Patents by Inventor Daiki Kawamura
Daiki Kawamura 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: 20240103256Abstract: An imaging lens includes a positive first lens group and a second lens group, which are continuous in order from the position closest to the object side, as lens groups. During focusing, the distance between the first lens group and the second lens group changes. A stop is disposed closer to the image side than a lens which is second from the object side. A combined refractive power of all lenses closer to the object side than the stop is positive. The imaging lens includes an LA positive lens and an LB positive lens that satisfy a predetermined conditional expression at a position closer to the object side than the stop. An Abbe number of the LB positive lens is the maximum among Abbe numbers of all positive lenses closer to the object side than the stop.Type: ApplicationFiled: October 31, 2023Publication date: March 28, 2024Applicant: FUJIFILM CorporationInventors: Daiki KAWAMURA, Michio CHO
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Publication number: 20240077707Abstract: An imaging lens includes a positive first lens group and a second lens group, which are continuous in order from the position closest to the object side, as lens groups. During focusing, the distance between the first lens group and the second lens group changes. A stop is disposed closer to the image side than a lens which is second from the object side. A combined refractive power of all lenses closer to the object side than the stop is positive. The imaging lens includes an LA positive lens and an LB positive lens that satisfy a predetermined conditional expression at a position closer to the object side than the stop. An Abbe number of the LB positive lens is the maximum among Abbe numbers of all positive lenses closer to the object side than the stop.Type: ApplicationFiled: October 27, 2023Publication date: March 7, 2024Applicant: FUJIFILM CorporationInventors: Daiki KAWAMURA, Michio CHO
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Patent number: 11841486Abstract: An imaging lens includes a positive first lens group and a second lens group, which are continuous in order from the position closest to the object side, as lens groups. During focusing, the distance between the first lens group and the second lens group changes. A stop is disposed closer to the image side than a lens which is second from the object side. A combined refractive power of all lenses closer to the object side than the stop is positive. The imaging lens includes an LA positive lens and an LB positive lens that satisfy a predetermined conditional expression at a position closer to the object side than the stop. An Abbe number of the LB positive lens is the maximum among Abbe numbers of all positive lenses closer to the object side than the stop.Type: GrantFiled: January 22, 2021Date of Patent: December 12, 2023Assignee: FUJIFILM CorporationInventors: Daiki Kawamura, Michio Cho
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Publication number: 20230393376Abstract: The zoom lens includes, as lens groups, in order from the object side, only a first lens group having a positive power, a second lens group having a negative power, a third lens group having a positive power, a fourth lens group having a negative power, and a fifth lens group having a positive power. An aperture stop is disposed between a lens surface closest to the image side in the second lens group and a lens surface closest to the object side in the fourth lens group. During zooming, at least the first lens group, the second lens group, the third lens group, and the fourth lens group move. The first lens group consists of a negative lens, a positive lens, and a positive lens in order from the object side. The zoom lens satisfies predetermined conditional expressions.Type: ApplicationFiled: August 16, 2023Publication date: December 7, 2023Applicant: FUJIFILM CorporationInventors: Daiki KAWAMURA, Taiga NODA
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Patent number: 11774733Abstract: The zoom lens includes, as lens groups, in order from the object side, only a first lens group having a positive power, a second lens group having a negative power, a third lens group having a positive power, a fourth lens group having a negative power, and a fifth lens group having a positive power. An aperture stop is disposed between a lens surface closest to the image side in the second lens group and a lens surface closest to the object side in the fourth lens group. During zooming, at least the first lens group, the second lens group, the third lens group, and the fourth lens group move. The first lens group consists of a negative lens, a positive lens, and a positive lens in order from the object side. The zoom lens satisfies predetermined conditional expressions.Type: GrantFiled: January 7, 2022Date of Patent: October 3, 2023Assignee: FUJIFILM CorporationInventors: Daiki Kawamura, Taiga Noda
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Publication number: 20230266565Abstract: An imaging lens includes, in order from the object side, a first lens group that has a negative refractive power and a second lens group that has a positive refractive power. During focusing, only the second lens group moves. The first lens group includes three negative lenses successively in order from a position closest to the object side. Assuming that an open F number is FNo, a maximum half angle of view is ?, a back focal length is Bf, and a focal length of the whole system f, the imaging lens satisfies 0.8<FNo/tan ?<1.9 and 0.3<Bf/(fĂ—tan ?)<1.2.Type: ApplicationFiled: February 15, 2023Publication date: August 24, 2023Applicant: FUJIFILM CorporationInventors: Motoari OTA, Daiki KAWAMURA
