Patents by Inventor Hsiang Chi Tang

Hsiang Chi Tang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10416417
    Abstract: An image capturing optical lens system 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, a fifth lens element, and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element has refractive power. The third lens element with refractive power has a concave image-side surface. The fourth lens element has refractive power, and at least one surface thereof is aspheric. The fifth lens element with negative refractive power has a concave object-side surface and a convex image-side surface, and the surfaces thereof are aspheric. The sixth lens element with refractive power has a convex object-side surface, and an image-side surface changing from concave at a paraxial region thereof to convex at a peripheral region thereof, and the surfaces are aspheric.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: September 17, 2019
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Hsiang-Chi Tang, Tsung-Han Tsai, Hsin-Hsuan Huang
  • Publication number: 20190227277
    Abstract: An imaging optical lens assembly includes seven lens elements, the seventh lens elements being, 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 has negative refractive power. The seventh lens element has an image-side surface being concave in a paraxial region thereof and having a critical point in an off-axis region thereof. The image-side surface and an object-side surface of the seventh lens element are both aspheric.
    Type: Application
    Filed: July 3, 2018
    Publication date: July 25, 2019
    Inventors: HSIANG-CHI TANG, Chun-Che Hsueh, Chun-Yen Chen, Yu-Tai Tseng, Wei-Yu Chen
  • Publication number: 20190196132
    Abstract: An imaging lens assembly has an optical axis and includes a plastic barrel, a lens set and a retaining element. The plastic barrel includes a first channel and a second channel. The lens set is disposed in the plastic barrel and includes at least one adjustable lens element, wherein an outer diameter surface of the adjustable lens element includes a plurality of axial rotation structures, each of the axial rotation structures is in a protruding strip shape, and at least one of the axial rotation structures is disposed correspondingly to the second channel of the plastic barrel and exposed. The retaining element is disposed in the plastic barrel and includes an anti-releasing structure, which is disposed correspondingly to the first channel of the plastic barrel to avoid the lens set being released from the plastic barrel.
    Type: Application
    Filed: November 5, 2018
    Publication date: June 27, 2019
    Inventors: Hsiang-Chi TANG, Ming-Ta CHOU, Ruei-Yang LUO
  • Publication number: 20190187441
    Abstract: An optical imaging system includes, in order from an object side to an image side: a first lens element having positive refractive power, a second lens element having negative refractive power, a third lens element, a fourth lens element, a fifth lens element having both an object-side surface and an image-side surface being aspheric, and a sixth lens element having both an object-side surface and an image-side surface being aspheric, wherein the optical imaging system has a total of six lens elements; at least one lens element among the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, and the sixth lens element has at least one inflection point.
    Type: Application
    Filed: February 22, 2019
    Publication date: June 20, 2019
    Inventors: Hsiang-Chi Tang, Hsin-Hsuan Huang
  • Patent number: 10254516
    Abstract: An optical imaging system includes, in order from an object side to an image side: a first lens element having positive refractive power, a second lens element having negative refractive power, a third lens element, a fourth lens element, a fifth lens element having both an object-side surface and an image-side surface being aspheric, and a sixth lens element having both an object-side surface and an image-side surface being aspheric, wherein the optical imaging system has a total of six lens elements; at least one lens element among the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, and the sixth lens element has at least one inflection point.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: April 9, 2019
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Hsiang-Chi Tang, Hsin-Hsuan Huang
  • Publication number: 20190033556
    Abstract: An imaging lens 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. The sixth lens element has an image-side surface being concave in a paraxial region thereof. The image-side surface of the sixth lens element has at least one inflection point.
    Type: Application
    Filed: January 3, 2018
    Publication date: January 31, 2019
    Inventors: Hsiang-Chi TANG, Cheng-Chen LIN, Chun-Yen CHEN, Hsin-Hsuan HUANG
  • Patent number: 10191252
    Abstract: A photographing optical lens system includes at least six lens elements, wherein the photographing optical lens system includes at least one cemented lens group cemented by two of the lens elements adjacent to each other. The at least one cemented lens group includes, in order from an object side to an image side, a first cemented lens element, a cemented layer and a second cemented lens element. The first cemented lens element has a cemented image-side surface being aspheric. The cemented layer has a cemented object-side surface and a cemented image-side surface. The second cemented lens element has a cemented object-side surface being aspheric. An aspheric coefficient of the cemented image-side surface of the first cemented lens element is different from an aspheric coefficient of the cemented object-side surface of the second cemented lens element. One of the lens elements closest to an imaged object has positive refractive power.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: January 29, 2019
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Hsiang-Chi Tang, Wei-Yu Chen
  • Publication number: 20190025600
    Abstract: An imaging lens assembly includes a plastic barrel and an imaging lens set. The plastic barrel includes an object-side aperture and a first annular surface. The imaging lens set includes a plurality of optical elements, wherein at least one of the optical elements is a plastic lens element, and the plastic lens element includes an effective optical portion, a peripheral portion, a second annular surface, and an object-side connecting surface. The peripheral portion is formed around the effective optical portion. The second annular surface is formed on an object-side surface of the plastic lens element and surrounds the effective optical portion. The object-side connecting surface is formed on the object-side surface of the plastic lens element and surrounds the effective optical portion, and the object-side connecting surface is connected with one of the optical elements disposed on an object side of the plastic lens element.
