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    • 123. 发明专利
    • Zoom lens
    • 变焦镜头
    • JP2012173733A
    • 2012-09-10
    • JP2011039074
    • 2011-02-24
    • Tamron Co Ltd株式会社タムロン
    • HAYASHI TOSHIHIDE
    • G02B15/16G02B13/18
    • PROBLEM TO BE SOLVED: To provide a zoom lens that has a large aperture ratio and high variable power ratio despite its small, simple configuration and able to maintain satisfactory optical performance in the entire variable power area and the overall distance of an object from a wide angel end to a telephoto end.SOLUTION: This zoom lens comprises, in order from the object side: a first lens group Gof positive refractive power; a second lens group Gof negative refractive power; a third lens group Gof positive refractive power, and a fourth lens group Gof positive refractive power. Both sides of a positive lens Lcomposing the third lens group Gare aspherical. The imaging face IMG side face of a positive lens Lcomposing the fourth lens group Gis aspherical. Power is varied from a wide angle end to a telephoto end by moving the second lens group Gfrom the object side to the imaging face IMG side along an optical axis. A change in the imaging face resulting from varying power is corrected by moving the fourth lens group Galong the optical axis.
    • 要解决的问题:为了提供一种具有大的开口率和高可变功率比的变焦透镜,尽管它的结构小,结构简单,并且能够在整个可变功率区域和物体的总距离上保持令人满意的光学性能 从宽天使端到望远端。 解决方案:该变焦透镜从物体侧依次包括正屈光力的第一透镜组G 11 具有负屈光力的第二透镜组G 12 正屈光力的第三透镜组G 13 ,正屈光力的第四透镜组G 14 。 构成第三透镜组G 13 的正透镜L 131 的两侧都是非球面的。 构成第四透镜组G 14 的正透镜L 142 的成像面IMG侧面是非球面的。 通过沿着光轴将第二透镜组G 12 从物体侧移动到成像面IMG侧,从广角端到远摄端的功率变化。 通过沿光轴移动第四透镜组G 14 来校正由变化的功率产生的成像面的变化。 版权所有(C)2012,JPO&INPIT
    • 126. 发明专利
    • Curvature variable power optical system
    • 曲率变化功率光学系统
    • JP2012145631A
    • 2012-08-02
    • JP2011001927
    • 2011-01-07
    • Tamron Co Ltd株式会社タムロン
    • SATO SETSU
    • G02B15/16G02B13/18
    • G02B15/173G02B5/04
    • PROBLEM TO BE SOLVED: To provide a curvature variable power optical system which is hard to be affected by temperature variation, thin, small, and has high optical performance.SOLUTION: A curvature variable power optical system is constituted by arranging: a first lens group 1 having positive refractive power; a second lens group having negative refractive power; a third lens group 3 having the positive refractive power; and a fourth lens group 4 having the positive refractive power in order from the object side. The first lens group 1 is constituted by arranging: a negative meniscus lens Lwhose convex surface is turned to the object side; a prism Pfor bending an optical path; a planoconvex lens L; and a biconvex lens Lin order from the object side. In addition, the third lens group 3 is constituted by including an aperture diaphragm ST. A meniscus lens Lwhose concave surface is turned to the side of an image surface IMG is further arranged closest to the side of the image surface IMG in the fourth lens group 4.
