Optical imaging lens including seven lenses of +−+−++− refractive powers
AssigneeGenius Electronic Optical (Xiamen) Co., Ltd.
InventorsXinming Liu, Ou Zhou, Hai Lin
Life of this patent
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Abstract
The present invention provides an optical imaging lens. The optical imaging lens comprises seven lens elements positioned in an order from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements, the optical imaging lens may shorten system length, enlarge aperture size and promote image height.
Claims18
An optical imaging lens, comprising a first element, a second element, a third element, a fourth element, a fifth lens element, a sixth lens element and a seventh lens element sequentially from an object side to an image side along an optical axis, each of the first, second, third, fourth, fifth, sixth and seventh lens element having an object-side surface facing toward the object side and allowing imaging rays to pass through and an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:
- the second lens element has negative refracting power;
- a periphery region of the object-side surface of the third lens element is concave;
- the fourth lens element has negative refracting power;
- an optical axis region of the object-side surface of the sixth lens element is convex;
- an optical axis region of the object-side surface of the seventh lens element is convex;
- and
- lens elements of the optical imaging lens consist of the seven lens elements described above;
- and
- a thickness of the fifth lens element along the optical axis is represented by T5, an image height of the optical imaging lens is represented by ImgH, a f-number of the optical imaging lens is represented by Fno, a thickness of the first lens element along the optical axis is represented by T1, a distance from the image-side surface of the fourth lens element to the object-side surface of the fifth lens element along the optical axis is represented by G45, a thickness of the second lens element along the optical axis is represented by T2, a distance from the image-side surface of the second lens element to the object-side surface of the third lens element along the optical axis is represented by G23, a thickness of the third lens element along the optical axis is represented by T3, a distance from the image-side surface of the fifth lens element to the object-side surface of the sixth lens element along the optical axis is represented by G56, a thickness of the sixth lens element along the optical axis is represented by T6, and the optical imaging lens satisfies the inequalities:
- (T5+ImgH)/Fno≥3.200 mm,T1/G45≥1.300,(T2+G23+T3)/T1≤2.400 and T5/(G56+T6)≥1.400.
Dependencies are inferred from the claim text.