Patents by Inventor Ryoko Otomo
Ryoko Otomo 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: 10139590Abstract: Provided are an imaging lens, which has a small F number and in which various aberrations are satisfactorily corrected, and an imaging apparatus including the imaging lens. The imaging lens includes, in order from an object side: a first lens that has a biconcave shape; a second lens that is convex toward an image side and has a positive refractive power; a third lens that has a biconvex shape; a fourth lens that has a negative refractive power; a fifth lens that has a positive refractive power; and a sixth lens that has a negative refractive power. Assuming that L1f and L1r are paraxial radii of curvature of an object side surface and an image side surface of the first lens, Conditional Expression (1) is satisfied. 0.1<(L1f+L1r)/(L1f?L1r)<0.Type: GrantFiled: September 22, 2017Date of Patent: November 27, 2018Assignee: FUJIFILM CorporationInventors: Ryoko Otomo, Michio Cho
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Publication number: 20180088301Abstract: Provided are an imaging lens, which has a small F number and in which various aberrations are satisfactorily corrected, and an imaging apparatus including the imaging lens. The imaging lens includes, in order from an object side: a first lens that has a biconcave shape; a second lens that is convex toward an image side and has a positive refractive power; a third lens that has a biconvex shape; a fourth lens that has a negative refractive power; a fifth lens that has a positive refractive power; and a sixth lens that has a negative refractive power. Assuming that L1f and L1r are paraxial radii of curvature of an object side surface and an image side surface of the first lens, Conditional Expression (1) is satisfied. 0.1<(L1f+L1r)/(L1f?L1r)<0.Type: ApplicationFiled: September 22, 2017Publication date: March 29, 2018Applicant: FUJIFILM CorporationInventors: Ryoko OTOMO, Michio CHO
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Patent number: 9274313Abstract: An imaging lens is composed of a first lens having a negative meniscus shape with a convex surface on the object side, a negative second lens, a positive third lens, an aperture stop, a negative fourth lens, and a positive fifth lens disposed in order from the object side. The fourth and the fifth lens are cemented with an interface which is convex on the object side and has an aspherical shape. If the radius of curvature is taken as R9 and the focal length of the entire system is taken as f, the imaging lens satisfies a conditional expression given below: 1.0<R9/f??(1).Type: GrantFiled: July 16, 2015Date of Patent: March 1, 2016Assignee: FUJIFILM CorporationInventors: Masao Mori, Ryoko Otomo
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Patent number: 9261674Abstract: An imaging lens is composed of a first lens having a negative meniscus shape with a convex surface on the object side, a negative second lens, a positive third lens, an aperture stop, a negative fourth lens, and a positive fifth lens disposed in order from the object side. The fourth and the fifth lens are cemented with an interface which is convex on the object side and has an aspherical shape. If the radius of curvature is taken as R9 and the focal length of the entire system is taken as f, the imaging lens satisfies a conditional expression given below: 1.0<R9/f??(1).Type: GrantFiled: July 16, 2015Date of Patent: February 16, 2016Assignee: FUJIFILM CorporationInventors: Masao Mori, Ryoko Otomo
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Patent number: 9182571Abstract: An imaging lens is composed of a first lens having a negative meniscus shape with a convex surface on the object side, a negative second lens, a positive third lens, an aperture stop, a negative fourth lens, and a positive fifth lens disposed in order from the object side. The fourth and the fifth lens are cemented with an interface which is convex on the object side and has an aspherical shape. If the radius of curvature is taken as R9 and the focal length of the entire system is taken as f, the imaging lens satisfies a conditional expression given below: 1.0<R9/f??(1).Type: GrantFiled: May 9, 2014Date of Patent: November 10, 2015Assignee: FUJIFILM CORPORATIONInventors: Masao Mori, Ryoko Otomo
