Patents Assigned to Largan Precision Co., Ltd.
  • Publication number: 20220390815
    Abstract: An optical imaging lens assembly having a zooming function includes, in order from an object side to an image side along an optical path: a reflection group and a lens group. The reflection group includes a prism having an object-side surface being convex. The prism includes a reflection surface configured to reflect an imaging light passing through the object-side surface of the prism and send the imaging light to an image-side surface of the prism. The lens group includes at least three lens elements arranged along the optical path, and each of the at least three lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The lens group includes a movable group, and the movable group moves along a direction parallel to an optical axis in a zooming process.
    Type: Application
    Filed: May 27, 2022
    Publication date: December 8, 2022
    Applicant: LARGAN PRECISION CO., LTD.
    Inventors: Po-Lun HSU, Tzu-Chieh KUO
  • Patent number: 11520123
    Abstract: An optical photographing assembly includes, in order from an object side to an image side along an optical axis, 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 at least one of an object-side surface and an image-side surface being aspheric. The fourth lens element has at least one of an object-side surface and an image-side surface being aspheric. The fifth lens element has at least one of an object-side surface and an image-side surface being aspheric, wherein at least one of the object-side surface and the image-side surface of the fifth lens element includes at least one inflection point.
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: December 6, 2022
    Assignee: LARGAN PRECISION CO., LTD.
    Inventor: Chun-Yen Chen
  • Publication number: 20220382018
    Abstract: An imaging optical lens system includes eight 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, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element. The first lens element has positive refractive power. The second lens element has negative refractive power. The seventh lens element has an image-side surface being concave in a paraxial region thereof, and the image-side surface of the seventh lens element has at least one convex critical point in an off-axis region thereof.
    Type: Application
    Filed: October 20, 2021
    Publication date: December 1, 2022
    Applicant: LARGAN PRECISION CO., LTD.
    Inventors: Kuan-Ting YEH, Wei-Yu CHEN
  • Patent number: 11513318
    Abstract: An optical photographing lens assembly includes, in order from an object side to an image side, 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 with positive refractive power 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 second lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The third lens element has two surfaces being both aspheric. The fourth lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof, wherein two surfaces thereof are aspheric. The fifth lens element has an image-side surface being convex in a paraxial region thereof, wherein two surfaces thereof are aspheric.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: November 29, 2022
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Dung-Yi Hsieh, Chun-Yen Chen, Chun-Che Hsueh, Hsin-Hsuan Huang
  • Publication number: 20220373775
    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.
    Type: Application
    Filed: August 4, 2022
    Publication date: November 24, 2022
    Applicant: LARGAN PRECISION CO., LTD.
    Inventors: Cheng-Feng LIN, Lin An CHANG, Ming-Ta CHOU
  • Patent number: 11506867
    Abstract: An image capturing optical assembly includes, in order from an object side to an image side, a first lens group, a second lens group and a third lens group, wherein the first lens group includes a first lens element and a second lens element, the second lens group includes a third lens element, a fourth lens element and a fifth lens element, and the third lens group includes a sixth lens element, a seventh lens element and an eighth lens element. At least one surface of at least one of the lens elements of each lens group is aspheric. At least one surface of at least one of the lens elements includes at least one inflection point.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: November 22, 2022
    Assignee: LARGAN PRECISION CO., LTD.
    Inventor: Hsin-Hsuan Huang
  • Patent number: 11506873
    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.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: November 22, 2022
    Assignee: LARGAN PRECISION CO., LTD.
    Inventor: Ming-Ta Chou
  • Patent number: 11506872
    Abstract: An imaging lens assembly includes six lens elements, which are, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The sixth lens element has negative refractive power. At least one surface of an object-side surface and an image-side surface of at least one lens element of the six lens elements is aspheric.
    Type: Grant
    Filed: August 17, 2020
    Date of Patent: November 22, 2022
    Assignee: LARGAN PRECISION CO., LTD.
