Patents by Inventor Hisao Fukaya
Hisao Fukaya 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: 20170351067Abstract: An imaging lens includes a first lens group and a second lens group arranged in this order from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens having negative refractive power, and a third lens, arranged with a space in between. The second lens group includes a front side lens group having negative refractive power and a rear side lens group having positive refractive power. The front side lens group includes a fourth lens and a fifth lens arranged with a space in between. The rear side lens group includes a sixth lens and a seventh lens arranged with a space in between. The fourth lens is formed in a shape so that a surface thereof on the object side has a specific curvature radius so that a specific conditional expression is satisfied.Type: ApplicationFiled: August 24, 2017Publication date: December 7, 2017Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
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Patent number: 9835825Abstract: An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens having positive refractive power; a fourth lens; a fifth lens; and a sixth lens, arranged in this order from an object side to an image plane side. The fifth lens is formed in a shape so that a surface thereof on the image plane side has a positive curvature radius. The fifth lens and the sixth lens have a specific composite focal length. The first lens is disposed away from the second lens by a specific distance on an optical axis thereof. The second lens is disposed away from the third lens by a specific distance.Type: GrantFiled: February 25, 2016Date of Patent: December 5, 2017Assignees: OPTICAL LOGIC INC., KANTATSU CO., LTD.Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Hisao Fukaya
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Patent number: 9823439Abstract: A compact high-resolution imaging lens which meets the demands for low-profileness, a low F-value and a wide field of view and corrects aberrations properly. It includes, in order from the object side: a first positive lens having a convex object-side surface; a second negative lens having a convex object-side surface; a third lens; a fourth positive lens; and a fifth negative double-sided aspheric lens having a concave image-side surface. When Fno denotes F-number, ih maximum image height, TTL total track length, f45 the composite focal length of the fourth and fifth lenses, r5 and r6 the curvature radii of the third lens object-side and image-side surfaces, r7 and r8 the curvature radii of the fourth lens object-side and image-side surfaces, and r9 and r10 the curvature radii of the fifth lens object-side and image-side surfaces, respectively, it satisfies the following conditions: Fno?2.4; TTL/2ih<0.9; f45<0; 0<r5/r6<4.0; 0.5<(r7+r8)/(r7?r8)<3.0; and 0.4<(r9+r10)/(r9?r10)<4.0.Type: GrantFiled: April 14, 2016Date of Patent: November 21, 2017Assignee: KANTATSU CO., LTD.Inventors: Masaya Hashimoto, Hisao Fukaya
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Publication number: 20170329109Abstract: An imaging lens includes a first lens having positive refractive power; a second lens having positive refractive power; a third lens; a fourth lens; a fifth lens; and a sixth lens having negative refractive power, arranged in this order from an object side to an image plane side. The sixth lens is formed in a shape so that a curvature radius of a surface thereof on the object side and a curvature radius of a surface thereof on the image plane side are negative. The surface of the sixth lens on the image plane side has the specific curvature radius so that a specific conditional expression is satisfied.Type: ApplicationFiled: April 5, 2017Publication date: November 16, 2017Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
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Patent number: 9804359Abstract: An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens having negative refractive power; a fourth lens; a fifth lens; and a sixth lens having negative refractive power, arranged in this order from an object side to an image plane side. The fourth lens and the fifth lens have a composite focal length f45, and the third lens has an Abbe's number ?d3 so that the following conditional expressions are satisfied: 0<f45, 40<?d3<75.Type: GrantFiled: November 18, 2015Date of Patent: October 31, 2017Assignees: OPTICAL LOGIC INC., KANTATSU CO., LTD.Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Hisao Fukaya
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Patent number: 9772475Abstract: An imaging lens includes a first lens group having positive refractive power and a second lens group having negative refractive power, arranged in this order from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens having negative refractive power, and a third lens. The second lens group includes a front side lens group having negative refractive power and a rear side lens group having positive refractive power. The front side lens group includes a fourth lens and a fifth lens. The rear side lens group includes a sixth lens and a seventh lens. The first lens group is arranged to be away from the second lens group by a specific distance on an optical axis thereof. The first to third lenses have specific Abbe's numbers.Type: GrantFiled: August 12, 2016Date of Patent: September 26, 2017Assignees: OPTICAL LOGIC INC., KANTATSU CO., LTD.Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Hisao Fukaya