    Type: Application
    Filed: March 15, 2018
    Publication date: January 24, 2019
    Inventors: Hsiang-Chi TANG, Cheng-Chen LIN, Ming-Ta CHOU
  • Patent number: 10175456
    Abstract: The present disclosure provides an imaging lens assembly including, in order from an object side to an image side: a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof; a second lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof; a third lens element; a fourth lens element; a fifth lens element having an object-side surface being concave in a paraxial region thereof, both of the object-side surface and an image-side surface thereof being aspheric; and a sixth lens element having an object-side surface and an image-side surface being both aspheric. The imaging lens assembly has a total of six lens elements.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: January 8, 2019
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Chien-Hsun Wu, Hsiang Chi Tang, Wei-Yu Chen
  • Publication number: 20190004285
    Abstract: An imaging 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, 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 and an image-side surface being concave in a paraxial region thereof. The seventh lens element has an image-side surface being concave in a paraxial region thereof. The image-side surface of the seventh lens element has at least one convex shape in an off-axis region thereof. An object-side surface and the image-side surface of the seventh lens element are aspheric. At least one of an image-side surface of the fourth lens element and an image-side surface of the fifth lens element has at least one inflection point.
    Type: Application
    Filed: November 17, 2017
    Publication date: January 3, 2019
    Inventors: Hsiang-Chi TANG, Cheng-Chen LIN, Chun-Yen CHEN, Yu-Tai TSENG, Wei-Yu CHEN
  • Publication number: 20180329176
    Abstract: A photographing optical lens assembly includes five lens elements with refractive power, in order from an object side to an image side. The first lens element with refractive power has a convex object-side surface. The second lens element with positive refractive power has an object-side surface and an image-side surface both being aspheric. The third lens element has positive refractive power. The fourth lens element with refractive power has a concave object-side surface. The fifth lens element with refractive power has an object-side surface and a concave image-side surface with at least one inflection point, both the object-side surface and the image-side surface being aspheric.
    Type: Application
    Filed: July 5, 2018
    Publication date: November 15, 2018
    Applicant: LARGAN PRECISION CO.,LTD.
    Inventors: Hsiang-Chi TANG, Ming-Ta CHOU
  • Publication number: 20180292630
    Abstract: An image capturing optical lens system 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, a fifth lens element, and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element has refractive power. The third lens element with refractive power has a concave image-side surface. The fourth lens element has refractive power, and at least one surface thereof is aspheric. The fifth lens element with negative refractive power has a concave object-side surface and a convex image-side surface, and the surfaces thereof are aspheric. The sixth lens element with refractive power has a convex object-side surface, and an image-side surface changing from concave at a paraxial region thereof to convex at a peripheral region thereof, and the surfaces are aspheric.
    Type: Application
    Filed: June 13, 2018
    Publication date: October 11, 2018
    Inventors: Hsiang-Chi TANG, Tsung-Han TSAI, Hsin-Hsuan HUANG
  • Publication number: 20180231743
    Abstract: An optical imaging system includes, in order from an object side to an image side: a first lens element having positive refractive power, a second lens element having negative refractive power, a third lens element, a fourth lens element, a fifth lens element having both an object-side surface and an image-side surface being aspheric, and a sixth lens element having both an object-side surface and an image-side surface being aspheric, wherein the optical imaging system has a total of six lens elements; at least one lens element among the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, and the sixth lens element has at least one inflection point.
