Imaging lens system and imaging module having same
AssigneesPremier Image Technology(China) Ltd., Hon Hai Precision Industry Co., Ltd.
InventorsYUAN ZHAO, YANG-CHENG LUO
Life of this patent
Estimating the term…
Abstract
An imaging module includes an imaging lens system and an image sensor. The imaging lens system includes a first lens, a second lens, a third lens, and a fourth lens. The imaging module satisfies the formulas, 2.4<F1/TTL<3.0, −7.0<F2/TTL<−5.5, 0.95<F3/TTL<2.0, and −3.5<F4/TTL<−2.5, wherein the TTL is the distance from the object surface of the first lens to the sensing surface of the image sensor on the optical axis of the imaging lens system, the F1 is the focal length of the first lens, the F2 is the focal length of the second lens, the F3 is the focal length of the third lens, and the F4 is the focal length of the fourth lens.
Claims17
An imaging module comprising,
- an imaging lens system comprising, in the order from the object side to the image side thereof, a first lens of positive refraction power, a second lens of negative refraction power, a third lens of positive refraction power;
- and a fourth lens of negative refraction power, and
- an image sensor aligned with the imaging lens system and placed at the image side of the imaging lens system,
- wherein the imaging module satisfies the formulas:
- 2.4<F1/TTL<3.0,
- −7.0<F2/TTL<−5.5,
- 0.95<F3/TTL<2.0, and
- −3.5<F4/TTL<−2.5,
- wherein TTL is the distance from the object surface of the first lens to the sensing surface of the image sensor on the optical axis of the imaging lens system, F1 is the focal length of the first lens, F2 is the focal length of the second lens, F3 is the focal length of the third lens, and F4 is the focal length of the fourth lens.
An imaging lens system comprising, in this order from the object side to the image side thereof,
- a first lens of positive refraction power, a second lens of negative refraction power, a third lens of positive refraction power;
- and a fourth lens of negative refraction power, and
- wherein the imaging lens system satisfying the formulas:
- 2.4<F1/TTL<3.0,
- −7.0<F2/TTL<−5.5,
- 0.95<F3/TTL<2.0, and
- −3.5<F4/TTL<−2.5,
- wherein TTL is the distance from the object surface of the first lens to a sensing surface of an image sensor on the optical axis of the imaging lens system, F1 is the focal length of the first lens, F2 is the focal length of the second lens, F3 is the focal length of the third lens, and F4 is the focal length of the fourth lens.
Dependencies are inferred from the claim text.