    • 要解决的问题:提供难以受温度变化影响的曲率可变功率光学系统,薄而小,并且具有高的光学性能。 解决方案:曲率可变功率光学系统通过布置:具有正折射光焦度的第一透镜组1; 具有负屈光力的第二透镜组; 具有正屈光力的第三透镜组3; 以及从物体侧起依次具有正折光力的第四透镜组4。 第一透镜组1通过布置:凸面朝向物体侧的负弯月形透镜L 1 构成; 用于弯曲光路的棱镜P 1 平凸透镜L 2 ; 和双凸透镜L 3 。 此外,第三透镜​​组3由包括孔径光阑ST构成。 其凹面转向图像面IMG的一侧的弯月透镜L 10 进一步布置成最靠近第四透镜组4中的图像表面IMG的侧面。 P>版权所有(C)2012,JPO&INPIT
    • 129. 发明专利
    • Fisheye lens system and fisheye zoom lens system
    • FISHEYE镜头系统和FISHEYE ZOOM镜头系统
    • JP2012123412A
    • 2012-06-28
    • JP2012026180
    • 2012-02-09
    • Pentax Ricoh Imaging Co Ltdペンタックスリコーイメージング株式会社
    • ITO TAKAYUKIHIRAKAWA JUN
    • G02B15/16
    • PROBLEM TO BE SOLVED: To provide a fisheye lens system and a fisheye zoom lens system for a digital camera, configured in a small size while having a back focus of about the same degree as that of a 35 mm film camera, and having favorably compensated various aberrations including chromatic aberration of magnification.SOLUTION: The fisheye zoom lens system includes in order from an object side, a first lens group of negative power and a second lens group of positive power which are divided at a position of the maximum air interval at a short focal length extremity, and the interval between the first lens group and the second lens group reduces during variation of magnification from the short focal length extremity to a long focal length extremity. In the fisheye zoom lens system, the first lens group has in order from an object side, a first negative meniscus lens convex on the object side, a second negative meniscus lens convex on the object side, and a third negative lens, and satisfies a conditional expression relating to the shaping factor of each of the negative lenses.
    • 要解决的问题:提供一种用于数码相机的鱼眼镜头系统和鱼眼变焦镜头系统,其配置为具有与35mm胶片相机大致相同程度的后焦距的小尺寸,以及 有利地补偿了包括色像差的各种像差。 解决方案:鱼眼变焦透镜系统包括从物体侧起的负功率的第一透镜组和正功率的第二透镜组,其在短焦距末端处的最大空气间隔的位置处被划分 并且第一透镜组和第二透镜组之间的间隔在从短焦距末端到长焦距末端的放大变化期间减小。 在鱼眼变焦透镜系统中,第一透镜组从物体侧起,物体侧凸起的第一负弯月形透镜,物体侧凸起的第二负弯月形透镜和第三负透镜,并且满足 与每个负透镜的成形因子相关的条件表达式。 版权所有(C)2012,JPO&INPIT
    • 130. 发明专利
    • Zoom lens system
    • 变焦镜头系统
    • JP2012123165A
    • 2012-06-28
    • JP2010273448
    • 2010-12-08
    • Hoya CorpHoya株式会社
    • HAYAKAWA KOICHIRO
    • G02B15/16G02B13/18G02B15/167
    • G02B15/177G02B13/007G02B13/009
    • PROBLEM TO BE SOLVED: To provide a small-size and high-performance zoom lens having a variable power ratio of substantially 2.8-3.0 and capable of widening a viewing angle.SOLUTION: A zoom lens system, in order from an object side, includes: a first lens group having a negative refractive power; a second lens group having a positive refractive power; and a third lens group having a positive refractive power. When zooming from a short focal length end toward a long focal length end, a lens group interval between the first lens group and the second lens group becomes reduced, and the lens group interval between the second lens group and the third lens group becomes reduced. In the zoom lens system, a reflection prism having a negative refractive power is located between the third lens group and an image surface, and satisfies the following conditional expression: (1) P2νd
    • 要解决的问题:提供具有大致2.8-3.0的可变功率比的能够扩大视角的小尺寸和高性能的变焦镜头。 解决方案:从物体侧开始,变焦透镜系统包括:具有负折光力的第一透镜组; 具有正屈光力的第二透镜组; 以及具有正屈光力的第三透镜组。 当从短焦距端朝向​​长焦距端部变焦时,第一透镜组和第二透镜组之间的透镜组间隔变小,并且第二透镜组和第三透镜组之间的透镜组间隔变小。 在变焦透镜系统中,具有负折光力的反射棱镜位于第三透镜组和像面之间,满足以下条件式:(1)P2νd<32,其中,P2dd是反射棱镜的阿贝数 位于第三透镜组和图像表面之间,相对于d线。 版权所有(C)2012,JPO&INPIT