Imaging lens system
AssigneeHon Hai Precision Industry Co., Ltd.
InventorsKuo-Yen Liang, Chun-Hsiang Huang
Life of this patent
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Abstract
An imaging lens system, in order from the object side to the image side thereof, includes a first lens with positive refractive power, a second lens with positive refractive power, a third lens with negative refractive power and an image sensing element. The imaging lens system satisfies the following formulas: L/TTL>1.23, and 0.3<G1R1/F1<0.4, where an active surface of the image sensing element is square and only includes effective pixels, and L is the length of one side of the active surface, image sensing element TTL is the distance along an optical axis thereof from the object-side lens surface of the first lens to an imaging plane of the image side, G1R1 is the radius of curvature of the object-side lens surface of the first lens, and F1 is the focal length of the first lens.
Claims11
An imaging lens system, in order from the object side to the image side, comprising a first lens with positive refractive power, a second lens with positive refractive power, a third lens with negative refractive power and a image sensing element, the imaging lens system satisfying the following formulas:
- L/TTL>1.23, 0.3<G1R1/F1<0.4, where an active surface of the image sensing element is square and only includes effective pixels, and L is the length of one side of the active surface, image sensing element TTL is the distance along an optical axis thereof from the object-side lens surface of the first lens to an imaging plane, G1R1 is the radius of curvature of the object-side lens surface of the first lens, and the F1 is the focal length of the first lens.
Dependencies are inferred from the claim text.