Patents by Inventor Chun Shan Chen
Chun Shan Chen 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).
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Patent number: 8395853Abstract: An image pick-up optical system, in order from an object side to an image side, along an optical axis comprising: the first lens element with negative refractive power having a convex object-side surface and a concave image-side surface, the second lens element with positive refractive power, a bi-convex third lens element with positive refractive power, the fourth lens element with negative refractive power having a concave object-side surface, a plastic fifth lens element with positive refractive power having a convex object-side surface and at least one aspherical optical surface. Additionally, the image pick-up optical system satisfies conditions related to shorten the total length and to enhance the ability of wider field of view for use in compact cameras and mobile phones.Type: GrantFiled: August 15, 2011Date of Patent: March 12, 2013Assignee: Largan Precision Co.Inventors: Chun-Shan Chen, Ming-Ta Chou, Hsin-Hsuan Huang
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Patent number: 8395691Abstract: This invention provides an optical image-capturing lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power; a second lens element with negative refractive power; a third lens element, the object-side and image-side surfaces thereof being aspheric; and a fourth lens element having a concave image-side surface, the object-side and image-side surfaces thereof being aspheric and at least one inflection point being formed on at least one of the object-side and image-side surfaces thereof. The present lens assembly is further provided with a stop and an electronic sensor for image formation of an object. The stop is disposed between the object and the second lens element, and the electronic sensor is disposed at an image plane.Type: GrantFiled: October 26, 2010Date of Patent: March 12, 2013Assignee: Largan Precision Co., Ltd.Inventors: Hsiang Chi Tang, Dung Yi Hsieh, Chun Shan Chen, Tsung Han Tsai
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Publication number: 20130057968Abstract: An image capturing optical 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 a convex object-side surface. The second lens element with negative refractive power has a concave object-side surface and a convex image-side surface. The third lens element with refractive power has a concave object-side surface, wherein the surfaces of the third lens element are aspheric. The fourth lens element has positive refractive power, wherein two surfaces of the fourth lens element are aspheric. The fifth lens element has refractive power, wherein two surfaces of the fifth lens element are aspheric, and the fifth lens element has at least one inflection point formed on at least one surface thereof.Type: ApplicationFiled: July 10, 2012Publication date: March 7, 2013Applicant: LARGAN PRECISION CO., LTD.Inventors: Hsiang-Chi TANG, Chun-Shan CHEN, Tsung-Han TSAI, Hsin-Hsuan HUANG
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Patent number: 8390944Abstract: A photographing optical lens assembly includes, in order from an object side to an image side, a first lens element with positive refractive power having a convex object-side surface and a convex image-side surface, and a second lens element with positive refractive power having a concave object-side surface and a convex image-side surface. At least one surface of the first lens element is aspheric and two surfaces of the second lens element are aspheric. The photographing optical lens assembly can also include a stop and an image plane. By adjusting the thicknesses of the first lens element and the second lens element as well as the allocation of the stop in the photographing optical lens assembly can effectively reduce the size as well as the sensitivity of the photographing optical lens assembly while gaining superior resolution.Type: GrantFiled: June 20, 2011Date of Patent: March 5, 2013Assignee: Largan Precision Co., Ltd.Inventors: Chun-Shan Chen, Hsin-Hsuan Huang
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Patent number: 8363337Abstract: This invention provides an imaging lens assembly including five lens elements with refractive power, in order from an object side toward an image side: a first lens with positive refractive power having a convex object-side surface, a second lens with negative refractive power, a third lens having a concave object-side surface, a fourth lens with positive refractive power having an object-side surface and a convex image-side surface, and at least one of both surfaces thereof being aspheric, a fifth lens with negative refractive power having a concave image-side surface with at least one inflection point formed thereon. An aperture stop is positioned between an imaged object and the second lens. The imaging lens assembly further comprises an electronic sensor on which an object is imaged. With such arrangement, the size and the optical sensitivity of the lens assembly can be reduced. A high image resolution is also obtained.Type: GrantFiled: June 25, 2010Date of Patent: January 29, 2013Assignee: Largan Precision Co., Ltd.Inventors: Hsiang Chi Tang, Chun Shan Chen, Tsung Han Tsai
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Publication number: 20130021680Abstract: This invention provides an optical image capturing lens system comprising: a first lens element with positive refractive power having a convex object-side surface; a second lens element; a third lens element; a fourth lens element; and a fifth lens element with negative refractive power, at least one of the object-side and image-side surfaces thereof being aspheric, and at least one inflection point is formed on at least one of the object-side and image-side surfaces thereof; wherein the system at least has one front stop and one rear stop; which are positioned between an imaged object and the third lens element as well as between the third lens element and the fifth lens element, respectively. By such arrangement, photosensitivity and total track length of the system can be reduced, and the aberration and astigmatism of the system can be effectively corrected. Moreover, the focusing performance thereof can be improved.Type: ApplicationFiled: December 29, 2011Publication date: January 24, 2013Applicant: LARGAN PRECISION CO., LTD.Inventors: Chun-Shan Chen, Hsiang-Chi Tang, Po-Lun Hsu, Dung-Yi Hsieh
