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    • 155. 发明专利
    • Zoom lens and optical device mounted with the same
    • 变焦镜头和光学装置安装在同一个镜头上
    • JP2011227240A
    • 2011-11-10
    • JP2010095809
    • 2010-04-19
    • Canon Incキヤノン株式会社
    • SHINOHARA KENJI
    • G02B15/16G02B13/18
    • G02B15/173
    • PROBLEM TO BE SOLVED: To provide a zoom lens which has a wide field angle and high optical performance over the whole zoom range and is compact as a whole system.SOLUTION: A zoom lens comprises, in order from an object side to an image side, a first lens group having positive reflective power, a second lens group having negative reflective power, a third lens group having positive reflective power, and a forth lens group having positive reflective power. The zoom lens performs zooming by moving the second and the forth lens groups, and the third lens group has at least positive and negative lenses at least one for each. When the curvature radii of an object side surface and an image side surface of one of the negative lens in the second lens group are expressed by Rnf and Rnr respectively and the curvature radii of an object side surface and an image side surface of one of the positive lens in the second lens group are expressed by Rpf and Rpr respectively, the following conditional formula is satisfied, 3.4
    • 要解决的问题:提供一种在整个变焦范围内具有宽场角和高光学性能的变焦镜头,并且作为整体系统是紧凑的。 解决方案:变焦透镜从物体侧到像侧依次包括具有正反射光焦度的第一透镜组,具有负反射光焦度的第二透镜组,具有正反射光焦度的第三透镜组,以及 具有正反射功率的第三透镜组。 变焦透镜通过移动第二和第四透镜组进行变焦,并且第三透镜组具有至少一个至少正的和负的透镜。 当第二透镜组中的负透镜的物体侧表面和像侧表面的曲率半径分别由Rnf和Rnr表示,并且其中的一个的物体侧表面和像侧表面的曲率半径 第二透镜组中的正透镜分别由Rpf和Rpr表示,满足以下条件式:3.4 <(Rnf-Rnr)/(Rnf + Rnr)<4.4-0.7 <(Rpf-Rpr)/(Rpf + Rpr )< - 0.5。 版权所有(C)2012,JPO&INPIT
    • 156. 发明专利
    • Zoom lens and imaging apparatus
    • 变焦镜头和成像装置
    • JP2011221126A
    • 2011-11-04
    • JP2010087646
    • 2010-04-06
    • Sony Corpソニー株式会社
    • KURODA DAISUKE
    • G02B15/16G02B13/18G02B15/15
    • PROBLEM TO BE SOLVED: To achieve miniaturization while securing high performance.SOLUTION: At the time of zooming, the overall length of a zoom lens remains unchanged. A first lens group G1 which is fixed in the optical axis direction at the time of zooming, at least one lens group movable in the optical axis direction, and an imaging surface fixed in the optical axis direction are arranged in order from the object side to the image side. An optical distance varying mechanism T for varying an optical distance is positioned between the first lens group and the imaging surface and the optical distance varying mechanism is composed of a first prism V and a second prism W. The first prism has an incident surface v1 perpendicular to the optical axis and an emission surface v2 inclined relative to the incident surface and the second prism has the emission surface perpendicular to the optical axis and an incident surface w2 positioned facing the emission surface of the first prism inclined at the same angle as the emission surface of the first prism relative to the emission surface w1. The first prism and the second prism are configured to be moved synchronously in the direction of coming into contact with each other in the inclining direction of the emission surface and the incident surface.
