Patents by Inventor Koki TOKUNO
Koki TOKUNO 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: 11988820Abstract: There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive or negative refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power, wherein said first lens is formed in a meniscus shape having an object-side surface being convex in a paraxial region, said second lens has an object-side surface being convex in a paraxial region, said sixth lens has an image-side surface being concave in a paraxial region, and the predetermined conditional expressions are satisfied.Type: GrantFiled: April 28, 2021Date of Patent: May 21, 2024Assignee: TOKYO VISIONARY OPTICS CO., LTD.Inventors: Yukio Sekine, Koki Tokuno, Zhiyu Huang
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Patent number: 11726300Abstract: There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power having an object-side surface being convex in a paraxial region, a second lens with negative refractive power having an object-side surface being convex in a paraxial region, a third lens with negative refractive power having an image-side surface being concave in a paraxial region, a fourth lens with positive refractive power in a paraxial region, and a fifth lens with negative refractive power having an object-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.Type: GrantFiled: June 8, 2020Date of Patent: August 15, 2023Assignee: TOKYO VISIONARY OPTICS CO., LTD.Inventor: Koki Tokuno
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Publication number: 20230064302Abstract: There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power, a second lens, a third lens, a fourth lens, a fifth lens with positive refractive power, a sixth lens, and a seventh lens with negative refractive power, wherein said first lens has an object-side surface being convex in a paraxial region, and said fifth lens has an image-side surface being convex in a paraxial region, and predetermined conditional expressions are satisfied.Type: ApplicationFiled: November 24, 2021Publication date: March 2, 2023Inventors: Yukio SEKINE, Koki TOKUNO
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Publication number: 20230003975Abstract: There is provided an imaging lens having a low profile and a low F-number and allowing satisfactory correction of aberrations. An imaging lens comprises in order from an object side, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3, a fourth lens L4 with positive refractive power, and a fifth lens L5 with negative refractive power, wherein an image-side surface of said fourth lens L4 is convex in a paraxial region, an object-side surface of said fifth lens L5 is an aspheric surface having at least one inflection point, and the following conditional expressions are satisfied: f/Dep<2.0??(1) 1.2<T3/T2<1.8 ??(2) 15<vd3<35 ??(3) ?1.0<R5f/R5r<?0.Type: ApplicationFiled: November 4, 2021Publication date: January 5, 2023Inventors: Koki TOKUNO, Ruidong YANG
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Patent number: 11500177Abstract: There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power having an object-side surface being convex in a paraxial region, a second lens with negative refractive power having an object-side surface being convex in a paraxial region, a third lens with negative refractive power in a paraxial region, a fourth lens, and a fifth lens having an image-side surface being convex in a paraxial region, and predetermined conditional expressions are satisfied.Type: GrantFiled: June 8, 2020Date of Patent: November 15, 2022Assignee: TOKYO VISIONARY OPTICS CO., LTD.Inventors: Koki Tokuno, Huang Yunbai
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Publication number: 20220326490Abstract: There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power, wherein said first lens has an object-side surface being convex in a paraxial region, said fifth lens is formed in a biconcave shape in a paraxial region, and said seventh lens is formed in a meniscus shape having an image-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.Type: ApplicationFiled: November 5, 2021Publication date: October 13, 2022Inventors: Koki TOKUNO, Zhiyu HUANG
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Publication number: 20220196982Abstract: There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, a sixth lens, and a seventh lens with negative refractive power, wherein said fourth lens has an image-side surface being convex in a paraxial region, said seventh lens has an image-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.Type: ApplicationFiled: July 27, 2021Publication date: June 23, 2022Inventors: Koki TOKUNO, Zhiyu HUANG
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Publication number: 20220155567Abstract: There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive or negative refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power, wherein said first lens is formed in a meniscus shape having an object-side surface being convex in a paraxial region, said second lens has an object-side surface being convex in a paraxial region, said sixth lens has an image-side surface being concave in a paraxial region, and the predetermined conditional expressions are satisfied.Type: ApplicationFiled: April 28, 2021Publication date: May 19, 2022Inventors: Yukio SEKINE, Koki TOKUNO, Zhiyu HUANG
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Publication number: 20220155568Abstract: There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive or negative refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power, wherein said first lens is formed in a meniscus shape having an object-side surface being convex in a paraxial region, said second lens has an object-side surface being convex in a paraxial region, said sixth lens has an image-side surface being concave in a paraxial region, and the predetermined conditional expressions are satisfied.Type: ApplicationFiled: August 2, 2021Publication date: May 19, 2022Inventors: Yukio SEKINE, Koki TOKUNO, Zhiyu HUANG
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Publication number: 20210157100Abstract: There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power having an object-side surface being convex in a paraxial region, a second lens with negative refractive power having an object-side surface being convex in a paraxial region, a third lens with negative refractive power having an image-side surface being concave in a paraxial region, a fourth lens with positive refractive power in a paraxial region, and a fifth lens with negative refractive power having an object-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied.Type: ApplicationFiled: June 8, 2020Publication date: May 27, 2021Inventor: Koki TOKUNO
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Publication number: 20210157099Abstract: There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power having an object-side surface being convex in a paraxial region, a second lens with negative refractive power having an object-side surface being convex in a paraxial region, a third lens with negative refractive power in a paraxial region, a fourth lens, and a fifth lens having an image-side surface being convex in a paraxial region, and predetermined conditional expressions are satisfied.Type: ApplicationFiled: June 8, 2020Publication date: May 27, 2021Inventors: Koki TOKUNO, Huang YUNBAI