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Publication number: 20150316746Abstract: An imaging lens is composed of a first lens having a negative meniscus shape with a convex surface on the object side, a negative second lens, a positive third lens, an aperture stop, a negative fourth lens, and a positive fifth lens disposed in order from the object side. The fourth and the fifth lens are cemented with an interface which is convex on the object side and has an aspherical shape. If the radius of curvature is taken as R9 and the focal length of the entire system is taken as f, the imaging lens satisfies a conditional expression given below: 1.Type: ApplicationFiled: July 16, 2015Publication date: November 5, 2015Inventors: Masao MORI, Ryoko OTOMO
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Publication number: 20150316747Abstract: An imaging lens is composed of a first lens having a negative meniscus shape with a convex surface on the object side, a negative second lens, a positive third lens, an aperture stop, a negative fourth lens, and a positive fifth lens disposed in order from the object side. The fourth and the fifth lens are cemented with an interface which is convex on the object side and has an aspherical shape. If the radius of curvature is taken as R9 and the focal length of the entire system is taken as f, the imaging lens satisfies a conditional expression given below: 1.Type: ApplicationFiled: July 16, 2015Publication date: November 5, 2015Inventors: Masao MORI, Ryoko OTOMO
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Patent number: 9176304Abstract: An imaging lens substantially consists of six lenses of a negative first lens, a negative second lens, a positive third lens, a positive fourth lens, a negative fifth lens and a positive sixth lens in this order from an object side. When a curvature radius of an object-side surface of the fourth lens is R8, and a curvature radius of an image-side surface of the fourth lens is R9, and an Abbe number of the material of the third lens for d-line is ?d3, and an Abbe number of the material of the fifth lens for d-line is ?d5, the following conditional formulas (1) and (6) are satisfied: ?0.61<(R8+R9)/(R8?R9)<0.44 ??(1); and 38.1<?d3+?d5<45.1 ??(6).Type: GrantFiled: April 1, 2015Date of Patent: November 3, 2015Assignee: FUJIFILM CORPORATIONInventors: Taro Asami, Toshiaki Katsuma, Toru Ito, Masato Kondo, Ryoko Otomo
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Patent number: 9170404Abstract: An imaging lens substantially consists of six lenses of a negative first lens, a negative second lens, a positive third lens, a positive fourth lens, a negative fifth lens and a positive sixth lens in this order from an object side. When a curvature radius of an object-side surface of the fourth lens is R8, and a curvature radius of an image-side surface of the fourth lens is R9, and an Abbe number of the material of the third lens for d-line is ?d3, and an Abbe number of the material of the fifth lens for d-line is ?d5, the following conditional formulas (1) and (6) are satisfied: ?0.61<(R8+R9)/(R8?R9)<0.44??(1); and 38.1<?d3+?d5<45.1??(6).Type: GrantFiled: April 1, 2015Date of Patent: October 27, 2015Assignee: FUJIFILM CORPORATIONInventors: Taro Asami, Toshiaki Katsuma, Toru Ito, Masato Kondo, Ryoko Otomo
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Publication number: 20150205074Abstract: An imaging lens substantially consists of six lenses of a negative first lens, a negative second lens, a positive third lens, a positive fourth lens, a negative fifth lens and a positive sixth lens in this order from an object side. When a curvature radius of an object-side surface of the fourth lens is R8, and a curvature radius of an image-side surface of the fourth lens is R9, and an Abbe number of the material of the third lens for d-line is ?d3, and an Abbe number of the material of the fifth lens for d-line is ?d5, the following conditional formulas (1) and (6) are satisfied: ?0.61<(R8+R9)/(R8?R9)<0.44??(1); and 38.1<?d3+?d5<45.1??(6).Type: ApplicationFiled: April 1, 2015Publication date: July 23, 2015Inventors: Taro ASAMI, Toshiaki KATSUMA, Toru ITO, Masato KONDO, Ryoko OTOMO