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Publication number: 20230213743Abstract: A zoom lens includes a negative first lens group, a positive second lens group, and a subsequent lens group in order from an object side. A focusing lens group closer to an image side than the first lens group moves during focusing. The first lens group consists of a first-a lens group and a first-b lens group in order from the object side. Assuming that an average of refractive indices of the negative lenses of the first-a lens group is Nd1ave, a focal length of the focusing lens group is ff, and a focal length of the first lens group is f1, Conditional Expression (1) of 1.73<Nd1ave<1.95 and Conditional Expression (2) of 1<|ff/f1|<3 are satisfied.Type: ApplicationFiled: March 15, 2023Publication date: July 6, 2023Applicant: FUJIFILM CorporationInventor: Daiki KAWAMURA
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Patent number: 11640049Abstract: A zoom lens includes a negative first lens group, a positive second lens group, and a subsequent lens group in order from an object side. A focusing lens group closer to an image side than the first lens group moves during focusing. The first lens group consists of a first-a lens group and a first-b lens group in order from the object side. Assuming that an average of refractive indices of the negative lenses of the first-a lens group is Nd1ave, a focal length of the focusing lens group is ff, and a focal length of the first lens group is f1, Conditional Expression (1) of 1.73<Nd1ave<1.95 and Conditional Expression (2) of 1<|ff/f1|<3 are satisfied.Type: GrantFiled: September 6, 2022Date of Patent: May 2, 2023Assignee: FUJIFILM CorporationInventor: Daiki Kawamura
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Publication number: 20230052715Abstract: The zoom lens consists of, in order from an object side, a first lens group that has a positive refractive power, a second lens group that has a negative refractive power, a middle group that includes one or more lens groups, and a final lens group. The middle group has a positive refractive power as a whole throughout an entire zoom range. During zooming, a spacing between the first lens group and the second lens group changes, a spacing between the second lens group and the middle group changes, and a spacing between the middle group and the final lens group changes. The zoom lens satisfies predetermined conditional expressions.Type: ApplicationFiled: July 18, 2022Publication date: February 16, 2023Applicant: FUJIFILM CorporationInventors: Daiki KAWAMURA, Tetsuya ORI
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Publication number: 20230013899Abstract: A zoom lens includes a negative first lens group, a positive second lens group, and a subsequent lens group in order from an object side. A focusing lens group closer to an image side than the first lens group moves during focusing. The first lens group consists of a first-a lens group and a first-b lens group in order from the object side. Assuming that an average of refractive indices of the negative lenses of the first-a lens group is Nd1ave, a focal length of the focusing lens group is ff, and a focal length of the first lens group is f1. Conditional Expression (1) of 1.73<Nd1ave<1.95 and Conditional Expression (2) of 1<Iff/f1I<3 are satisfied.Type: ApplicationFiled: September 6, 2022Publication date: January 19, 2023Applicant: FUJIFILM CorporationInventor: Daiki KAWAMURA
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Patent number: 11543636Abstract: The zoom lens includes, as lens groups, in order from the object side, only a first lens group having a positive power, a second lens group having a negative power, a third lens group having a positive power, a fourth lens group having a negative power, and a fifth lens group having a positive power. An aperture stop is disposed between a lens surface closest to the image side in the second lens group and a lens surface closest to the object side in the fourth lens group. During zooming, at least the first lens group, the second lens group, the third lens group, and the fourth lens group move. The first lens group consists of a negative lens, a positive lens, and a positive lens in order from the object side. The zoom lens satisfies predetermined conditional expressions.Type: GrantFiled: April 22, 2022Date of Patent: January 3, 2023Assignee: FUJIFILM CorporationInventors: Daiki Kawamura, Taiga Noda
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Patent number: 11480775Abstract: A zoom lens includes a negative first lens group, a positive second lens group, and a subsequent lens group in order from an object side. A focusing lens group closer to an image side than the first lens group moves during focusing. The first lens group consists of a first-a lens group and a first-b lens group in order from the object side. Assuming that an average of refractive indices of the negative lenses of the first-a lens group is Nd1ave, a focal length of the focusing lens group is ff, and a focal length of the first lens group is f1, Conditional Expression (1) of 1.73<Nd1ave<1.95 and Conditional Expression (2) of 1<|ff/f1|<3 are satisfied.Type: GrantFiled: December 31, 2020Date of Patent: October 25, 2022Assignee: FUJIFILM CorporationInventor: Daiki Kawamura
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Publication number: 20220244512Abstract: The zoom lens includes, as lens groups, in order from the object side, only a first lens group having a positive power, a second lens group having a negative power, a third lens group having a positive power, a fourth lens group having a negative power, and a fifth lens group having a positive power. An aperture stop is disposed between a lens surface closest to the image side in the second lens group and a lens surface closest to the object side in the fourth lens group. During zooming, at least the first lens group, the second lens group, the third lens group, and the fourth lens group move. The first lens group consists of a negative lens, a positive lens, and a positive lens in order from the object side. The zoom lens satisfies predetermined conditional expressions.Type: ApplicationFiled: April 22, 2022Publication date: August 4, 2022Applicant: FUJIFILM CorporationInventors: Daiki KAWAMURA, Taiga NODA
