Lens system
AssigneeHon Hai Precision Industry Co., Ltd.
InventorsKUANG-JU WANG, CHUN-HSIANG HUANG
Life of this patent
Estimating the term…
Abstract
A lens system includes, in order from the object side, a positive refractive power first lens, a negative refractive power second lens, a positive refractive power third lens, and a fourth lens. Wherein the lens system satisfies the following conditions: (1) TTL/f<1.3; and (2) 0.75<f1/f<1.25, wherein, TTL is a distance from a surface of the first lens facing the object side of the lens system to the image plane, f is a focal length of the lens system, and f1 is a focal length of the first lens.
Claims20
A lens system comprising, in order from the object side:
- a positive refractive power first lens;
- a negative refractive power second lens;
- a positive refractive power third lens;
- and
- a fourth lens,
- wherein the lens system satisfies the following conditions:
- (1) TTL/f<1.3;
- (2) 0.75<f1/f<1.25, and 0.8<f3/f<1.6,
- wherein, TTL is a distance from a surface of the first lens facing the object side of the lens system to an image plane, f is a focal length of the lens system, f1 is a focal length of the first lens, and f3 is a focal length of the third lens.
(canceled)
An device with image capturing function, comprising:
- a body;
- a lens module mounted on the body, the lens module comprising, in order from the object side:
- a positive refractive power first lens;
- a negative refractive power second lens;
- a positive refractive power third lens;
- and
- a fourth lens,
- wherein the lens system satisfies the following conditions:
- (1) TTL/f<1.3;
- (2) 0.75<f1/f<1.25, and 0.8<f3/f<1.6,
- wherein, TTL is a distance from a surface of the first lens facing the object side of the lens system to a image plane, f is a focal length of the lens system, f1 is a focal length of the first lens, and f3 is a focal length of the third lens;
- and
- an image plane mounted in the body and arranged on the image side of the lens module.
(canceled)
Dependencies are inferred from the claim text.