    Type: Application
    Filed: April 13, 2018
    Publication date: August 16, 2018
    Inventors: Hsiang-Chi Tang, Hsin-Hsuan Huang
  • Patent number: 10042141
    Abstract: A photographing optical lens assembly includes five lens elements with refractive power, in order from an object side to an image side. The first lens element with refractive power has a convex object-side surface. The second lens element with positive refractive power has an object-side surface and an image-side surface both being aspheric. The third lens element has positive refractive power. The fourth lens element with refractive power has a concave object-side surface. The fifth lens element with refractive power has an object-side surface and a concave image-side surface with at least one inflection point, both the object-side surface and the image-side surface being aspheric.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: August 7, 2018
    Assignee: LARGAN Precision Co., Ltd.
    Inventors: Hsiang-Chi Tang, Ming-Ta Chou
  • Patent number: 10018809
    Abstract: An image capturing optical lens system 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, a fifth lens element, and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element has refractive power. The third lens element with refractive power has a concave image-side surface. The fourth lens element has refractive power, and at least one surface thereof is aspheric. The fifth lens element with negative refractive power has a concave object-side surface and a convex image-side surface, and the surfaces thereof are aspheric. The sixth lens element with refractive power has a convex object-side surface, and an image-side surface changing from concave at a paraxial region thereof to convex at a peripheral region thereof, and the surfaces are aspheric.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: July 10, 2018
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Hsiang-Chi Tang, Tsung-Han Tsai, Hsin-Hsuan Huang
  • Patent number: 9977224
    Abstract: An optical imaging system includes, in order from an object side to an image side: a first lens element having positive refractive power, a second lens element having negative refractive power, a third lens element, a fourth lens element, a fifth lens element having both an object-side surface and an image-side surface being aspheric, and a sixth lens element having both an object-side surface and an image-side surface being aspheric, wherein the optical imaging system has a total of six lens elements; at least one lens element among the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, and the sixth lens element has at least one inflection point.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: May 22, 2018
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Hsiang-Chi Tang, Hsin-Hsuan Huang
  • Publication number: 20180129017
    Abstract: A plastic optical lens assembly includes a first lens element, a second lens element and a cementing glue coating. A first spacing section is located between a first optical effective portion and a first engaging structure. A second optical effective portion is disposed correspondingly to the first optical effective portion. A second spacing section is located between the second optical effective portion and a second engaging structure. The first engaging structure is engaged with the second engaging structure. A reference space is between the first and the second spacing section. The cementing glue coating is at least disposed between the first and the second optical effective portions, and the first and the second lens elements are cemented by the cementing glue coating.
    Type: Application
    Filed: March 22, 2017
    Publication date: May 10, 2018
    Inventors: Hsuan-Chin HUANG, Hsiang-Chi TANG, Ming-Ta CHOU
  • Publication number: 20180106984
    Abstract: A photographing optical lens system includes at least six lens elements, wherein the photographing optical lens system includes at least one cemented lens group cemented by two of the lens elements adjacent to each other. The at least one cemented lens group includes, in order from an object side to an image side, a first cemented lens element, a cemented layer and a second cemented lens element. The first cemented lens element has a cemented image-side surface being aspheric. The cemented layer has a cemented object-side surface and a cemented image-side surface. The second cemented lens element has a cemented object-side surface being aspheric. An aspheric coefficient of the cemented image-side surface of the first cemented lens element is different from an aspheric coefficient of the cemented object-side surface of the second cemented lens element. One of the lens elements closest to an imaged object has positive refractive power.
    Type: Application
    Filed: March 17, 2017
    Publication date: April 19, 2018
    Inventors: Hsiang-Chi TANG, Wei-Yu CHEN
  • Publication number: 20180052303
    Abstract: An optical imaging system includes, in order from an object side to an image side: a first lens element having positive refractive power, a second lens element having negative refractive power, a third lens element, a fourth lens element, a fifth lens element having both an object-side surface and an image-side surface being aspheric, and a sixth lens element having both an object-side surface and an image-side surface being aspheric, wherein the optical imaging system has a total of six lens elements; at least one lens element among the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, and the sixth lens element has at least one inflection point.
    Type: Application
    Filed: November 30, 2016
    Publication date: February 22, 2018
    Inventors: HSIANG-CHI TANG, Hsin-Hsuan Huang
  • Publication number: 20180052304
    Abstract: The present disclosure provides an imaging lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof; a second lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof; a third lens element; a fourth lens element; a fifth lens element having an object-side surface being concave in a paraxial region thereof, both of the object-side surface and an image-side surface thereof being aspheric; and a sixth lens element having an object-side surface and an image-side surface being both aspheric. The imaging lens assembly has a total of six lens elements.
    Type: Application
    Filed: December 13, 2016
    Publication date: February 22, 2018
    Inventors: Chien-Hsun Wu, Hsiang Chi Tang, Wei-Yu Chen