Patents by Inventor Yoshiaki Kurioka
Yoshiaki Kurioka 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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Publication number: 20100171849Abstract: A zoom lens system, in order from an object side to an image side, comprising a first lens unit of positive power, a second lens unit of negative power, a third lens unit of positive power, and a fourth lens unit of positive power, wherein the first lens unit is composed of three or fewer lens elements, wherein the second lens unit is composed of three lens elements, wherein in zooming, the first to the fourth lens units are moved individually along an optical axis such that air spaces should vary, so that variable magnification is achieved, and wherein the conditions are satisfied: tan 2?W×m2W??1.78, tan 2?W×|fG2|/fG1?1.24, ?W?37 and fT/fW?10 (m2W is a lateral magnification of the second lens unit at a wide-angle limit, fG1 and fG2 are composite focal lengths of the first and the second lens units, ?W is a half view angle at a wide-angle limit, and fT and fW are focal lengths of the entire system respectively at a telephoto limit and at a wide-angle limit), an imaging device and a camera are provided.Type: ApplicationFiled: January 5, 2010Publication date: July 8, 2010Applicant: PANASONIC CORPORATIONInventors: Yasunori Tohchi, Yoshiaki Kurioka, Takakazu Bito
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Publication number: 20100172031Abstract: A zoom lens system, in order from an object side to an image side, comprising a first lens unit of positive power, a second lens unit of negative power, a third lens unit of positive power, and a fourth lens unit of positive power, wherein the first lens unit is composed of three or fewer lens elements, wherein the second lens unit is composed of three lens elements, wherein in zooming, the first to the fourth lens units are moved individually along an optical axis such that air spaces should vary, so that variable magnification is achieved, and wherein the conditions are satisfied: 2.00?D/fW?4.68, ?W?35 and fT/fW?10 (D is a total of an optical axial thickness of each lens unit, ?W is a half view angle at a wide-angle limit, and fT and fW are focal lengths of the entire system respectively at a telephoto limit and at a wide-angle limit), an imaging device and a camera are provided.Type: ApplicationFiled: January 5, 2010Publication date: July 8, 2010Applicant: PANASONIC CORPORATIONInventors: Yasunori Tohchi, Yoshiaki Kurioka, Takakazu Bito
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Patent number: 7675689Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein in zooming from a wide-angle limit to a telephoto limit, the lens units move respectively along an optical axis in such a manner that an interval between the first lens unit and the second lens unit decreases while an interval between the second lens unit and the third lens unit changes so that variable magnification is achieved, the first lens unit comprises one object side negative lens element and one image side positive lens element with a convex surface facing the object side, which have an aspheric surface, and the conditions: n12>1.88 and ?12<26 (n12 and ?12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit) are satisfied.Type: GrantFiled: May 30, 2008Date of Patent: March 9, 2010Assignee: Panasonic CorporationInventors: Yoshiaki Kurioka, Keiki Yoshitsugu, Kyoichi Miyazaki
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Patent number: 7639429Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein in zooming from a wide-angle limit to a telephoto limit, the lens units move respectively along an optical axis in such a manner that an interval between the first lens unit and the second lens unit decreases while an interval between the second lens unit and the third lens unit changes so that variable magnification is achieved, the first lens unit comprises one object side negative lens element and one image side positive lens element with a convex surface facing the object side, which have an aspheric surface, and the conditions: n12>1.88 and ?12<26 (n12 and ?12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit) are satisfied.Type: GrantFiled: May 30, 2008Date of Patent: December 29, 2009Assignee: Panasonic CorporationInventors: Yoshiaki Kurioka, Keiki Yoshitsugu, Kyoichi Miyazaki
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Patent number: 7633685Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein in zooming from a wide-angle limit to a telephoto limit, the lens units move respectively along an optical axis in such a manner that an interval between the first lens unit and the second lens unit decreases while an interval between the second lens unit and the third lens unit changes so that variable magnification is achieved, the first lens unit comprises one object side negative lens element and one image side positive lens element with a convex surface facing the object side, which have an aspheric surface, and the conditions: n 12>1.88 and ? 12<26 (n12 and ?12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit) are satisfied.Type: GrantFiled: May 30, 2008Date of Patent: December 15, 2009Assignee: Panasonic CorporationInventors: Yoshiaki Kurioka, Keiki Yoshitsugu, Kyoichi Miyazaki
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Patent number: 7630140Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein in zooming from a wide-angle limit to a telephoto limit, the lens units move respectively along an optical axis in such a manner that an interval between the first lens unit and the second lens unit decreases while an interval between the second lens unit and the third lens unit changes so that variable magnification is achieved, the first lens unit comprises one object side negative lens element and one image side positive lens element with a convex surface facing the object side, which have an aspheric surface, and the conditions: n12>1.88 and ?12<26 (n12 and ?12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit) are satisfied.Type: GrantFiled: May 30, 2008Date of Patent: December 8, 2009Assignee: Panasonic CorporationInventors: Yoshiaki Kurioka, Keiki Yoshitsugu, Kyoichi Miyazaki