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Patent number: 11353682Abstract: The imaging lens comprises, successively in order from the object side, a positive first lens group that does not move during focusing, a second lens group that moves during focusing, a stop, and a positive third lens group that consists of all lenses moving integrally with the second lens group during focusing. The composite focal length of the second lens group and the third lens group is positive. The first lens group includes four or more positive lenses and three or more negative lenses. The imaging lens satisfies predetermined conditional expressions.Type: GrantFiled: January 28, 2020Date of Patent: June 7, 2022Assignee: FUJIFILM CorporationInventors: Daiki Kawamura, Michio Cho
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Patent number: 11350019Abstract: The lens device includes an imaging lens and a controller. The imaging lens includes a focusing lens group which moves during focusing and an aberration correction lens group having a refractive power lower than a refractive power of the focusing lens group having the lowest refractive power. The controller adjusts a position of the aberration correction lens group relative to the focusing lens group of which focus sensitivity is maximized according to a changed condition. A predetermined conditional expression related to the focus sensitivity of the focusing lens group is satisfied.Type: GrantFiled: March 18, 2019Date of Patent: May 31, 2022Assignee: FUJIFILM CorporationInventor: Daiki Kawamura
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Patent number: 11327282Abstract: A zoom lens includes a negative first lens group, a positive second lens group, and a subsequent lens group in order from an object side. A focusing lens group closer to an image side than the first lens group moves during focusing. The first lens group consists of a first-a lens group and a first-b lens group in order from the object side. Assuming that an average of refractive indices of the negative lenses of the first-a lens group is Nd1ave, a focal length of the focusing lens group is ff, and a focal length of the first lens group is f1, Conditional Expression (1) of 1.73<Nd1ave<1.95 and Conditional Expression (2) of 1<|ff/f1|<3 are satisfied.Type: GrantFiled: September 30, 2021Date of Patent: May 10, 2022Assignee: FUJIFILM CorporationInventor: Daiki Kawamura
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Publication number: 20220128805Abstract: The zoom lens includes, as lens groups, in order from the object side, only a first lens group having a positive power, a second lens group having a negative power, a third lens group having a positive power, a fourth lens group having a negative power, and a fifth lens group having a positive power. An aperture stop is disposed between a lens surface closest to the image side in the second lens group and a lens surface closest to the object side in the fourth lens group. During zooming, at least the first lens group, the second lens group, the third lens group, and the fourth lens group move. The first lens group consists of a negative lens, a positive lens, and a positive lens in order from the object side. The zoom lens satisfies predetermined conditional expressions.Type: ApplicationFiled: January 7, 2022Publication date: April 28, 2022Applicant: FUJIFILM CorporationInventors: Daiki KAWAMURA, Taiga NODA
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Patent number: 11300764Abstract: The zoom lens includes, as lens groups, in order from the object side, only a first lens group having a positive power, a second lens group having a negative power, a third lens group having a positive power, a fourth lens group having a negative power, and a fifth lens group having a positive power. An aperture stop is disposed between a lens surface closest to the image side in the second lens group and a lens surface closest to the object side in the fourth lens group. During zooming, at least the first lens group, the second lens group, the third lens group, and the fourth lens group move. The first lens group consists of a negative lens, a positive lens, and a positive lens in order from the object side. The zoom lens satisfies predetermined conditional expressions.Type: GrantFiled: November 20, 2019Date of Patent: April 12, 2022Assignee: FUJIFILM CorporationInventors: Daiki Kawamura, Taiga Noda
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Publication number: 20220035143Abstract: A zoom lens includes a negative first lens group, a positive second lens group, and a subsequent lens group in order from an object side. A focusing lens group closer to an image side than the first lens group moves during focusing. The first lens group consists of a first-a lens group and a first-b lens group in order from the object side. Assuming that an average of refractive indices of the negative lenses of the first-a lens group is Nd1ave, a focal length of the focusing lens group is ff, and a focal length of the first lens group is f1, Conditional Expression (1) of 1.73<Nd1ave<1.95 and Conditional Expression (2) of 1<|ff/f1|<3 are satisfied.Type: ApplicationFiled: September 30, 2021Publication date: February 3, 2022Applicant: FUJIFILM CorporationInventor: Daiki KAWAMURA
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Publication number: 20210341709Abstract: An imaging lens includes, successively in order from a position closest to an object side, a positive first lens group that does not move during focusing, a stop, and a positive second lens group that moves during focusing. The second lens group consists of all lenses that integrally move during focusing. The imaging lens satisfies predetermined conditional expressions.Type: ApplicationFiled: July 16, 2021Publication date: November 4, 2021Applicant: FUJIFILM CorporationInventors: Daiki KAWAMURA, Michio CHO