公开(公告)号：US12007619B2

公开(公告)日：2024-06-11

申请号：US18217305

申请日：2023-06-30

Applicant: LARGAN PRECISION CO., LTD.

Inventor： Yu Chen Lai ,  Ming-Ta Chou ,  Cheng-Feng Lin

IPC: G02B7/02 ,  G02B13/18

CPC classification number: G02B7/021 ,  G02B13/18

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.

公开(公告)号：US11867877B2

公开(公告)日：2024-01-09

申请号：US17410947

申请日：2021-08-24

Applicant: LARGAN PRECISION CO., LTD.

Inventor： Ming-Ta Chou ,  Cheng-Feng Lin ,  Wei-Hung Weng

IPC: G02B13/00 ,  G02B3/04 ,  G02B7/02 ,  G02B27/00

CPC classification number: G02B13/002 ,  G02B3/04 ,  G02B7/026 ,  G02B27/0018 ,  G02B27/0025

Abstract: An annular light trapping component includes an inner surface, an outer surface, an object-side surface and an image-side surface. The inner surface includes multiple L-shaped annular grooves. The annular light trapping component includes multiple stripe-shaped structures in the L-shaped annular grooves. The L-shaped annular grooves include an object-side L-shaped annular groove closest to the object-side surface and an image-side L-shaped annular groove closest to the image-side surface. A bottom diameter of the image-side L-shaped annular groove is larger than a bottom diameter of the object-side L-shaped annular groove. Each L-shaped annular groove includes a first side and a second side located between the object-side surface and the image-side surface. The stripe-shaped structures are disposed on the first side or the second side. A degree of inclination between the first side and the central axis is larger than a degree of inclination between the second side and the central axis.

公开(公告)号：US11762132B2

公开(公告)日：2023-09-19

申请号：US16932928

申请日：2020-07-20

Applicant: LARGAN PRECISION CO., LTD.

Inventor： Ming-Ta Chou ,  Cheng-Feng Lin ,  Po-Lun Hsu ,  Ming-Shun Chang ,  Ming-Ching Lin

IPC: G02B7/02 ,  G02B5/00 ,  G02B13/00

CPC classification number: G02B5/003 ,  G02B7/021 ,  G02B13/0045

Abstract: An imaging lens assembly module has an optical axis, and includes at least one plastic lens element, a carrier element and a light absorbing layer. The plastic lens element, in order from a center to a peripheral region thereof, includes an optical effective portion and a peripheral portion. A side of the peripheral portion includes a plurality of step structures interposed between the side of the peripheral portion and a same side of the optical effective portion. The carrier element defines an inner space for disposing the plastic lens element, and includes a tip end minimal opening and a plurality of annular inner walls. The light absorbing layer is disposed on the peripheral portion of the plastic lens element, and the step structures and the at least one of the annular inner walls facing towards the plastic lens element.

公开(公告)号：US11442257B2

公开(公告)日：2022-09-13

申请号：US16719508

申请日：2019-12-18

Applicant: LARGAN PRECISION CO., LTD.

Inventor： Cheng-Feng Lin ,  Lin An Chang ,  Ming-Ta Chou

IPC: G03B17/17 ,  G02B17/00 ,  G02B5/20 ,  G02B5/00 ,  G02B13/02

Abstract: A camera module includes an imaging lens system, an image sensor and a plurality of light-folding elements. The imaging lens system is configured to focus imaging light onto an image surface. The image sensor is disposed on the image surface. The plurality of light-folding elements includes at least one image-side light-folding element disposed on an image side of the imaging lens system, and each of the light-folding elements is configured to fold the imaging light from an entrance optical path thereof to an exit optical path thereof. At least one light-shielding mechanism is arranged on at least one of the entrance light path and the exit light path of the at least one image-side light-folding element. The at least one light-shielding mechanism has a minimal opening, and the minimal opening surrounds the imaging light in the at least one of the entrance optical path and the exit optical path.

公开(公告)号：US11372191B2

公开(公告)日：2022-06-28

申请号：US16736018

申请日：2020-01-07

Applicant: LARGAN PRECISION CO., LTD.

Inventor： Cheng-Feng Lin ,  Ming-Ta Chou

IPC: G02B7/02 ,  G02B1/14 ,  G02B13/00 ,  G02B1/10 ,  G02B1/04

Abstract: An imaging lens assembly includes a plastic barrel and a lens set, and the lens set is disposed in the plastic barrel. The plastic barrel includes an object-side outer surface, a first inner surface and a second inner surface. The lens set has an optical axis, and includes, in order from an object side to an image side thereof, at least one plastic lens element and a spacer. A light-absorbing coating is disposed on the plastic lens element. The spacer includes an object-side connecting surface and a relative surface. When the object-side connecting surface is connected with a neighboring object-side optical element, the relative surface is out of touch with the neighboring object-side optical element. There is an overlap between the second inner surface and the relative surface along a direction parallel to the optical axis.

公开(公告)号：US11333881B2

公开(公告)日：2022-05-17

申请号：US16885352

申请日：2020-05-28

Applicant: LARGAN PRECISION CO., LTD.