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Patent number: 7599126Abstract: A zoom lens system comprising a first lens unit of negative power, a second lens unit of positive power and a third lens unit of positive power, wherein in zooming, the lens units move respectively along an optical axis so that an interval of first lens unit and second lens unit decreases while an interval of second lens unit and third lens unit changes with variable magnification, the first lens unit comprises one object side negative lens element and one image side positive lens element, which have an aspheric surface, and the conditions: n12>1. 88, v12<26 and 5.0<?iW<20.0 (?W>30, n12 and v12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit, ?i W is an incident angle of the principal ray onto the image sensor at the maximum image height at a wide-angle limit) are satisfied.Type: GrantFiled: March 1, 2007Date of Patent: October 6, 2009Assignee: Panasonic CorporationInventor: Yoshiaki Kurioka
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Patent number: 7570435Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein in zooming from a wide-angle limit to a telephoto limit, the lens units move respectively along an optical axis in such a manner that an interval between the first lens unit and the second lens unit decreases while an interval between the second lens unit and the third lens unit changes so that variable magnification is achieved, the first lens unit comprises one object side negative lens element and one image side positive lens element with a convex surface facing the object side, which have an aspheric surface, and the conditions: n12>1.88 and ?12<26 (n12 and ?12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit) are satisfied.Type: GrantFiled: May 30, 2008Date of Patent: August 4, 2009Assignee: Panasonic CorporationInventors: Yoshiaki Kurioka, Keiki Yoshitsugu, Kyoichi Miyazaki
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Patent number: 7532409Abstract: A zoom lens system comprising a first lens unit of negative power, a second lens unit of positive power and a third lens unit of positive power, wherein in zooming, the lens units move respectively along an optical axis so that an interval of first lens unit and second lens unit decreases while an interval of second lens unit and third lens unit changes with variable magnification, the first lens unit comprises one object side negative lens element and one image side positive lens element, which have an aspheric surface, and the conditions: n12>1. 88, ?12<26 and 3.0<f3/fW<5.5 (?W>30, n12 and ?12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit, f3 is a composite focal length of the third lens unit, fW is a focal length of the entire zoom lens system at a wide-angle limit) are satisfied.Type: GrantFiled: October 31, 2007Date of Patent: May 12, 2009Assignee: Panasonic CorporationInventor: Yoshiaki Kurioka
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Publication number: 20080285147Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein in zooming from a wide-angle limit to a telephoto limit, the lens units move respectively along an optical axis in such a manner that an interval between the first lens unit and the second lens unit decreases while an interval between the second lens unit and the third lens unit changes so that variable magnification is achieved, the first lens unit comprises one object side negative lens element and one image side positive lens element with a convex surface facing the object side, which have an aspheric surface, and the conditions: n12>1.88 and ?12<26 (n12 and ?12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit) are satisfied.Type: ApplicationFiled: May 30, 2008Publication date: November 20, 2008Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yoshiaki Kurioka, Keiki Yoshitsugu, Kyoichi Miyazaki
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Publication number: 20080285149Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein in zooming from a wide-angle limit to a telephoto limit, the lens units move respectively along an optical axis in such a manner that an interval between the first lens unit and the second lens unit decreases while an interval between the second lens unit and the third lens unit changes so that variable magnification is achieved, the first lens unit comprises one object side negative lens element and one image side positive lens element with a convex surface facing the object side, which have an aspheric surface, and the conditions: n12>1.88 and ?12<26 (n12 and ?12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit) are satisfied.Type: ApplicationFiled: May 30, 2008Publication date: November 20, 2008Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yoshiaki Kurioka, Keiki Yoshitsugu, Kyoichi Miyazaki
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Publication number: 20080285148Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein in zooming from a wide-angle limit to a telephoto limit, the lens units move respectively along an optical axis in such a manner that an interval between the first lens unit and the second lens unit decreases while an interval between the second lens unit and the third lens unit changes so that variable magnification is achieved, the first lens unit comprises one object side negative lens element and one image side positive lens element with a convex surface facing the object side, which have an aspheric surface, and the conditions: n 12>1. 88 and ? 12<26 (n12 and ?12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit) are satisfied.Type: ApplicationFiled: May 30, 2008Publication date: November 20, 2008Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yoshiaki Kurioka, Keiki Yoshitsugu, Kyoichi Miyazaki
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Patent number: 7453648Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein in zooming from a wide-angle limit to a telephoto limit, the lens units move respectively along an optical axis in such a manner that an interval between the first lens unit and the second lens unit decreases while an interval between the second lens unit and the third lens unit changes so that variable magnification is achieved, the first lens unit comprises one object side negative lens element and one image side positive lens element with a convex surface facing the object side, which have an aspheric surface, and the conditions: n12>1.88 and ?12<26 (n12 and ?12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit) are satisfied.Type: GrantFiled: November 29, 2006Date of Patent: November 18, 2008Assignee: Panasonic CorporationInventors: Yoshiaki Kurioka, Keiki Yoshitsugu, Kyoichi Miyazaki
