| 发明名称 | Photographing optical lens system, image capturing unit and electronic device | ||
| 摘要 | A photographing optical lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element. The second lens element has positive refractive power. The eighth lens element has an image-side surface being concave in a paraxial region thereof, wherein the image-side surface of the eighth lens element has at least one convex shape in an off-axis region thereof, and both an object-side surface and the image-side surface thereof are aspheric. The photographing optical lens system has a total of eight lens elements. An air gap in a paraxial region is located between every two lens elements of the photographing optical lens system that are adjacent to each other. | ||
| 申请公布号 | US9523841(B1) | 申请公布日期 | 2016.12.20 |
| 申请号 | US201514866314 | 申请日期 | 2015.09.25 |
| 申请人 | LARGAN PRECISION CO., LTD. | 发明人 | Chen Wei-Yu |
| 分类号 | G02B9/64;G02B13/00;G02B1/04 | 主分类号 | G02B9/64 |
| 代理机构 | Maschoff Brennan | 代理人 | Maschoff Brennan |
| 主权项 | 1. A photographing optical lens system comprising, in order from an object side to an image side: a first lens element; a second lens element having positive refractive power; a third lens element; a fourth lens element; a fifth lens element; a sixth lens element; a seventh lens element; and an eighth lens element having an image-side surface being concave in a paraxial region thereof, wherein the image-side of the eighth lens element has at least one convex shape in an off-axis region thereof, and both an object-side surface and the image-side surface of the eighth lens element are aspheric; wherein the photographing optical lens system has a total of eight lens elements; there is an air gap in a paraxial region between every two of the lens elements that are adjacent to each other; wherein an axial distance between an object-side surface of the first lens element and the image-side surface of the eighth lens element is Td, a focal length of the photographing optical lens system is f, a vertical distance between a non-axial critical point on the image-side surface of the eighth lens element and an optical axis is Yc82, and the following conditions are satisfied: Td/f<2.0; and0.10<Yc82/f<0.80. | ||
| 地址 | Taichung TW | ||