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Publication number: 20150205075Abstract: An imaging lens substantially consists of six lenses of a negative first lens, a negative second lens, a positive third lens, a positive fourth lens, a negative fifth lens and a positive sixth lens in this order from an object side. When a curvature radius of an object-side surface of the fourth lens is R8, and a curvature radius of an image-side surface of the fourth lens is R9, and an Abbe number of the material of the third lens for d-line is ?d3, and an Abbe number of the material of the fifth lens for d-line is ?d5, the following conditional formulas (1) and (6) are satisfied: ?0.61<(R8+R9)/(R8?R9)<0.44 ??(1); and 38.1<?d3+?d5<45.1 ??(6).Type: ApplicationFiled: April 1, 2015Publication date: July 23, 2015Inventors: Taro ASAMI, Toshiaki KATSUMA, Toru ITO, Masato KONDO, Ryoko OTOMO
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Patent number: 9030764Abstract: An imaging lens substantially consists of six lenses of a negative first lens, a negative second lens, a positive third lens, a positive fourth lens, a negative fifth lens and a positive sixth lens in this order from an object side. When a curvature radius of an object-side surface of the fourth lens is R8, and a curvature radius of an image-side surface of the fourth lens is R9, and an Abbe number of the material of the third lens for d-line is ?d3, and an Abbe number of the material of the fifth lens for d-line is ?d5, the following conditional formulas (1) and (6) are satisfied: ?0.61<(R8+R9)/(R8?R9)<0.44??(1); and 38.1<?d3+?d5<45.1??(6).Type: GrantFiled: March 19, 2014Date of Patent: May 12, 2015Assignee: FUJIFILM CorporationInventors: Taro Asami, Toshiaki Katsuma, Toru Ito, Masato Kondo, Ryoko Otomo
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Patent number: 9019634Abstract: An imaging lens substantially consists of six lenses of a negative first lens, a negative second lens, a positive third lens, a positive fourth lens, a negative fifth lens and a positive sixth lens in this order from an object side. An object-side surface of the second lens is concave, and an object-side surface of the third lens is concave. A predetermined conditional formula about a combined focal length of the fourth lens and the fifth lens is satisfied.Type: GrantFiled: March 25, 2014Date of Patent: April 28, 2015Assignee: FUJIFILM CorporationInventors: Taro Asami, Toshiaki Katsuma, Toru Ito, Masato Kondo, Ryoko Otomo
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Publication number: 20140340767Abstract: An imaging lens is composed of a first lens having a negative meniscus shape with a convex surface on the object side, a negative second lens, a positive third lens, an aperture stop, a negative fourth lens, and a positive fifth lens disposed in order from the object side. The fourth and the fifth lens are cemented with an interface which is convex on the object side and has an aspherical shape. If the radius of curvature is taken as R9 and the focal length of the entire system is taken as f, the imaging lens satisfies a conditional expression given below: 1.Type: ApplicationFiled: May 9, 2014Publication date: November 20, 2014Applicant: FUJIFILM CorporationInventors: Masao MORI, Ryoko OTOMO
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Publication number: 20140204477Abstract: An imaging lens substantially consists of six lenses of a negative first lens, a negative second lens, a positive third lens, a positive fourth lens, a negative fifth lens and a positive sixth lens in this order from an object side. An object-side surface of the second lens is concave, and an object-side surface of the third lens is concave. A predetermined conditional formula about a combined focal length of the fourth lens and the fifth lens is satisfied.Type: ApplicationFiled: March 25, 2014Publication date: July 24, 2014Applicant: FUJIFILM CorporationInventors: Taro ASAMI, Toshiaki KATSUMA, Toru ITO, Masato KONDO, Ryoko OTOMO
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Publication number: 20140204478Abstract: An imaging lens substantially consists of six lenses of a negative first lens, a negative second lens, a positive third lens, a positive fourth lens, a negative fifth lens and a positive sixth lens in this order from an object side. When a curvature radius of an object-side surface of the fourth lens is R8, and a curvature radius of an image-side surface of the fourth lens is R9, and an Abbe number of the material of the third lens for d-line is ?d3, and an Abbe number of the material of the fifth lens for d-line is ?d5, the following conditional formulas (1) and (6) are satisfied: ?0.61<(R8+R9)/(R8?R9)<0.44??(1); and 38.1<?d3+?d5<45.1??(6).Type: ApplicationFiled: March 19, 2014Publication date: July 24, 2014Applicant: FUJIFILM CorporationInventors: Taro ASAMI, Toshiaki KATSUMA, Toru ITO, Masato KONDO, Ryoko OTOMO
