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公开(公告)号：US20210302700A1
公开(公告)日：2021-09-30
申请号：US17038066
申请日：2020-09-30
Applicant: LARGAN PRECISION CO., LTD.
Inventor： Chung-Yu WEI , Wen-Yao YANG , Yi-Hsiang CHUANG , Tzu-Chieh KUO
Abstract: An imaging optical lens assembly includes five lens elements, which are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. Each of the five lens elements has an object-side surface towards the object side and an image-side surface towards the image side. The third lens element has positive refractive power. At least one of the object-side surface and the image-side surface of at least one of the five lens elements includes at least one critical point in an off-axis region thereof.
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公开(公告)号：US20240045180A1
公开(公告)日：2024-02-08
申请号：US18487219
申请日：2023-10-16
Applicant: LARGAN PRECISION CO., LTD.
Inventor： Chung-Yu WEI , Hung-Shuo CHEN , Kuan-Chun WANG , Wei-Yu CHEN
CPC classification number: G02B13/0045 , G02B27/0025 , G02B9/60
Abstract: An image lens assembly includes five lens elements, which are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element has positive refractive power. The third lens element has negative refractive power. The fourth lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fifth lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The image-side surface of the fifth lens element includes at least one convex critical point in an off-axis region thereof.
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公开(公告)号：US20250004254A1
公开(公告)日：2025-01-02
申请号：US18830716
申请日：2024-09-11
Applicant: LARGAN PRECISION CO., LTD.
Inventor： Chung-Yu WEI , Hung-Shuo CHEN , Kuan-Chun WANG , Wei-Yu CHEN
Abstract: An image lens assembly includes five lens elements, which are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element has positive refractive power. The third lens element has negative refractive power. The fourth lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fifth lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The image-side surface of the fifth lens element includes at least one convex critical point in an off-axis region thereof.
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公开(公告)号：US20220099944A1
公开(公告)日：2022-03-31
申请号：US17343816
申请日：2021-06-10
Applicant: LARGAN PRECISION CO., LTD.
Inventor： Chung-Yu WEI , Hung-Shuo CHEN , Kuan-Chun WANG , Wei-Yu CHEN
Abstract: An image lens assembly includes five lens elements, which are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element has positive refractive power. The third lens element has negative refractive power. The fourth lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fifth lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The image-side surface of the fifth lens element includes at least one convex critical point in an off-axis region thereof.
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