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    • 113. 发明专利
    • Zoom lens and imaging apparatus using the same
    • 使用它的变焦镜头和成像装置
    • JP2012255898A
    • 2012-12-27
    • JP2011128573
    • 2011-06-08
    • Olympus Corpオリンパス株式会社
    • MIHARA SHINICHIOTA TATSU
    • G02B15/16G02B13/18
    • PROBLEM TO BE SOLVED: To provide a compact zoom lens which is bright, has a wide angle of view, has high variable power, and has satisfactorily corrected aberrations.SOLUTION: In the zoom lens has, in order from an object side, a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, and a positive final lens group, the first lens group is fixed, the second lens group is moved to the image surface side, the third lens group is fixed, and the fourth lens group is moved in varying magnification from a wide angle end to a telephoto end, and the fourth lens group is moved in focusing, and the fourth lens group comprises: in order from the object side, a lens component having positive refractive power and a lens component having negative refractive power, and the following conditional expression is satisfied: -0.3
    • 要解决的问题:为了提供一种明亮的,具有宽视角的小型变焦透镜,具有高可变功率,并且具有令人满意的校正像差。 解决方案:在变焦透镜中,从物体侧开始,具有正的第一透镜组,负的第二透镜组,正的第三透镜组,正的第四透镜组和正的最终透镜组, 第一透镜组被固定,第二透镜组移动到图像表面侧,第三透镜​​组被固定,并且第四透镜组从广角端到望远端以变化的倍率移动,并且第四透镜组 并且第四透镜组包括:从物体侧开始具有正折光力的透镜部件和具有负折光力的透镜部件,并满足以下条件表达式:-0.3 <(R42F-R42R )/(R42F + R42R)<0.6。 在该表达式中,R42F表示最靠近具有第四透镜组的负折光力的透镜部件的物体的表面上的近轴曲率半径,并且R42R表示最接近第一透镜组的一侧的表面上的近轴曲率半径 具有第四透镜组的负折光力的透镜部件的图像。 版权所有(C)2013,JPO&INPIT
    • 119. 发明专利
    • Zoom lens, imaging apparatus, and method for manufacturing zoom lens
    • 变焦镜头,成像装置和制造变焦镜头的方法
    • JP2012220680A
    • 2012-11-12
    • JP2011085599
    • 2011-04-07
    • Nikon Corp株式会社ニコン
    • TANAKA KAZUMASASATO HARUO
    • G02B15/16G02B1/11G02B1/111G02B13/18
    • PROBLEM TO BE SOLVED: To provide a compact zoom lens favorably correcting various aberrations, reducing ghost and flare, and having a high imaging performance and a wide angle field, an imaging apparatus, and a method for manufacturing zoom lenses.SOLUTION: The zoom lens includes, in order from an object side, a front group Gn having negative refractive power, and a rear group Gp having positive refractive power. The front group includes, in order from the object side: an aspherical lens component Ga having the negative refractive power and having such a shape that the negative refractive power decreases towards the periphery; and an aspherical lens component Gb having the positive refractive force and having such a shape that the positive refractive power is gradually changed into the negative refractive power towards the periphery, or having the negative refractive power and having such a shape that the negative refractive force increases towards the periphery. The zoom lens varies the power by changing an air interval between the front group and the rear group, satisfies predetermined conditional expressions, and includes an antireflection film at least including a single layer formed by using a wet process on at least one surface of optical surfaces of the front group.
    • 要解决的问题:为了提供有利地校正各种像差的紧凑型变焦镜头,减少重影和闪光,以及具有高成像性能和广角视场,成像装置和用于制造变焦镜头的方法。 解决方案:变焦透镜从物体侧依次包括具有负屈光力的前组Gn和具有正屈光力的后组Gp。 前面组按照从物体侧开始的顺序包括:具有负折光力的非球面透镜组件Ga,并且具有使负折射力朝向周边减小的形状; 和具有正折射力并且具有这样的形状的非球面透镜组件Gb,使得正折射力逐渐变为朝向周边的负折光力,或具有负折光力并具有负折射力增加的形状 朝向周边。 变焦透镜通过改变前组和后组之间的空气间隔来改变功率,满足预定的条件表达式,并且包括至少包括通过使用湿法在光学表面的至少一个表面上形成的单层的抗反射膜 的前组。 版权所有(C)2013,JPO&INPIT