Patents by Inventor Akiko Naito
Akiko Naito 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: 10606045Abstract: A zoom lens comprises four lens unit, and at the time of zooming, each of a distance between a first positive lens unit and a first negative lens unit and a distance between a second negative lens unit and a second positive lens unit changes, and a distance between the first positive lens unit and the second negative lens unit widens more at the telephoto end than at the wide angle end, and the first positive lens unit includes an object-side sub-lens unit and an image-side sub-lens unit, and an aperture stop is disposed between the object-side sub-lens unit and the image-side sub-lens unit, and the first negative lens unit includes a negative lens and a positive lens, and a refracting surface nearest to an image in the first negative lens unit is concave toward the image side, and a refracting surface nearest to an object in the second positive lens unit is concave toward the object side, and a refracting surface nearest to the image in the second positive lens unit is convex toward the image side, and the zType: GrantFiled: April 4, 2018Date of Patent: March 31, 2020Assignee: OLYMPUS CORPORATIONInventors: Kazuteru Kawamura, Akiko Naito, Keitaro Yokoyama, Toshio Takahashi
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Patent number: 10107992Abstract: A telephoto lens includes in order from an object side, a first unit having a positive refractive power, a second unit having a negative refractive power, and a third unit having a positive refractive power, and a focusing from an infinite object point to an object point at a short distance is carried out by moving the second unit toward an image side, and the following conditional expression (17) is satisfied: 0.2<Y2/Y1a<0.32??(17) where, Y2 denotes a maximum height of an axial light ray on a surface of incidence of the second lens unit, and Y1a denotes a maximum height of an axial light ray on a surface of incidence of the first lens unit.Type: GrantFiled: September 1, 2015Date of Patent: October 23, 2018Assignee: OLYMPUS CORPORATIONInventors: Yasuji Ogata, Akiko Naito, Kento Hara
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Publication number: 20180224641Abstract: A zoom lens comprises four lens unit, and at the time of zooming, each of a distance between a first positive lens unit and a first negative lens unit and a distance between a second negative lens unit and a second positive lens unit changes, and a distance between the first positive lens unit and the second negative lens unit widens more at the telephoto end than at the wide angle end, and the first positive lens unit includes an object-side sub-lens unit and an image-side sub-lens unit, and an aperture stop is disposed between the object-side sub-lens unit and the image-side sub-lens unit, and the first negative lens unit includes a negative lens and a positive lens, and a refracting surface nearest to an image in the first negative lens unit is concave toward the image side, and a refracting surface nearest to an object in the second positive lens unit is concave toward the object side, and a refracting surface nearest to the image in the second positive lens unit is convex toward the image side, and the zType: ApplicationFiled: April 4, 2018Publication date: August 9, 2018Inventors: Kazuteru Kawamura, Akiko Naito, Keitaro Yokoyama, Toshio Takahashi
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Patent number: 9977227Abstract: A zoom lens includes in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a negative refractive power. At the time of zooming, distances between the lens units change, and a distance between the first lens unit and the second lens unit at a telephoto end is shorter than a distance between the first lens unit and the second lens unit at a wide angle end, and an aperture stop is disposed on an image side of an image-side surface of the first lens unit, and on an object side of an image-side surface of the second lens unit, and the zoom lens satisfies the conditional expressions.Type: GrantFiled: November 24, 2015Date of Patent: May 22, 2018Assignee: OLYMPUS CORPORATIONInventors: Kazuteru Kawamura, Akiko Naito, Keitaro Yokoyama, Toshio Takahashi
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Patent number: 9964744Abstract: A zoom lens comprises four lens unit, and at the time of zooming, each of a distance between a first positive lens unit and a first negative lens unit and a distance between a second negative lens unit and a second positive lens unit changes, and a distance between the first positive lens unit and the second negative lens unit widens more at the telephoto end than at the wide angle end, and the first positive lens unit includes an object-side sub-lens unit and an image-side sub-lens unit, and an aperture stop is disposed between the object-side sub-lens unit and the image-side sub-lens unit, and the first negative lens unit includes a negative lens and a positive lens, and a refracting surface nearest to an image in the first negative lens unit is concave toward the image side, and a refracting surface nearest to an object in the second positive lens unit is concave toward the object side, and a refracting surface nearest to the image in the second positive lens unit is convex toward the image side, and the zType: GrantFiled: September 17, 2015Date of Patent: May 8, 2018Assignee: OLYMPUS CORPORATIONInventors: Kazuteru Kawamura, Akiko Naito, Keitaro Yokoyama, Toshio Takahashi
