发明名称 |
Image capturing optical system, image capturing device and electronic device |
摘要 |
The present disclosure provides an image capturing optical system comprising: a positive first lens element having a convex object-side surface; a negative second lens element having a concave object-side surface; a third lens element; a fourth lens element having a convex object-side surface and a concave image-side surface, the object-side surface and the image-side surface thereof being aspheric; a fifth lens element having a concave image-side surface concave, both of the object-side surface and the image-side surface being aspheric, at least one of the object-side surface and the image-side surface having at least one convex shape in an off-axis region thereof. |
申请公布号 |
US9341820(B2) |
申请公布日期 |
2016.05.17 |
申请号 |
US201414534986 |
申请日期 |
2014.11.06 |
申请人 |
LARGAN PRECISION CO., LTD. |
发明人 |
Chen Kuan-Ming;Chen Wei-Yu |
分类号 |
G02B13/18;G02B9/60;G02B13/00;H04N5/225 |
主分类号 |
G02B13/18 |
代理机构 |
Locke Lord LLP |
代理人 |
Locke Lord LLP ;Xia, Esq. Tim Tingkang |
主权项 |
1. An image capturing optical system comprising, in order from an object side to an image side:
a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof; a second lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof; a third lens element; a fourth lens element having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the object-side surface and the image-side surface thereof being aspheric; and a fifth lens element having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the object-side surface and the image-side surface thereof being aspheric, the image-side surface having at least one convex shape in an off-axis region thereof; wherein the image capturing optical system has a total of five lens elements with refractive power and an air gap is arranged between every two adjacent lens elements with refractive power; wherein a focal length of the second lens is f2, a focal length of the first lens element is f1, a curvature radius of the object-side surface of the second lens element is R3, and the following conditions are satisfied:
−1.0<f2/f1<0; and0<R3/f2. |
地址 |
Taichung TW |