    Inventor: Hsin-Hsuan Huang
  • Publication number: 20220365254
    Abstract: An imaging lens system includes a lens element and an aperture element surrounding an imaging optical path and forming an aperture. The aperture element includes a first conical surface, a second conical surface and a contact surface. The first and second conical surfaces surround the imaging optical path. The contact surface is perpendicular to the imaging optical path and contacts the lens element. When the imaging lens system is in a first environment condition, the first conical surface is in contact with the lens element, the second conical surface is spaced apart from the lens element, and the aperture is aligned with the optically effective region. When the imaging lens system is in a second environment condition, the second conical surface is in contact with the lens element, the first conical surface is spaced apart from the lens element, and the aperture is aligned with the optically effective region.
    Type: Application
    Filed: July 7, 2021
    Publication date: November 17, 2022
    Applicant: LARGAN PRECISION CO., LTD.
    Inventors: Chun-Hua TSAI, Yu Chen LAI, Ming-Ta CHOU
  • Patent number: 11500173
    Abstract: An imaging lens module includes a plastic lens barrel, a first optical element assembly and a second optical element assembly, wherein both of the first optical element assembly and the second optical element assembly are disposed in the plastic lens barrel. The plastic lens barrel includes a first inner annular surface and a second inner annular surface. The first inner annular surface forms a first receiving space. The second inner annular surface forms a second receiving space. The first optical element assembly is disposed in the first receiving space and includes a plurality of optical lens elements and a first retainer. The second optical element assembly is disposed in the second receiving space and includes a first light blocking sheet and a second retainer.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: November 15, 2022
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Chien-Hsun Wu, Lin-An Chang, Ming-Ta Chou
  • Publication number: 20220350114
    Abstract: An optical lens system includes two lens elements which are, in order from an object side to an image side along an optical path: a first lens element and a second lens element. Each of the two lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. At least one of the object-side surface and the image-side surface of at least one lens element of the optical lens system is aspheric. A total number of the lens elements in the optical lens system is two.
    Type: Application
    Filed: September 21, 2021
    Publication date: November 3, 2022
    Applicant: LARGAN PRECISION CO., LTD.
    Inventors: Chun-Che HSUEH, Jin Sen WANG, Hsin-Hsuan HUANG, FUH-SHYANG YANG
  • Patent number: 11487089
    Abstract: An image capturing optical lens assembly includes five lens elements, in order from an object side to an image side along an optical path, being 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 with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The fourth lens element with positive refractive power has an image-side surface being convex in a paraxial region thereof. The fifth lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. At least one of surfaces of the fifth lens element includes at least one critical point in an off-axis region thereof.
    Type: Grant
    Filed: August 13, 2020
    Date of Patent: November 1, 2022
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Cheng-Chen Lin, Kuan-Chun Wang, Tzu-Chieh Kuo
  • Patent number: 11487107
    Abstract: An annular optical element includes an outer annular surface, an inner annular surface, a first side surface, a second side surface and a plurality of strip-shaped wedge structures. The outer annular surface surrounds a central axis of the annular optical element and includes at least two shrunk portions. The first side surface connects the outer annular surface and the inner annular surface. The second side surface connects the outer annular surface and the inner annular surface, wherein the second side surface is disposed correspondingly to the first side surface. The strip-shaped wedge structures are disposed on the inner annular surface, wherein each of the strip-shaped wedge structures is disposed along a direction from the first side surface towards the second side surface and includes an acute end and a tapered portion connecting the inner annular surface and the acute end.
    Type: Grant
    Filed: May 19, 2020
    Date of Patent: November 1, 2022
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Cheng-Feng Lin, Wei-Hung Weng, Ming-Ta Chou
  • Patent number: 11487088
    Abstract: An imaging lens assembly includes seven 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, a fifth lens element, a sixth lens element and a seventh lens element. Each of the seven lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The second lens element has positive refractive power. The sixth lens element has positive refractive power, and the image-side surface of the sixth lens element is convex in a paraxial region thereof. The seventh lens element has negative refractive power. At least one of the object-side surface and the image-side surface of at least one lens element of the imaging lens assembly is aspheric and has at least one inflection point.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: November 1, 2022
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Kuo-Jui Wang, Tzu-Chieh Kuo
  • Patent number: 11487091
    Abstract: A photographing lens assembly includes seven lens elements, which are, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The seventh 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 seventh lens element includes at least one convex shape in an off-axis region thereof. The object-side surface and the image-side surface of the seventh lens element are aspheric.
