公开(公告)号：US07826149B2

公开(公告)日：2010-11-02

申请号：US12344509

申请日：2008-12-27

申请人： Hsiang-Chi Tang ,  Ming-Ching Lin

发明人： Hsiang-Chi Tang ,  Ming-Ching Lin

IPC分类号： G02B3/02 ,  G02B9/34

CPC分类号： G02B15/173 ,  G02B13/22

摘要： An optical lens system for taking image comprises, in order from the object side to the image side: a first lens element with positive refractive power having a convex object-side surface; an aperture stop; a second lens element with negative refractive power; a third lens element having a convex object-side surface; and a fourth lens element with negative refractive power having a concave object-side surface, an image-side surface of the fourth lens element being aspheric and formed with inflection points. A distance from the image-side surface of the fourth lens element to an image plane along an optical axis being BFL, a total track length of the optical lens system for taking image being TTL, and they satisfy the relation: BFL/TTL>0.12. In the optical lens system for taking image, the number of lens elements with refractive power being limited to four.

摘要翻译： 用于拍摄图像的光学透镜系统包括从物体侧到图像侧的顺序：具有凸起物体侧表面的具有正折光力的第一透镜元件; 孔径光阑; 具有负屈光力的第二透镜元件; 具有凸面物侧表面的第三透镜元件; 以及具有凹面物侧的具有负屈光力的第四透镜元件，所述第四透镜元件的图像侧表面是非球面并形成有拐点。 从第四透镜元件的像侧表面到光轴的像平面的距离为BFL，拍摄图像的光学透镜系统的总轨迹长度为TTL，并且满足以下关系：BFL / TTL> 0.12 。 在用于拍摄图像的光学透镜系统中，具有折射力的透镜元件的数量被限制为四个。

公开(公告)号：US07529041B2

公开(公告)日：2009-05-05

申请号：US11858888

申请日：2007-09-20

申请人： Yeo-Chih Huang ,  Hsiang-Chi Tang

发明人： Yeo-Chih Huang ,  Hsiang-Chi Tang

IPC分类号： G02B9/14 ,  G02B3/02 ,  G02B9/00

CPC分类号： G02B13/0035 ,  G02B9/16 ,  G02B13/18

摘要： An optical lens system for taking image comprises three lens elements with refractive power, from the object side to the image side: a first lens element with positive refractive power having a convex object-side surface and a convex image-side surface, and the object-side surface being aspheric; a plastic second lens element with negative refractive power having a concave object-side surface and a convex image-side surface, and the front and image-side surfaces thereof being aspheric; a plastic third lens element with positive refractive power having a convex object-side surface and a concave image-side surface, the front and image-side surfaces thereof being aspheric; wherein an aperture stop is located between the first and second lens elements. By such arrangements, it can reduce the volume and sensitivity of the optical lens system, and furthermore can obtain higher resolution.

摘要翻译： 用于拍摄图像的光学透镜系统包括从物体侧到像侧的具有屈光力的三个透镜元件：具有凸起物体侧表面和凸形像侧表面的具有正折光力的第一透镜元件，并且该物体 侧表面为非球面; 具有负折射力的塑料第二透镜元件，具有凹面物侧表面和凸像侧表面，其正面和像侧表面是非球面的; 具有正折射力的塑料第三透镜元件，具有凸面物侧表面和凹图像侧表面，其正面和像侧表面是非球面的; 其中孔径光阑位于第一和第二透镜元件之间。 通过这样的布置，可以降低光学透镜系统的体积和灵敏度，并且还可以获得更高的分辨率。