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Patent number: 8345323Abstract: Provided is a fast image reading lens system capable of achieving compactness and satisfactorily correcting various aberrations. The image reading lens system includes, in order from an object side: a positive first lens of which a convex surface faces toward the object side; a second lens formed as a biconcave lens; a third lens formed as a biconvex lens; a positive fourth lens of which a convex surface faces toward an image side; and a negative fifth lens of which a convex surface faces toward the image side. Assuming that a focal length of the whole lens system is f, a focal length of the fourth lens is f4, and a space between an image side surface of the fourth lens and an object side surface of the fifth lens on an optical axis is D8, the lens system satisfies the following conditional expressions: 0.06<D8/f<0.16, and 0.77<f4/f<1.81.Type: GrantFiled: June 24, 2010Date of Patent: January 1, 2013Assignee: FUJIFILM CorporationInventor: Ryoko Otomo
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Patent number: 8248715Abstract: An imaging lens is provided and includes, in order from the object side, a front group having a negative power, a stop, and a rear group having a positive power. The front group includes, in order from the object side, a first negative lens having a meniscus shape with a concave surface on an image side, a second negative lens, and a third positive lens. The rear group includes, in order from the object side, a fourth positive lens, a fifth negative lens having a meniscus shape with a concave surface on the object side, and a sixth positive lens. An Abbe number of each of the first lens, the second lens, the fourth lens, and the sixth lens at the d-line is equal to or larger than 40, and an Abbe number of each of the third lens and the fifth lens at the d-line is equal to or smaller than 40. Each lens constituting the front group and the rear group is a single lens.Type: GrantFiled: December 10, 2009Date of Patent: August 21, 2012Assignee: Fujifilm CorporationInventors: Taro Asami, Ryoko Otomo
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Publication number: 20100328730Abstract: Provided is a fast image reading lens system capable of achieving compactness and satisfactorily correcting various aberrations. The image reading lens system includes, in order from an object side: a positive first lens of which a convex surface faces toward the object side; a second lens formed as a biconcave lens; a third lens formed as a biconvex lens; a positive fourth lens of which a convex surface faces toward an image side; and a negative fifth lens of which a convex surface faces toward the image side. Assuming that a focal length of the whole lens system is f, a focal length of the fourth lens is f4, and a space between an image side surface of the fourth lens and an object side surface of the fifth lens on an optical axis is D8, the lens system satisfies the following conditional expressions: 0.06<D8/f<0.16, and 0.77<f4/f<1.81.Type: ApplicationFiled: June 24, 2010Publication date: December 30, 2010Inventor: Ryoko OTOMO
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Patent number: 7843652Abstract: A wide-angle imaging lens is provided and includes: a first lens, a second lens, and a third lens in this order from the object side. The first lens is a negative meniscus and has a convex surface on the object side; the second lens, at least one surface of which is an aspherical surface; and the third lens is a positive lens and has a convex surface on the image side and at least one surface of the third lens is an aspherical surface. The first len is made of a material having an Abbe number of 40 or more and the third lens is made of a material having an Abbe number of 50 or more. An aperture stop is disposed between the second lens and the third lens.Type: GrantFiled: October 19, 2006Date of Patent: November 30, 2010Assignee: Fujinon CorporationInventors: Taro Asami, Ryoko Otomo