    Type: Grant
    Filed: October 7, 2020
    Date of Patent: November 1, 2022
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Chun-Che Hsueh, Chun-Yen Chen, Wei-Yu Chen
  • Patent number: 11489991
    Abstract: An imaging lens system includes a plastic lens element, a lens barrel and a light-absorbing coating layer. The plastic lens element is accommodated in the lens barrel and has an outer annular surface. The lens barrel includes a plate portion and a lateral wall portion. An optical axis of the imaging lens system passes through a light-passable hole of the plate portion. The lateral wall portion is connected to the plate portion and extends along a direction substantially parallel to the optical axis. The light-absorbing coating layer has an inner surface and an outer surface. The inner surface faces and is fixed on the outer annular surface of the plastic lens element. The outer surface is located opposite to the inner surface and in physical contact with the lateral portion of the lens barrel.
    Type: Grant
    Filed: May 24, 2021
    Date of Patent: November 1, 2022
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Jyun-Jia Cheng, Heng Yi Su, Ming-Ta Chou, Chen-Yi Huang
  • Patent number: 11480765
    Abstract: An imaging optical system includes six lens elements which are, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. Each of the six lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. At least one of the six lens elements is a freeform lens element, and at least one of the object-side surface and the image-side surface of the at least one freeform lens element is a freeform surface.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: October 25, 2022
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Yu Jui Lin, Cheng-Yuan Liao, Jin Sen Wang, Tzu-Chieh Kuo
  • Patent number: 11480757
    Abstract: An imaging optical system includes three lens elements. The three lens elements, in order from an object side to an image side, are a first lens element having an object-side surface facing the object side and an image-side surface facing the image side, a second lens element having an object-side surface facing the object side and an image-side surface facing the image side, and a third lens element having an object-side surface facing the object side and an image-side surface facing the image side. The third lens element has positive refractive power, the imaging optical system has a total of three lens elements, and there are air gaps between paraxial regions of the first lens element, the second lens element and the third lens element.
    Type: Grant
    Filed: January 27, 2020
    Date of Patent: October 25, 2022
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Kuan-Ming Chen, Kuan-Ting Yeh, Tzu-Chieh Kuo
  • Patent number: 11480755
    Abstract: An imaging lens module includes a plastic barrel, an optical lens assembly and a glue material. The plastic barrel includes an outer object-end surface, an outer image-end surface and an inner tube surface. The inner tube surface connects the outer object-end surface and the outer image-end surface, and includes a plurality of parallel inner surfaces. A plurality of stripe structures are disposed on and protruded from at least one of the parallel inner surfaces, wherein the stripe structures are regularly arranged along a circumferential direction of the parallel inner surface. The optical lens assembly includes a plurality of optical elements disposed in the plastic barrel and arranged along the optical axis, wherein an outer annular surface of at least one of the optical elements is disposed correspondingly to the stripe structures. The glue material is applied among the outer annular surface and the stripe structures.
    Type: Grant
    Filed: June 4, 2020
    Date of Patent: October 25, 2022
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Chun-Hua Tsai, Ming-Ta Chou, Ming-Shun Chang
  • Publication number: 20220326482
    Abstract: An optical imaging lens assembly includes eight 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, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element. The first lens element has an object-side surface being concave in a paraxial region thereof and having at least one inflection point in an off-axis region thereof. The seventh lens element has negative refractive power. The eighth lens element has an image-side surface being concave in a paraxial region thereof and having at least one inflection point in an off-axis region thereof. At least one lens surface of at least one of the second to seventh lens elements is aspheric.
    Type: Application
    Filed: April 29, 2021
    Publication date: October 13, 2022
    Applicant: LARGAN PRECISION CO., LTD.
    Inventor: Tzu-Chieh KUO