Camera lens assembly comprising four lenses of +−++, ++−+ or +−−+ regractive powers
AssigneeZhejiang Sunny Optical Co., Ltd
InventorXinquan Wang
Life of this patent
Estimating the term…
Abstract
The present disclosure discloses a camera lens assembly, the camera lens assembly having a total effective focal length f and an entrance pupil diameter EPD, and along an optical axis from an object side to an image side sequentially including a first lens, a second lens, a third lens and a fourth lens, wherein the first lens and the fourth lens have positive refractive powers, an image-side surface of the first lens is a concave surface, and an object-side surface of the fourth lens is a convex surface. In addition, the total effective focal length f and the entrance pupil diameter EPD satisfy: f/EPD≤2.
Claims10
A camera lens assembly consisting of four lenses, having a total effective focal length f and an entrance pupil diameter EPD, and the camera lens assembly sequentially comprising, along an optical axis from an object side to an image side, a first lens, a second lens, a third lens and a fourth lens,
- wherein, the first lens and the fourth lens have positive refractive powers, the second lens has a negative refractive power, an image-side surface of the first lens is a concave surface, and an object-side surface of the fourth lens is a convex surface;
- the total effective focal length f and the entrance pupil diameter EPD satisfy:
- 1.5≤f/EPD≤2;
- and
- half of a diagonal length ImgH of an effective pixel area on an image plane of the camera lens assembly satisfies:
- 0.753≤ImgH/f<0.8.
Dependencies are inferred from the claim text.