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Patent number: 8325269Abstract: This invention provides an image capturing lens system comprising, in order from an object side to an image side: a first lens element with negative refractive power having a concave image-side surface; a second lens element with positive refractive power having a convex image-side surface; a third lens element with positive refractive power, at least one of the two surfaces thereof being aspheric; a fourth lens element with negative refractive power, both the two surfaces thereof being aspheric; and a stop disposed between the first and third lens elements, wherein there are four lens elements with refractive power.Type: GrantFiled: May 14, 2010Date of Patent: December 4, 2012Assignee: Largan Precision Co., Ltd.Inventors: Chun Shan Chen, Tsung Han Tsai, Dung Yi Hsieh
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Publication number: 20120300315Abstract: This invention provides an image capturing lens assembly in order from an object side to an image side comprising: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with negative refractive power having a concave object-side surface; a fourth lens element having a concave object-side surface and a convex image-side surface; and a fifth lens element having a concave image-side surface, the object-side and image-side surfaces thereof being aspheric and at least one inflection point being formed on at least one of the object-side and image-side surfaces thereof. By such arrangement, it can effectively reduce the aberration as well as the total track length of the imaging lens system for obtaining higher image resolution.Type: ApplicationFiled: September 20, 2011Publication date: November 29, 2012Applicant: LARGAN PRECISION CO., LTD.Inventors: Chun-Shan Chen, Hsin-Hsuan Huang
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Patent number: 8305697Abstract: This invention provides an image capturing lens assembly in order from an object side to an image side comprising: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with negative refractive power having a concave object-side surface; a fourth lens element having a concave object-side surface and a convex image-side surface; and a fifth lens element having a concave image-side surface, the object-side and image-side surfaces thereof being aspheric and at least one inflection point being formed on at least one of the object-side and image-side surfaces thereof. By such arrangement, it can effectively reduce the aberration as well as the total track length of the imaging lens system for obtaining higher image resolution.Type: GrantFiled: September 20, 2011Date of Patent: November 6, 2012Assignee: Largan Precision Co., Ltd.Inventors: Chun-Shan Chen, Hsin-Hsuan Huang
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Patent number: 8294997Abstract: This invention provides an optical imaging lens assembly, in order from an object side toward an image side including: a first lens element with positive refractive power having a convex object-side surface, a second lens element with negative refractive power having a concave object-side surface and a concave image-side surface, a third lens element with positive refractive power having a concave object-side surface and a convex image-side surface, a fourth lens element with negative refractive power having a concave image-side surface, and the two surfaces being aspheric; wherein the optical imaging lens assembly further comprises an aperture stop disposed between an imaged object and the first lens element, and there are four lens elements with refractive power.Type: GrantFiled: September 2, 2010Date of Patent: October 23, 2012Assignee: Largan Precision Co., Ltd.Inventors: Hsiang Chi Tang, Chun Shan Chen, Hsin Hsuan Huang
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Patent number: 8274593Abstract: An optical lens system comprises, in order from an object side to an image side: the first lens element with negative refractive power having a convex object-side surface and a concave image-side surface; the second lens element with positive refractive power; the third lens element with positive refractive power having the object-side surface and the image-side surface being aspheric; the fourth lens element with negative refractive power having a concave image-side surface and at least one aspheric surface. There are four lens elements with refractive power. Such arrangements can enable a larger field of view, reduce the volume of the system, and further obtain higher resolution for the optical lens system of the present invention.Type: GrantFiled: January 8, 2011Date of Patent: September 25, 2012Assignee: Largan Precision Co., Ltd.Inventors: Chun-Shan Chen, Hsin-Hsuan Huang
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Publication number: 20120229918Abstract: An image pick-up optical system, in order from an object side to an image side, along an optical axis comprising: the first lens element with negative refractive power having a convex object-side surface and a concave image-side surface, the second lens element with positive refractive power, a bi-convex third lens element with positive refractive power, the fourth lens element with negative refractive power having a concave object-side surface, a plastic fifth lens element with positive refractive power having a convex object-side surface and at least one aspherical optical surface. Additionally, the image pick-up optical system satisfies conditions related to shorten the total length and to enhance the ability of wider field of view for use in compact cameras and mobile phones.Type: ApplicationFiled: August 15, 2011Publication date: September 13, 2012Applicant: LARGAN PRECISION CO.Inventors: Chun-Shan Chen, Ming-Ta Chou, Hsin-Hsuan Huang
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Patent number: 8233224Abstract: This invention provides an imaging lens system including, in order from an object side to an image side: a first lens with positive refractive power having a convex object-side surface; a second lens with negative refractive power; a third lens having a concave image-side surface; a fourth lens with positive refractive power; a fifth lens with negative refractive power having a concave image-side surface, at least one surface thereof having at least one inflection point; and an aperture stop disposed between an imaged object and the third lens. The on-axis spacing between the first lens and second lens is T12, the focal length of the imaging lens system is f, and they satisfy the relation: 0.5<(T12/f)×100<15.Type: GrantFiled: January 8, 2010Date of Patent: July 31, 2012Assignee: Largan Precision Co., Ltd.Inventor: Chun-Shan Chen