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Publication number: 20170176723Abstract: An imaging lens in which a positive first lens group, a positive second lens group, and a negative third lens group are arranged in order from the object side. The first lens group includes a positive first lens having a convex object-side surface and a second lens. The second lens group includes third and fourth lenses each having at least one aspheric surface. The third lens group includes a fifth lens, a sixth lens as a double-sided aspheric lens, and a seventh lens having a concave image-side surface near an optical axis. The lenses are not joined to each other, the seventh lens has an aspheric image-side surface whose shape changes from concave to convex as the distance from the optical axis increases, and an F-number is less than 1.8.Type: ApplicationFiled: March 10, 2017Publication date: June 22, 2017Applicant: KANTATSU CO., LTD.Inventor: Hisao FUKAYA
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Publication number: 20170153425Abstract: An imaging lens includes a first lens group and a second lens group, arranged from an object side to an image plane side. The first lens group includes two lenses having positive refractive power, one lens having negative refractive power and at least one aspheric surface, and an aperture stop disposed between the two positive lenses. The second lens group includes one lens having positive refractive power and at least one aspheric surface and two lenses having negative refractive power and two aspheric surfaces. The lens of the second lens group situated at a nearest position to the image plane side is formed so that a curvature radius of the surface on the object side and a curvature radius of the surface on the image plane side are negative near an optical axis thereof. The first lens group is arranged away from the second lens group by a specific distance.Type: ApplicationFiled: February 13, 2017Publication date: June 1, 2017Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
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Publication number: 20170153426Abstract: An imaging lens includes a first lens group and a second lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens having positive refractive power and at least one aspheric surface, and a third lens having two aspheric surfaces, arranged with a space in between. The second lens group includes a fourth lens having two aspheric surfaces, a fifth lens having negative refractive power and two aspheric surfaces, and a sixth lens having two aspheric surfaces, arranged with a space in between. The third lens is arranged away from the fourth lens by a specific distance, and the fifth lens and the sixth lens have a specific composite focal length, so that specific conditional expressions are satisfied.Type: ApplicationFiled: February 13, 2017Publication date: June 1, 2017Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
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Publication number: 20170131524Abstract: An imaging lens includes a first lens group and a second lens group, arranged from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens having positive refractive power, and a third lens having at least one aspheric surface, arranged with a space in between. The second lens group includes a fourth lens having positive refractive power and at least one aspheric surface, a fifth lens having two aspheric surfaces, and a sixth lens having two aspheric surfaces, arranged with a space in between. The fifth lens is formed in a shape so that a curvature radius of the surface on the image plane side is positive near an optical axis. The sixth lens is formed in a shape so that a curvature radius of the surface on the object side is negative near an optical axis.Type: ApplicationFiled: January 25, 2017Publication date: May 11, 2017Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
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Publication number: 20170131525Abstract: An imaging lens includes a first lens group and a second lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens having at least one aspheric surface, and a third lens having at least one aspheric surface, arranged with a space in between. The second lens group includes a fourth lens having at least one aspheric surface, a fifth lens having negative refractive power and two aspheric surfaces, and a sixth lens having negative refractive power and two aspheric surfaces, arranged with a space in between. The sixth lens is formed in a shape so that a curvature radius of the surface on the object side is negative near an optical axis. The first lens has a specific focal length so that a specific conditional expression is satisfied.Type: ApplicationFiled: January 25, 2017Publication date: May 11, 2017Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
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Patent number: 9638896Abstract: An imaging lens in which a positive first lens group, a positive second lens group, and a negative third lens group are arranged in order from the object side. The first lens group includes a positive first lens having a convex object-side surface and a second lens. The second lens group includes third and fourth lenses each having at least one aspheric surface. The third lens group includes a fifth lens, a sixth lens as a double-sided aspheric lens, and a seventh lens having a concave image-side surface near an optical axis. The lenses are not joined to each other, the seventh lens has an aspheric image-side surface whose shape changes from concave to convex as the distance from the optical axis increases, and an F-number is less than 1.8.Type: GrantFiled: April 22, 2015Date of Patent: May 2, 2017Assignee: KANTATSU CO., LTD.Inventor: Hisao Fukaya
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Publication number: 20170102527Abstract: An imaging lens includes a first lens group and a second lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens having positive refractive power, and a third lens having at least one aspheric surface, arranged with a space in between. The second lens group includes a fourth lens having positive refractive power and at least one aspheric surface, a fifth lens having two aspheric surfaces, and a sixth lens having two aspheric surfaces, arranged with a space in between. The sixth lens is formed in a shape so that a curvature radius of the surface thereof on the image plane side is negative near an optical axis thereof.Type: ApplicationFiled: December 21, 2016Publication date: April 13, 2017Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
