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公开(公告)号：US11726290B2
公开(公告)日：2023-08-15
申请号：US17076673
申请日：2020-10-21
Applicant: LARGAN PRECISION CO., LTD.
Inventor： Yu Chen Lai , Ming-Ta Chou , Cheng-Feng Lin
Abstract: An imaging lens system has an optical axis and an image surface through which the optical axis passes. The imaging lens system includes a plastic lens barrel surrounding the optical axis. The plastic lens barrel includes an image-side portion and an object-side aperture through which the optical axis passes, and the image-side portion is located between the image surface and the object-side aperture. The image-side portion includes a protrusive structure surrounding the optical axis and extending towards the image surface. The protrusive structure has an inner surface facing the optical axis, an outer surface disposed opposite to the inner surface and located farther away from the optical axis than the inner surface and a reflection-reducing surface extending towards the image surface and connected to and located between the inner surface and the outer surface. The protrusive structure includes a reflection-reducing structure disposed on the reflection-reducing surface.
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公开(公告)号：US11686917B2
公开(公告)日：2023-06-27
申请号：US17848495
申请日：2022-06-24
Applicant: LARGAN PRECISION CO., LTD.
Inventor： Ming-Ta Chou , Hsiang-Chi Tang , Tzu-Chieh Kuo
CPC classification number: G02B7/025 , G02B1/041 , G02B7/021 , G02B7/022 , G02B9/64 , G02B13/006 , G02B13/0045
Abstract: A plastic lens assembly includes at least two plastic lens elements and at least one cementing glue coating. The plastic lens elements include a first plastic lens element and a second plastic lens element. The first plastic lens element has a first optical effective portion and a first peripheral portion, wherein the first peripheral portion surrounds the first optical effective portion. The second plastic lens element has a second optical effective portion and a second peripheral portion, wherein the second peripheral portion surrounds the second optical effective portion. The cementing glue coating is disposed between the first optical effective portion and the second optical effective portion, and for cementing the first plastic lens element and the second plastic lens element, wherein at least one optical gap is formed between the first optical effective portion and the second optical effective portion.
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公开(公告)号：US11662540B2
公开(公告)日：2023-05-30
申请号：US17518900
申请日：2021-11-04
Applicant: LARGAN PRECISION CO., LTD.
Inventor： Lin An Chang , Ming-Ta Chou , Chun-Hua Tsai
Abstract: An imaging lens module includes an imaging lens assembly, an image sensor and a plastic lens barrel. The image sensor is disposed on an image side of the imaging lens assembly and has an image sensing surface through which an optical axis of the imaging lens assembly passes. The plastic lens barrel includes an object-end portion, a bottom portion, a first inner hole portion and a second inner hole portion. An object-end surface of the object-end portion faces towards an object side direction of the imaging lens assembly. A tapered surface of the object-end portion is tapered off towards the object-end surface. The bottom portion is located on an image side of the object-end portion. The imaging lens assembly is disposed in the first inner hole portion. The second inner hole portion located on an image side of the first inner hole portion and includes an optical aligning structure.
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公开(公告)号：US11573400B2
公开(公告)日：2023-02-07
申请号：US16686125
申请日：2019-11-16
Applicant: LARGAN PRECISION CO.,LTD.
Inventor： Ming-Shun Chang , Heng Yi Su , Ming-Ta Chou
Abstract: An imaging lens system includes a plastic lens element. The plastic lens element includes an optical effective portion and an outer ring portion. The optical axis passes through the optical effective portion. The outer ring portion surrounds the optical effective portion and includes an annular groove structure, a conical surface, a flat abutting portion and a full-circle connecting portion. The annular groove structure is tapered off. Each of the conical surface and the flat abutting portion is located closer to the optical effective portion than the annular groove structure. The flat abutting portion is in physical contact with an optical element. The full-circle connecting portion is connected to the annular groove structure and located farther away from the optical effective portion than the annular groove structure. The annular groove structure has an annular bottom end surface extending in a direction substantially perpendicular to the optical axis.
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55.发明授权公开(公告)号：US11506873B2
公开(公告)日：2022-11-22
申请号：US16924444
申请日：2020-07-09
Applicant: LARGAN PRECISION CO., LTD.
Inventor： Ming-Ta Chou
Abstract: An optical lens assembly includes at least one lens element, which is a dual molded lens element. The dual molded lens element includes a light transmitting portion and a light absorbing portion. The light absorbing portion is annular and surrounds a central axis, wherein a plastic material and a color of the light absorbing portion are different from a plastic material and a color of the light transmitting portion, the dual molded lens element is made by an injection molding method and formed integrally, the light absorbing portion includes a plurality of second inner strip-shaped structures, the second inner strip-shaped structures are regularly arranged along a circumferential direction of the central axis, and the second inner strip-shaped structures are disposed correspondingly to and connected to a plurality of first inner strip-shaped structures.