Inventor： Ming-Ta Chou ,  Cheng-Feng Lin

IPC: G02B7/02 ,  G02B27/00 ,  G02B13/00 ,  G02B5/20

Abstract: An optical lens module includes a lens assembly and a plastic barrel. The lens assembly includes a plurality of lens elements and is disposed in the plastic barrel. The plastic barrel includes an object-end portion, an image-end portion, an outer tube portion, an inner tube portion and at least one reflection reduction area. The image-end portion includes an image-end opening. The inner tube portion includes a plurality of parallel inner surfaces and a plurality of inclined inner surfaces, wherein the parallel inner surfaces are parallel to the central axis, and each of the inclined inner surfaces has an angle with the central axis. The reflection reduction area is disposed on one of the inclined inner surfaces closest to the image-end opening, wherein the reflection reduction area and the plastic barrel are integrally formed by an injection molding method.

公开(公告)号：US11226465B2

公开(公告)日：2022-01-18

申请号：US16815137

申请日：2020-03-11

Applicant: LARGAN PRECISION CO., LTD.

Inventor： Cheng-Feng Lin ,  Ming-Ta Chou ,  Wei-Hung Weng

IPC: G02B7/02

Abstract: A plastic barrel includes an object-end portion, an image-end portion, a tube portion and a plurality of wedge structures. The object-end portion includes an outer object-end surface, an object-end hole and an inner annular object-end surface. The image-end portion includes an outer image-end surface, an image-end opening and an inner annular image-end surface. The tube portion connects the object-end portion and the image-end portion, and includes a plurality of inclined surfaces. The wedge structures are disposed on at least one surface of the inner annular object-end surface, the inner annular image-end surface and the inclined surfaces, wherein the wedge structures are regularly arranged around the central axis, and each of the wedge structures includes an acute end and a tapered section. The tapered section connects the surface, which the wedge structure is disposed on, and the acute end.

公开(公告)号：US11187833B2

公开(公告)日：2021-11-30

申请号：US16680568

申请日：2019-11-12

Applicant: LARGAN PRECISION CO., LTD.

Inventor： Ming-Shun Chang ,  Cheng-Feng Lin ,  Ming-Ta Chou

IPC: G02B5/02 ,  G02B7/02 ,  G02B27/62 ,  G02B13/00

Abstract: An annular optical element having an optical axis includes an outer diameter surface, an inner annular surface, an object-side surface and an image-side surface. The object-side surface includes an annular reflecting surface, an annular auxiliary surface and a connecting surface. The annular reflecting surface is inclined with the optical axis. The annular auxiliary surface is closer to the optical axis than the annular reflecting surface is to the optical axis. The connecting surface is for connecting to an optical element, wherein the connecting surface is closer to the optical axis than the annular auxiliary surface is to the optical axis. The image-side surface is located opposite to the object-side surface and includes an annular optical surface. A V-shaped groove is formed by the annular auxiliary surface and the annular reflecting surface of the object-side surface.

公开(公告)号：US11131833B2

公开(公告)日：2021-09-28

申请号：US15951103

申请日：2018-04-11

Applicant: LARGAN PRECISION CO., LTD.

Inventor： Ming-Ta Chou ,  Cheng-Feng Lin ,  Wei-Hung Weng

IPC: G02B13/00 ,  G02B3/04 ,  G02B7/02 ,  G02B27/00

Abstract: An annular optical component includes an inner surface, an outer surface, an object-side surface and an image-side surface. The inner surface includes multiple L-shaped annular grooves. The annular optical component includes multiple stripe-shaped structures disposed in the L-shaped annular grooves. The L-shaped annular grooves include an object-side L-shaped annular groove closest to the object-side surface and an image-side L-shaped annular groove closest to the image-side surface. A bottom diameter of the image-side L-shaped annular groove is larger than a bottom diameter of the object-side L-shaped annular groove. Each L-shaped annular groove includes a first side and a second side located between the object-side surface and the image-side surface. The stripe-shaped structures are disposed on the first side or the second side, and a degree of inclination between the first side and the central axis is larger than a degree of inclination between the second side and the central axis.

公开(公告)号：US10514481B2

公开(公告)日：2019-12-24

申请号：US15869385

申请日：2018-01-12

Applicant: LARGAN PRECISION CO., LTD.

Inventor： Ming-Shun Chang ,  Cheng-Feng Lin ,  Ming-Ta Chou

IPC: G02B5/02 ,  G02B7/02 ,  G02B13/00 ,  G02B27/62

Abstract: An annular optical element having an optical axis includes an outer diameter surface, an inner annular surface, an object-side surface and an image-side surface. The object-side surface includes an annular reflecting surface, an annular auxiliary surface and a connecting surface. The annular reflecting surface is inclined with the optical axis. The annular auxiliary surface is closer to the optical axis than the annular reflecting surface is to the optical axis. The connecting surface is for connecting to an optical element, wherein the connecting surface is closer to the optical axis than the annular auxiliary surface is to the optical axis. The image-side surface is located opposite to the object-side surface and includes an annular optical surface. A V-shaped groove is formed by the annular auxiliary surface and the annular reflecting surface of the object-side surface.