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Publication number: 20170102528Abstract: An imaging lens includes a first lens group and a second lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens, and a third lens having at least one aspheric surface, arranged with a space in between. The second lens group includes a fourth lens having at least one aspheric surface, a fifth lens having negative refractive power and two aspheric surfaces, and a sixth lens having two aspheric surfaces, arranged with a space in between. The second lens is formed in a shape so that a curvature radius of a surface on the image plane side is negative near an optical axis. The sixth lens is formed in a shape so that a curvature radius of the surface on the image plane side is negative near an optical axis.Type: ApplicationFiled: December 21, 2016Publication date: April 13, 2017Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
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Publication number: 20170059827Abstract: An imaging lens includes a first lens group having positive refractive power and a second lens group having negative refractive power, arranged in this order from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens having negative refractive power, and a third lens. The second lens group includes a front side lens group having negative refractive power and a rear side lens group having positive refractive power. The front side lens group includes a fourth lens and a fifth lens. The rear side lens group includes a sixth lens and a seventh lens. The first lens group is arranged to be away from the second lens group by a specific distance on an optical axis thereof. The first to third lenses have specific Abbe's numbers.Type: ApplicationFiled: August 12, 2016Publication date: March 2, 2017Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
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Patent number: 9575294Abstract: An imaging lens includes a first lens group and a second lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens, a second lens having positive refractive power, and a third lens. The second lens group includes a fourth lens, a fifth lens, and a sixth lens. The third lens and the fourth lens are arranged in a specific configuration.Type: GrantFiled: April 18, 2016Date of Patent: February 21, 2017Assignees: OPTICAL LOGIC INC., KANTATSU CO., LTD.Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Hisao Fukaya
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Publication number: 20160356989Abstract: An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens having positive refractive power; a fourth lens; a fifth lens; and a sixth lens, arranged in this order from an object side to an image plane side. The fifth lens is formed in a shape so that a surface thereof on the image plane side has a positive curvature radius. The fifth lens and the sixth lens have a specific composite focal length. The first lens is disposed away from the second lens by a specific distance on an optical axis thereof. The second lens is disposed away from the third lens by a specific distance.Type: ApplicationFiled: February 25, 2016Publication date: December 8, 2016Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
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Publication number: 20160356993Abstract: An imaging lens includes a first lens group and a second lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens having positive refractive power, and a third lens. The second lens group includes a fourth lens, a fifth lens having negative refractive power, and a sixth lens. The sixth lens has a concave surface facing the object side near an optical axis thereof.Type: ApplicationFiled: August 16, 2016Publication date: December 8, 2016Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
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Publication number: 20160313536Abstract: An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens having negative refractive power; a fourth lens; a fifth lens; and a sixth lens having negative refractive power, arranged in this order from an object side to an image plane side. The fourth lens and the fifth lens have a composite focal length f45, and the third lens has an Abbe's number ?d3 so that the following conditional expressions are satisfied: 0<f45, 40<?d3<75.Type: ApplicationFiled: November 18, 2015Publication date: October 27, 2016Inventors: Yoji KUBOTA, Kenichi KUBOTA, Hitoshi HIRANO, Hisao FUKAYA
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Publication number: 20160306143Abstract: A compact high-resolution imaging lens which meets the demands for low-profileness, a low F-value and a wide field of view and corrects aberrations properly. It includes, in order from the object side: a first positive lens having a convex object-side surface; a second negative lens having a convex object-side surface; a third lens; a fourth positive lens; and a fifth negative double-sided aspheric lens having a concave image-side surface. When Fno denotes F-number, ih maximum image height, TTL total track length, f45 the composite focal length of the fourth and fifth lenses, r5 and r6 the curvature radii of the third lens object-side and image-side surfaces, r7 and r8 the curvature radii of the fourth lens object-side and image-side surfaces, and r9 and r10 the curvature radii of the fifth lens object-side and image-side surfaces, respectively, it satisfies the following conditions: Fno?2.4; TTL/2ih<0.9; f45<0; 0<r5/r6<4.0; 0.5<(r7+r8)/(r7?r8)<3.0; and 0.4<(r9+r10)/(r9?r10)<4.0.Type: ApplicationFiled: April 14, 2016Publication date: October 20, 2016Inventors: MASAYA HASHIMOTO, HISAO FUKAYA