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Publication number: 20120188656Abstract: This invention provides an imaging lens system including, in order from an object side to an image side: a first lens with positive refractive power having a convex object-side surface; a second lens with negative refractive power; a third lens having a concave image-side surface; a fourth lens with positive refractive power; a fifth lens with negative refractive power having a concave image-side surface, at least one surface thereof having at least one inflection point; and an aperture stop disposed between an imaged object and the third lens. The on-axis spacing between the first lens and second lens is T12, the focal length of the imaging lens system is f, and they satisfy the relation: 0.5<(T12/f)×100<15.Type: ApplicationFiled: March 29, 2012Publication date: July 26, 2012Applicant: LARGAN PRECISION CO., LTD.Inventor: Chun-Shan CHEN
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Publication number: 20120182627Abstract: This invention provides an imaging lens system including, in order from an object side to an image side: a first lens with positive refractive power having a convex object-side surface; a second lens with negative refractive power; a third lens having a concave image-side surface; a fourth lens with positive refractive power; a fifth lens with negative refractive power having a concave image-side surface, at least one surface thereof having at least one inflection point; and an aperture stop disposed between an imaged object and the third lens. The on-axis spacing between the first lens and second lens is T12, the focal length of the imaging lens system is f, and they satisfy the relation: 0.5<(T12/f)×100<15.Type: ApplicationFiled: March 29, 2012Publication date: July 19, 2012Applicant: LARGAN PRECISION CO., LTD.Inventor: Chun-Shan CHEN
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Publication number: 20120176527Abstract: An optical lens system comprises, in order from an object side to an image side: the first lens element with negative refractive power having a convex object-side surface and a concave image-side surface; the second lens element with positive refractive power; the third lens element with positive refractive power having the object-side surface and the image-side surface being aspheric; the fourth lens element with negative refractive power having a concave image-side surface and at least one aspheric surface. There are four lens elements with refractive power. Such arrangements can enable a larger field of view, reduce the volume of the system, and further obtain higher resolution for the optical lens system of the present invention.Type: ApplicationFiled: January 8, 2011Publication date: July 12, 2012Inventors: Chun-Shan CHEN, Hsin-Hsuan Huang
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Publication number: 20120170139Abstract: This invention provides a photographing optical lens assembly, from an object side to an image side in order, comprising a first lens element with positive refractive power having a convex object-side surface, a second lens element with negative refractive power having a concave image-side surface, a third lens element with positive refractive power, a fourth lens element with negative refractive power having a concave image-side surface, both the two surfaces of the fourth lens thereof being aspheric. And an aperture stop is positioned between the first element and the second lens element. There are four lens elements with refractive power in the lens assembly.Type: ApplicationFiled: March 14, 2012Publication date: July 5, 2012Applicant: LARGAN PRECISION CO., LTD.Inventors: Chun Shan Chen, Hsiang Chi Tang, Tsung Han Tsai
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Publication number: 20120170138Abstract: This invention provides a photographing optical lens assembly, from an object side to an image side in order, comprising a first lens element with positive refractive power having a convex object-side surface, a second lens element with negative refractive power having a concave image-side surface, a third lens element with positive refractive power, a fourth lens element with negative refractive power having a concave image-side surface, both the two surfaces of the fourth lens thereof being aspheric. And an aperture stop is positioned between the first element and the second lens element. There are four lens elements with refractive power in the lens assembly.Type: ApplicationFiled: March 14, 2012Publication date: July 5, 2012Applicant: LARGAN PRECISION CO., LTD.Inventors: Chun Shan Chen, Hsiang Chi Tang, Tsung Han Tsai
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Publication number: 20120154931Abstract: A photographing optical lens assembly includes, in order from an object side to an image side, a first lens element with positive refractive power having a convex object-side surface and a convex image-side surface, and a second lens element with positive refractive power having a concave object-side surface and a convex image-side surface. At least one surface of the first lens element is aspheric and two surfaces of the second lens element are aspheric. The photographing optical lens assembly can also include a stop and an image plane. By adjusting the thicknesses of the first lens element and the second lens element as well as the allocation of the stop in the photographing optical lens assembly can effectively reduce the size as well as the sensitivity of the photographing optical lens assembly while gaining superior resolution.Type: ApplicationFiled: June 20, 2011Publication date: June 21, 2012Applicant: LARGAN PRECISION CO., LTD.Inventors: Chun-Shan Chen, Hsin-Hsuan Huang
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Patent number: 8199418Abstract: This invention provides a photographing optical lens assembly, from an object side to an image side in order, comprising a first lens element with positive refractive power having a convex object-side surface, a second lens element with negative refractive power having a concave image-side surface, a third lens element with positive refractive power, a fourth lens element with negative refractive power having a concave image-side surface, both the two surfaces of the fourth lens thereof being aspheric. And an aperture stop is positioned between the first element and the second lens element. There are four lens elements with refractive power in the lens assembly.Type: GrantFiled: June 25, 2010Date of Patent: June 12, 2012Assignee: Largan Precision Co., Ltd.Inventors: Chun Shan Chen, Hsiang Chi Tang, Tsung Han Tsai