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Patent number: 9638917Abstract: A zoom lens includes a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a negative refractive power. At the time of zooming, distances between the lens units change, and a distance between the first lens unit and the second lens unit at a telephoto end is shorter than at a wide angle end. An aperture stop is disposed on the image side of an image-side surface of the first lens unit, and on the object side of an image-side surface of the second lens unit. The second lens unit includes two sub lens units. The object-side sub lens unit in the second lens unit includes one lens component. The following conditional expressions are satisfied. 3.0<?D12/ERS<4.5 1.05<|f3/fUN21|<2.Type: GrantFiled: August 10, 2016Date of Patent: May 2, 2017Assignee: Olympus CorporationInventors: Kazuteru Kawamura, Akiko Naito, Keitaro Yokoyama, Toshio Takahashi
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Publication number: 20160349505Abstract: A zoom lens includes a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a negative refractive power. At the time of zooming, distances between the lens units change, and a distance between the first lens unit and the second lens unit at a telephoto end is shorter than at a wide angle end. An aperture stop is disposed on the image side of an image-side surface of the first lens unit, and on the object side of an image-side surface of the second lens unit. The second lens unit includes two sub lens units. The object-side sub lens unit in the second lens unit includes one lens component. The following conditional expressions are satisfied. 3.0<?D12/ERS<4.5 1.05<|f3/fUN21|<2.Type: ApplicationFiled: August 10, 2016Publication date: December 1, 2016Inventors: Kazuteru Kawamura, Akiko Naito, Keitaro Yokoyama, Toshio Takahashi
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Patent number: 9465204Abstract: A zoom lens includes a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a negative refractive power. At the time of zooming, distances between the lens units change, and a distance between the first lens unit and the second lens unit at a telephoto end is shorter than at a wide angle end. An aperture stop is disposed on the image side of an image-side surface of the first lens unit, and on the object side of an image-side surface of the second lens unit. The second lens unit includes two sub lens units. The object-side sub lens unit in the second lens unit includes one lens component. The following conditional expressions are satisfied. 3.0<?D12/ERS<4.5 1.05<|f3/fUN21|<2.Type: GrantFiled: May 29, 2014Date of Patent: October 11, 2016Assignee: Olympus CorporationInventors: Kazuteru Kawamura, Akiko Naito, Keitaro Yokoyama, Toshio Takahashi
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Publication number: 20160109690Abstract: A telephoto lens includes in order from an object side, a first unit having a positive refractive power, a second unit having a negative refractive power, and a third unit having a positive refractive power, and a focusing from an infinite object point to an object point at a short distance is carried out by moving the second unit toward an image side, and the following conditional expression (17) is satisfied: 0.2<Y2/Y1a<0.32??(17) where, Y2 denotes a maximum height of an axial light ray on a surface of incidence of the second lens unit, and Y1a denotes a maximum height of an axial light ray on a surface of incidence of the first lens unit.Type: ApplicationFiled: September 1, 2015Publication date: April 21, 2016Inventors: Yasuji Ogata, Akiko Naito, Kento Hara
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Patent number: 9304298Abstract: A zoom lens includes a first positive lens unit, a first negative lens unit, a stop, and a second positive lens unit, and at the time of zooming, the first positive lens unit is stationary, the first negative lens unit and the second positive lens unit move, and at the time of focusing, the first positive lens unit is stationary, and the first positive lens unit includes a reflecting member and a first positive lens unit object-side system, and the first positive lens unit-object side system is positioned on the object side of the reflecting member, and has a negative refractive power, and the following conditional expressions are satisfied. 3.7<ft/fw 1.55<|D1N/D2P|<2.5 1.75<|f2P/D2P|<2.Type: GrantFiled: March 13, 2014Date of Patent: April 5, 2016Assignee: OLYMPUS CORPORATIONInventors: Koji Nakagawa, Koki Hozumi, Akiko Naito, Takeshi Hosoya
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Publication number: 20160077318Abstract: A zoom lens includes in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a negative refractive power. At the time of zooming, distances between the lens units change, and a distance between the first lens unit and the second lens unit at a telephoto end is shorter than a distance between the first lens unit and the second lens unit at a wide angle end, and an aperture stop is disposed on an image side of an image-side surface of the first lens unit, and on an object side of an image-side surface of the second lens unit, and the zoom lens satisfies the conditional expressions.Type: ApplicationFiled: November 24, 2015Publication date: March 17, 2016Inventors: Kazuteru Kawamura, Akiko Naito, Keitaro Yokoyama, Toshio Takahashi
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Patent number: 9235037Abstract: A zoom lens includes in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a negative refractive power. At the time of zooming, distances between the lens units change, and a distance between the first lens unit and the second lens unit at a telephoto end is shorter than a distance between the first lens unit and the second lens unit at a wide angle end, and an aperture stop is disposed on an image side of an image-side surface of the first lens unit, and on an object side of an image-side surface of the second lens unit, and the zoom lens satisfies the conditional expressions.Type: GrantFiled: June 19, 2014Date of Patent: January 12, 2016Assignee: OLYMPUS CORPORATIONInventors: Kazuteru Kawamura, Akiko Naito, Keitaro Yokoyama, Toshio Takahashi