    • 要解决的问题:在确保高性能的同时实现小型化。 解决方案:变焦时,变焦镜头的整体长度保持不变。 在变焦时在光轴方向上固定的第一透镜组G1,从光轴方向移动的至少一个透镜组和沿光轴方向固定的摄像面依次从物体侧到 图像侧。 用于改变光学距离的光学距离变化机构T位于第一透镜组和成像表面之间,光学距离变化机构由第一棱镜V和第二棱镜W组成。第一棱镜具有入射表面v1垂直 并且相对于入射表面倾斜的发射表面v2和第二棱镜具有垂直于光轴的发射表面,并且面向第一棱镜的发射表面定位的入射表面w2以与发射相同的角度倾斜 第一棱镜相对于发射表面w1的表面。 第一棱镜和第二棱镜构造成沿着发射表面和入射表面的倾斜方向彼此接触的方向同步地移动。 版权所有(C)2012,JPO&INPIT
    • 158. 发明专利
    • Zoom lens
    • 变焦镜头
    • JP2011203418A
    • 2011-10-13
    • JP2010069589
    • 2010-03-25
    • Panasonic Corpパナソニック株式会社
    • ZAITSU KEIICHI
    • G02B15/16G02B13/18G03B5/00
    • PROBLEM TO BE SOLVED: To provide a zoom lens system, having a zoom ratio of ≥1.87 times at the photographing distance of ∞, having a field angle of ≥67° at a wide angle end, having high resolution and a short optical overall length, and capable of correcting image-blurring.SOLUTION: A zoom lens comprises: a first lens group of negative power; and a second lens group of positive power wherein a diaphragm is secured in an inside. The first lens group comprises a first negative lens L1 and a second positive lens L2. Either surface of the second lens L2 is aspherical, wherein a local curvature radius monotonously increases/decreases as it is farther away from the center. The second lens group comprises a third positive lens, a fourth positive lens, a fifth negative lens and a sixth positive lens. The object-side surface and the image-side surface of the sixth lens are aspherical, wherein the local curvature radius monotonously increases/decreases as it is farther away from the center. In zooming from the wide angle end to the telephoto end at the photographing distance of ∞, the first lens group draws a convex track on an image surface side, and the second lens group G2 monotonously moves to an object side.
    • 要解决的问题:为了提供一种变焦透镜系统,其在∞的拍摄距离处具有≥1.87倍的变焦比,在广角端具有≥67°的场角,具有高分辨率和短的光学总长度 并且能够校正图像模糊。解决方案:变焦镜头包括:负功率的第一透镜组; 以及其中隔膜固定在内部的正功率的第二透镜组。 第一透镜组包括第一负透镜L1和第二正透镜L2。 第二透镜L2的任何一个表面是非球面,其中局部曲率半径随着离中心越远单调地增大/减小。 第二透镜组包括第三正透镜,第四正透镜,第五负透镜和第六正透镜。 第六透镜的物体侧表面和像侧表面是非球面的,其中局部曲率半径随着离中心越远单调地增大/减小。 在∞的拍摄距离处从广角端到望远端的变焦时,第一透镜组在图像表面侧绘制凸形轨迹,并且第二透镜组G2单调地移动到物体侧。
    • 160. 发明专利
    • Optical system and optical apparatus
    • 光学系统和光学设备
    • JP2011191743A
    • 2011-09-29
    • JP2011019771
    • 2011-02-01
    • Canon Incキヤノン株式会社
    • ISHIBASHI TOMOHIKO
    • G02B13/02G02B13/18G02B15/16
    • G02B15/173G02B15/16G02B15/22
    • PROBLEM TO BE SOLVED: To provide an optical system capable of correcting aberration variations which vary with movement of a lens unit. SOLUTION: The optical system includes: a positive first lens unit L1 and a negative second lens unit L2, each of which is a lens unit that is arranged in order from an object side to an image side and in which a distance therebetween is changed by zooming or focusing; and an aperture diaphragm SP disposed on the image side from the second lens unit. The first lens unit includes a first optical element that satisfies ϕGH>0.0, νdGH 1.70. The optical system satisfies 0.65 2 ¾ COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供能够校正随着透镜单元的移动而变化的像差变化的光学系统。 解决方案:光学系统包括:正的第一透镜单元L1和负的第二透镜单元L2,每个透镜单元是从物体侧到像侧依次布置的透镜单元,并且其中之间的距离 通过变焦或聚焦改变; 以及从第二透镜单元设置在像侧的孔径光阑SP。 第一透镜单元包括满足φGH> 0.0,νdGH<39.5和ndGH> 1.70的第一光学元件。 光学系统满足0.65 <¾φ2/φ1¾<6.0,0.45 <¾ΣφGH×φ2/φ1 2 ¾<4.00。 这里,φGH是第一光学元件的光入射侧面和发光侧面都与空气接触时的第一光学元件的屈光力; 相对于形成第一光学元件的材料的d射线,νdGH和ndGH分别是阿贝数和折射率; φ1和φ2分别是第一透镜单元的屈光力和第二透镜单元的折光力; ΣφGH是第一光学元件的屈光度φGH的总和。 版权所有(C)2011,JPO&INPIT