光力的第一透镜和具有正屈光力的第二透镜。 变焦透镜满足以下条件表达式(1),(2)和(3):n1n≦̸ 1.70(1),n1p≦̸ 1.70(2)和|&ngr; 1n-&ngr;1p≥31(3) 其中n1n是在第一透镜单元中用于d线的具有负折光力的第一透镜的折射率,nn是第一透镜单元中具有负折光力的第一透镜的阿贝常数,n1p是 在第一透镜单元中用于d线的具有正折光力的第二透镜的折射率和第一透镜单元中具有正屈光力的第二透镜的阿波斯常数。
    • 9. 发明申请
    • Zoom Lens and Image Pickup Apparatus Equipped with Same
    • 变焦镜头和图像拾取装置配备相同
    • US20120113312A1
    • 2012-05-10
    • US13291436
    • 2011-11-08
    • Tetsuya YanaiMayu MikiMasahiro ImamuraToshihide Nozawa
    • Tetsuya YanaiMayu MikiMasahiro ImamuraToshihide Nozawa
    • H04N5/232G02B15/14
    • G02B15/177
    • A zoom lens comprises, in order from its object side, a first lens unit having a negative refractive power and a second lens unit having a positive refractive power. The first lens unit comprises a first lens having a negative refractive power and a second lens having a positive refractive power. The zoom lens satisfies the following conditional expressions (1), (2), and (3): n1n≦1.70  (1), n1p≦1.70  (2), and |ν1n−ν1p≧31  (3), where n1n is the refractive index of the first lens having a negative refractive power in the first lens unit for the d-line, ν1n is the Abbe constant of the first lens having a negative refractive power in the first lens unit, n1p is the refractive index of the second lens having a positive refractive power in the first lens unit for the d-line, and ν1p is the Abbe constant of the second lens having a positive refractive power in the first lens unit.
    • 变焦透镜从其物体侧依次包括具有负折光力的第一透镜单元和具有正折光力的第二透镜单元。 第一透镜单元包括具有负折光力的第一透镜和具有正屈光力的第二透镜。 变焦透镜满足以下条件表达式(1),(2)和(3):n1n≦̸ 1.70(1),n1p≦̸ 1.70(2)和|&ngr; 1n-&ngr;1p≥31(3) 其中n1n是在第一透镜单元中用于d线的具有负折光力的第一透镜的折射率,nn是第一透镜单元中具有负折光力的第一透镜的阿贝常数,n1p是 在第一透镜单元中用于d线的具有正折光力的第二透镜的折射率和第一透镜单元中具有正屈光力的第二透镜的阿波斯常数。