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Publication number: 20160004054Abstract: A zoom lens comprises four lens unit, and at the time of zooming, each of a distance between a first positive lens unit and a first negative lens unit and a distance between a second negative lens unit and a second positive lens unit changes, and a distance between the first positive lens unit and the second negative lens unit widens more at the telephoto end than at the wide angle end, and the first positive lens unit includes an object-side sub-lens unit and an image-side sub-lens unit, and an aperture stop is disposed between the object-side sub-lens unit and the image-side sub-lens unit, and the first negative lens unit includes a negative lens and a positive lens, and a refracting surface nearest to an image in the first negative lens unit is concave toward the image side, and a refracting surface nearest to an object in the second positive lens unit is concave toward the object side, and a refracting surface nearest to the image in the second positive lens unit is convex toward the image side, and the zType: ApplicationFiled: September 17, 2015Publication date: January 7, 2016Inventors: Kazuteru Kawamura, Akiko Naito, Keitaro Yokoyama, Toshio Takahashi
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Publication number: 20140375870Abstract: A zoom lens includes in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a negative refractive power. At the time of zooming, distances between the lens units change, and a distance between the first lens unit and the second lens unit at a telephoto end is shorter than a distance between the first lens unit and the second lens unit at a wide angle end, and an aperture stop is disposed on an image side of an image-side surface of the first lens unit, and on an object side of an image-side surface of the second lens unit, and the zoom lens satisfies the conditional expressions.Type: ApplicationFiled: June 19, 2014Publication date: December 25, 2014Inventors: Kazuteru Kawamura, Akiko Naito, Keitaro Yokoyama, Toshio Takahashi
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Publication number: 20140354858Abstract: A zoom lens includes a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a negative refractive power. At the time of zooming, distances between the lens units change, and a distance between the first lens unit and the second lens unit at a telephoto end is shorter than at a wide angle end. An aperture stop is disposed on the image side of an image-side surface of the first lens unit, and on the object side of an image-side surface of the second lens unit. The second lens unit includes two sub lens units. The object-side sub lens unit in the second lens unit includes one lens component. The following conditional expressions are satisfied. 3.0<?D12/ERS<4.5 1.05<|f3/fUN21|<2.Type: ApplicationFiled: May 29, 2014Publication date: December 4, 2014Applicants: OLYMPUS CORPORATION, OLYMPUS IMAGING CORP.Inventors: Kazuteru Kawamura, Akiko Naito, Keitaro Yokoyama, Toshio Takahashi
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Publication number: 20140267877Abstract: A zoom lens includes a first positive lens unit, a first negative lens unit, a stop, and a second positive lens unit, and at the time of zooming, the first positive lens unit is stationary, the first negative lens unit and the second positive lens unit move, and at the time of focusing, the first positive lens unit is stationary, and the first positive lens unit includes a reflecting member and a first positive lens unit object-side system, and the first positive lens unit-object side system is positioned on the object side of the reflecting member, and has a negative refractive power, and the following conditional expressions are satisfied. 3.7<ft/fw 1.55<|D1N/D2P|<2.5 1.75<|f2P/D2P|<2.Type: ApplicationFiled: March 13, 2014Publication date: September 18, 2014Applicants: OLYMPUS CORPORATION, OLYMPUS IMAGING CORP.Inventors: Koji Nakagawa, Koki Hozumi, Akiko Naito, Takeshi Hosoya
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Patent number: 8416505Abstract: A zoom lens comprises in order from an object side, a first lens unit, a second lens unit, a third lens unit, a fourth lens unit, and a fifth lens unit having, respectively, a positive, negative, positive, negative, and positive refractive power. At the time of zooming from a wide angle end to a telephoto end, the first, third, and fourth lens units move toward the object side. A distance between the first and second lens units increase, a distance between the second and third lens units decrease, a distance between the third lens unit and the fourth lens unit changes, and a distance between the fourth lens unit and the fifth lens unit increases. The zoom lens satisfies the following expressions: 1.54<?4T/?4w<3.0??(1a) 1.0<?3T/?3w<5.0??(2) 1.0<?5T/?5w<3.0??(3).Type: GrantFiled: May 29, 2012Date of Patent: April 9, 2013Assignee: Olympus Imaging Corp.Inventors: Mayu Miki, Akinori Nishio, Takeshi Hosoya, Minoru Ueda, Akiko Naito, Tomoyuki Satori, Tetsuya Yanai
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Publication number: 20120300096Abstract: A zoom lens comprises in order from an object side, a first lens unit, a second lens unit, a third lens unit, a fourth lens unit, and a fifth lens unit having, respectively, a positive, negative, positive, negative, and positive refractive power. At the time of zooming from a wide angle end to a telephoto end, the first, third, and fourth lens units move toward the object side. A distance between the first and second lens units increase, a distance between the second and third lens units decrease, a distance between the third lens unit and the fourth lens unit changes, and a distance between the fourth lens unit and the fifth lens unit increases. The zoom lens satisfies the following expressions: 1.54<?4T/?4w<3.0??(1a) 1.0<?3T/?3w<5.0??(2) 1.0<?5T/?5w<3.0??(3).Type: ApplicationFiled: May 29, 2012Publication date: November 29, 2012Inventors: Mayu Miki, Akinori Nishio, Takeshi Hosoya, Minoru Ueda, Akiko Naito, Tomoyuki Satori, Tetsuya Yanai