Camera optical lens
AssigneeChangzhou Raytech Optronics Co., Ltd.
InventorWen Sun
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to the field of optical lenses, and discloses a camera optical lens. The camera optical lens includes eight lenses, and the eight lenses includes successively from an object side to an image side: a first lens having negative refractive power, a second lens having positive refractive power, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. An object side surface of the eighth lens is a convex surface at a paraxial position, an image side surface thereof is a concave surface at a paraxial position, and at least one of the first lens to the eighth lens includes a free-form surface. The camera optical lens of the present disclosure has good optical performance while meeting design requirements of a large aperture, ultra-thinness, and a wide angle while.
Claims9
An camera optical lens, comprising from an object side to an image side:
- a first lens having negative refractive power;
- a second lens having positive refractive power;
- a third lens;
- a fourth lens;
- a fifth lens having negative refractive power;
- a sixth lens having negative refractive power;
- a seventh lens;
- and
- an eighth lens,
- wherein an object side surface of the second lens is a convex surface at a paraxial position, and image side surface of the second lens is a concave surface at the paraxial position, an object side surface of the eighth lens is a convex surface at a paraxial position, an image side surface of the eighth lens is a concave surface at the paraxial position, and at least one of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens comprises a free-form surface, wherein the camera optical lens further satisfies:
- 2.10≤f2/f≤11.74;
- −14.09≤(R3+R4)/(R3−R4)≤−2.21;
- and
- 0.02≤d3/TTL≤0.10,
- where
- f denotes a total focal length of the camera optical lens,
- f2 denotes a focal length of the second lens,
- R3 denotes a central curvature radius of an object side surface of the second lens,
- R4 denotes a central curvature radius of an image side surface of the second lens,
- d3 denotes an on-axis thickness of the second lens, and
- TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
Dependencies are inferred from the claim text.