Optical imaging lens
AssigneeGenius Electronic Optical (Xiamen) Co., Ltd.
InventorsJia-Sin Jhang, Maozong Lin, Huifeng Pan
Life of this patent
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Abstract
An optical imaging lens may include eight lens elements positioned in an order from an object side to an image side. Through designing concave and/or convex surfaces of the eight lens elements, the optical imaging lens may provide improved imaging quality and optical characteristics while the total length of the optical imaging lens may be shortened.
Claims20
An optical imaging lens comprising a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element sequentially from an object side to an image side along an optical axis, each of the first, second, third, fourth, fifth, sixth, seventh and eighth lens elements having an object-side surface facing toward the object side and allowing imaging rays to pass through as well as an image-side surface facing toward the image side and allowing the imaging rays to pass through, the optical imaging lens comprises no other lens elements having refracting power beyond the first, second, third, fourth, fifth, sixth, seventh and eighth lens elements wherein:
- an optical axis region of the image-side surface of the first lens element is concave;
- the second lens element has negative refracting power;
- a periphery region of the object-side surface of the fifth lens element is concave;
- an optical axis region of the image-side surface of the fifth lens element is convex;
- an optical axis region of the image-side surface of the sixth lens element is concave;
- an optical axis region of the image-side surface of the seventh lens element is concave;
- materials of the third lens element, the fourth lens element, and the eighth lens element are plastic;
- a distance from the object-side surface of the first lens element to the image-side surface of the eighth lens element along the optical axis is represented by TL;
- a distance from the image-side surface of the eighth lens element to an image plane along the optical axis is represented by BFL;
- and
- the optical imaging lens further satisfies an inequality:
- TL/BFL≤5.500.
An optical imaging lens comprising a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element sequentially from an object side to an image side along an optical axis, each of the first, second, third, fourth, fifth, sixth, seventh and eighth lens elements having an object-side surface facing toward the object side and allowing imaging rays to pass through as well as an image-side surface facing toward the image side and allowing the imaging rays to pass through, the optical imaging lens comprises no other lens elements having refracting power beyond the first, second, third, fourth, fifth, sixth, seventh and eighth lens elements wherein:
- the image-side surface of the first lens element is concave from an optical axis region to a periphery region without a transition point;
- the second lens element has negative refracting power;
- a periphery region of the object-side surface of the fifth lens element is concave;
- an optical axis region of the image-side surface of the fifth lens element is convex;
- an optical axis region of the image-side surface of the sixth lens element is concave;
- an optical axis region of the image-side surface of the seventh lens element is concave;
- and
- materials of the third lens element, the fourth lens element, and the eighth lens element are plastic.
Dependencies are inferred from the claim text.