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Publication number: 20080247057Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein in zooming from a wide-angle limit to a telephoto limit, the lens units move respectively along an optical axis in such a manner that an interval between the first lens unit and the second lens unit decreases while an interval between the second lens unit and the third lens unit changes so that variable magnification is achieved, the first lens unit comprises one object side negative lens element and one image side positive lens element with a convex surface facing the object side, which have an aspheric surface, and the conditions: n12>1.88 and ?12<26 (n12 and ?12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit) are satisfied.Type: ApplicationFiled: May 30, 2008Publication date: October 9, 2008Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yoshiaki Kurioka, Keiki Yoshitsugu, Kyoichi Miyazaki
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Publication number: 20080247056Abstract: A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein in zooming from a wide-angle limit to a telephoto limit, the lens units move respectively along an optical axis in such a manner that an interval between the first lens unit and the second lens unit decreases while an interval between the second lens unit and the third lens unit changes so that variable magnification is achieved, the first lens unit comprises one object side negative lens element and one image side positive lens element with a convex surface facing the object side, which have an aspheric surface, and the conditions: n12>1.88 and ?12<26 (n12 and ?12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit) are satisfied.Type: ApplicationFiled: May 30, 2008Publication date: October 9, 2008Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yoshiaki Kurioka, Keiki Yoshitsugu, Kyoichi Miyazaki
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Publication number: 20080130132Abstract: A zoom lens system comprising a first lens unit of negative power, a second lens unit of positive power and a third lens unit of positive power, wherein in zooming, the lens units move respectively along an optical axis so that an interval of first lens unit and second lens unit decreases while an interval of second lens unit and third lens unit changes with variable magnification, the first lens unit comprises one object side negative lens element and one image side positive lens element, which have an aspheric surface, and the conditions: n12>1.88, ?12<26 and 3.0<f3/fW<5.5 (?W>30, n12 and ?12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit, f3 is a composite focal length of the third lens unit, fW is a focal length of the entire zoom lens system at a wide-angle limit) are satisfied.Type: ApplicationFiled: October 31, 2007Publication date: June 5, 2008Applicant: Matsushita Electric Industrial Co., Ltd.Inventor: Yoshiaki Kurioka
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Patent number: 7374291Abstract: An image display apparatus is provided, which includes a first image display element corresponding to a first color light, a second display element corresponding to a second color light different from the first color light, and a projection optical system having at least one reflective surface and projecting image lights from the first and second display elements onto a projection plane.Type: GrantFiled: May 27, 2005Date of Patent: May 20, 2008Assignee: Canon Kabushiki KaishaInventor: Yoshiaki Kurioka
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Patent number: 7310191Abstract: A zoom lens system comprising a first lens unit of negative power, a second lens unit of positive power and a third lens unit of positive power, wherein in zooming, the lens units move respectively along an optical axis so that an interval of first lens unit and second lens unit decreases while an interval of second lens unit and third lens unit changes with variable magnification, the first lens unit comprises one object side negative lens element and one image side positive lens element, which have an aspheric surface, and the conditions: n12>1.88, ?12<26 and 3.0<f3/fW<5.5 (?W>30, n12 and ?12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit, f3 is a composite focal length of the third lens unit, fW is a focal length of the entire zoom lens system at a wide-angle limit) are satisfied.Type: GrantFiled: March 1, 2007Date of Patent: December 18, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Yoshiaki Kurioka
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Publication number: 20070217025Abstract: A zoom lens system comprising a first lens unit of negative power, a second lens unit of positive power and a third lens unit of positive power, wherein in zooming, the lens units move respectively along an optical axis so that an interval of first lens unit and second lens unit decreases while an interval of second lens unit and third lens unit changes with variable magnification, the first lens unit comprises one object side negative lens element and one image side positive lens element, which have an aspheric surface, and the conditions: n12>1.88, ?12<26 and 3.0<f3/fW<5.5 (?W>30, n12 and ?12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit, f3 is a composite focal length of the third lens unit, fW is a focal length of the entire zoom lens system at a wide-angle limit) are satisfied.Type: ApplicationFiled: March 1, 2007Publication date: September 20, 2007Inventor: Yoshiaki Kurioka
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Publication number: 20070211350Abstract: A zoom lens system comprising a first lens unit of negative power, a second lens unit of positive power and a third lens unit of positive power, wherein in zooming, the lens units move respectively along an optical axis so that an interval of first lens unit and second lens unit decreases while an interval of second lens unit and third lens unit changes with variable magnification, the first lens unit comprises one object side negative lens element and one image side positive lens element, which have an aspheric surface, and the conditions: n 12>1. 88, ?12<26 and 5.0<?iW<20.0 (?W>30, n12 and ?12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit, ?i W is an incident angle of the principal ray onto the image sensor at the maximum image height at a wide-angle limit) are satisfied.Type: ApplicationFiled: March 1, 2007Publication date: September 13, 2007Inventor: Yoshiaki Kurioka