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Patent Agency Ranking
公开(公告)号：US11360288B2
公开(公告)日：2022-06-14
申请号：US16846601
申请日：2020-04-13
Applicant: LARGAN PRECISION CO., LTD.
Inventor： Cheng-Feng Lin , Ming-Ta Chou
Abstract: An imaging lens set includes three plastic lens elements, which are a first lens element, a second lens element and a third lens element, and a light blocking sheet. The first lens element includes a first flat abutting portion and a first conical surface. The second lens element includes a second flat abutting portion, a second conical surface, a fourth flat abutting portion and a fourth conical surface. The third lens element includes a third flat abutting portion and a third conical surface. The first flat abutting portion is abutted with the second flat abutting portion, the first conical surface contacts with the second conical surface, and the third conical surface contacts with the fourth conical surface. The light blocking sheet is abutted with the third flat abutting portion and the fourth flat abutting portion, respectively.
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公开(公告)号：US11353676B2
公开(公告)日：2022-06-07
申请号：US16942964
申请日：2020-07-30
Applicant: LARGAN PRECISION CO., LTD.
Inventor： Jyun-Jia Cheng , Heng-Yi Su , Ming-Ta Chou , Ming-Shun Chang
Abstract: An imaging lens assembly includes a plastic barrel and an optical element set. The optical element set includes an optical lens element, a light blocking sheet and a light-shielding layer. At least one surface of an object-side peripheral surface and an image-side peripheral surface of the optical lens element includes an annular side wall. An annular abutting surface of the light blocking sheet and the annular side wall of the optical lens element are disposed correspondingly to each other. The light-shielding layer surrounds a central opening of the light blocking sheet and includes an annular concave-curved portion. The annular concave-curved portion is for retaining the light blocking sheet, so that there is no relative displacement in a direction parallel to an optical axis between the annular abutting surface of the light blocking sheet and the annular side wall of the optical lens element.
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公开(公告)号：US11249275B2
公开(公告)日：2022-02-15
申请号：US16655485
申请日：2019-10-17
Applicant: LARGAN PRECISION CO., LTD.
Inventor： Ming-Shun Chang , Ming-Ta Chou , Wei-Hung Weng
IPC: G02B7/02
Abstract: A plastic lens barrel includes an object-end portion, an image-end portion and a tube portion. The object-end portion has an object-end outer surface, an object-end opening and an object-end inner surface, wherein one end of the object-end inner surface is connected to the object-end outer surface and surrounds the object-end opening. The image-end portion has an image-end outer surface and an image-end opening. The tube portion connected object-end portion and the image-end portion, and includes a plurality of tube inner surfaces. At least one of the tube inner surfaces and the object-end inner surface includes a plurality of annular convex structures. Each of the annular convex structures surrounds a central axis of the plastic lens barrel. A cross-sectional plane of each annular convex structure passing through the central axis includes a peak point and two valley point.
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公开(公告)号：US11237361B2
公开(公告)日：2022-02-01
申请号：US16505926
申请日：2019-07-09
Applicant: LARGAN PRECISION CO., LTD.
Inventor： Ming-Ta Chou , Ruei-Yang Luo
Abstract: An imaging lens assembly includes lens elements, a metal spacing structure and at least one blocking sheet. At least one lens element is a plastic lens element. The metal spacing structure is for maintaining the plastic lens element in a space between two sides thereof and two of the lens elements adjacent thereto, respectively. The metal spacing structure includes, in order from an object side to an image side, a first spacing ring having a first through hole and a second spacing ring having a second through hole, wherein the second through hole is larger than the first through hole. At least one of the first spacing ring and the second spacing ring is made of metal material. The blocking sheet is disposed between two of the lens elements, and is not disposed between the first spacing ring and the second spacing ring.
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公开(公告)号：US11199677B2
公开(公告)日：2021-12-14
申请号：US16853117
申请日：2020-04-20
Applicant: LARGAN PRECISION CO., LTD.
Inventor： Lin An Chang , Ming-Ta Chou , Chun-Hua Tsai
Abstract: An imaging lens module includes an imaging lens assembly, an image sensor and a plastic lens barrel. The image sensor is disposed on an image side of the imaging lens assembly and has an image sensing surface through which an optical axis of the imaging lens assembly passes. The plastic lens barrel includes an object-end portion, a bottom portion, a first inner hole portion and a second inner hole portion. An object-end surface of the object-end portion faces towards an object side direction of the imaging lens assembly. A tapered surface of the object-end portion is tapered off towards the object-end surface. The bottom portion is located on an image side of the object-end portion. The imaging lens assembly is disposed in the first inner hole portion. The second inner hole portion located on an image side of the first inner hole portion and includes an optical aligning structure.
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