Patents by Inventor Hideki Kai
Hideki Kai 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: 11513316Abstract: A fixed focal length imaging optical system includes a first lens group having positive power, a second lens group having positive power, and a third lens group having negative power in order from an object side toward an image side. Upon focusing, the second lens group moves along an optical axis, and the first lens group and the third lens group do not move. The present disclosure provides the fixed focal length imaging optical system capable of favorably correcting various aberrations such as spherical aberration, astigmatism, and distortion, and an imaging device and a camera system each of which includes the fixed focal length imaging optical system.Type: GrantFiled: July 2, 2018Date of Patent: November 29, 2022Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Hideki Kai, Yasunori Touchi
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Publication number: 20220118746Abstract: A multilayer film, including: a barrier layer in which an unstretched first film layer containing a first resin, and an unstretched second film layer containing a second resin different from the first resin are alternately and repeatedly laminated; a pair of unstretched first outer layers sandwiching the barrier layer; and a pair of unstretched second outer layers sandwiching the pair of unstretched first outer layers, wherein the average thickness per layer of the first film layers is 10 to 1,000 nm, and the lamination number of the first film layers in the barrier layer is in the range of 50 to 5,000.Type: ApplicationFiled: December 28, 2021Publication date: April 21, 2022Applicant: SUMITOMO BAKELITE CO., LTD.Inventor: Hideki KAI
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Publication number: 20210107260Abstract: A multilayer film, including: a barrier layer in which an unstretched first film layer containing a first resin, and an unstretched second film layer containing a second resin different from the first resin are alternately and repeatedly laminated; a pair of unstretched first outer layers sandwiching the barrier layer; and a pair of unstretched second outer layers sandwiching the pair of unstretched first outer layers, wherein the average thickness per layer of the first film layers is 10 to 1,000 nm, and the lamination number of the first film layers in the barrier layer is in the range of 50 to 5,000.Type: ApplicationFiled: March 22, 2018Publication date: April 15, 2021Applicant: SUMITOMO BAKELITE CO., LTD.Inventor: Hideki KAI
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Publication number: 20200341238Abstract: A fixed focal length imaging optical system includes a first lens group having positive power, a second lens group having positive power, and a third lens group having negative power in order from an object side toward an image side. Upon focusing, the second lens group moves along an optical axis, and the first lens group and the third lens group do not move. The present disclosure provides the fixed focal length imaging optical system capable of favorably correcting various aberrations such as spherical aberration, astigmatism, and distortion, and an imaging device and a camera system each of which includes the fixed focal length imaging optical system.Type: ApplicationFiled: July 2, 2018Publication date: October 29, 2020Inventor: HIDEKI KAI
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Publication number: 20160195691Abstract: An imaging optical system, in order from an object side to an image side, includes: a first lens unit having positive optical power; and a second lens unit. In focusing from an infinity in-focus condition to a close-object in-focus condition, the first lens unit moves along an optical axis, and the second lens unit is fixed with respect to an image surface. The imaging optical system is compact, sufficiently suppresses occurrence of various aberrations, has high resolution from the infinity in-focus condition to the close-object in-focus condition, is bright and highly efficient, and is suitable for wide-angle photographing.Type: ApplicationFiled: March 15, 2016Publication date: July 7, 2016Inventors: Takakazu BITO, Shunichiro YOSHINAGA, Hideki KAI, Tsutomu IWASHITA, Yoshiaki KURIOKA, Aya TOMITA, Hisayuki II
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Patent number: 9291442Abstract: A contour measuring apparatus includes: an arm including a stylus in a distal end and being swingable with respect to a cabinet; an attitude change mechanism configured to change an attitude of the arm within a swing range; a stopper configured to make contact with the arm when the arm moves nearer to an installation part of an object to be measured within the swing range; and a controller configured to operate the attitude change mechanism based on a power-off command and return the arm to a mechanical limit position in which the arm makes contact with the stopper.Type: GrantFiled: March 20, 2014Date of Patent: March 22, 2016Assignee: MITUTOYO CORPORATIONInventors: Hiroyuki Hidaka, Mitsuhisa Nakano, Hideki Kai
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Publication number: 20150097989Abstract: A zoom lens system comprising: a negative first lens unit; a positive second lens unit; a negative third lens unit; and a positive fourth lens unit, wherein in zooming, the first lens unit moves with locus of a convex to the image side and the second lens unit moves to the object side, and the conditions: 0<(DaW?DaT)/TLW<0.26 and 0<TG2G/TGa11<0.4 (DaW: optical axial interval between the first and second lens units at the wide-angle limit, DaT: optical axial interval between the first and second lens units at the telephoto limit, TLW: overall length of the lens system at the wide-angle limit, TG2G: optical axial thickness of the second lens unit, TGall: sum of optical axial thicknesses of the respective lens units) are satisfied.Type: ApplicationFiled: March 27, 2014Publication date: April 9, 2015Applicant: Panasonic CorporationInventors: Hideki KAI, Takahiro KITADA, Takuya IMAOKA
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Patent number: 8922907Abstract: A variable focal length lens system including: a first lens group having positive power; a second lens group having negative power; a third lens group having positive power; and a fourth lens group having positive power sequentially arranged from a side where an object is present. An aperture stop is disposed between the second and third lens groups. The first to fourth lens groups are so moved that the distance between the first and second lens groups increases, the distance between the second and third lens groups decreases, and the distance between the third and fourth lens groups decreases when a lens position setting is changed from a wide angle end state to a telescopic end state. The third lens group includes a negative lens and a positive lens disposed on the image side thereof. The variable focal length lens system satisfies the conditional expression, 0.35<f3/|f3a|<0.8.Type: GrantFiled: August 10, 2012Date of Patent: December 30, 2014Assignee: Sony CorporationInventors: Motoyuki Ohtake, Hideki Kai, Hiroyuki Matsumoto
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Publication number: 20140283402Abstract: A contour measuring apparatus includes: an arm including a stylus in a distal end and being swingable with respect to a cabinet; an attitude change mechanism configured to change an attitude of the arm within a swing range; a stopper configured to make contact with the arm when the arm moves nearer to an installation part of an object to be measured within the swing range; and a controller configured to operate the attitude change mechanism based on a power-off command and return the arm to a mechanical limit position in which the arm makes contact with the stopper.Type: ApplicationFiled: March 20, 2014Publication date: September 25, 2014Applicant: MITUTOYO CORPORATIONInventors: Hiroyuki Hidaka, Mitsuhisa Nakano, Hideki Kai
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Patent number: 8730588Abstract: A zoom lens includes: a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, and a fourth lens group having positive refractive power, the first to fourth lens groups being arranged in order from an object side, in which zooming is performed through varying a distance between adjacent lens groups of the first to fourth lens groups, and the fourth lens group includes a first positive lens, a first negative meniscus lens, and a cemented lens which are arranged in order from the object side, the cemented lens being configured of a second negative meniscus lens with a convex surface facing the object side and a second positive lens.Type: GrantFiled: November 19, 2012Date of Patent: May 20, 2014Assignee: Sony CorporationInventors: Hideki Kai, Syuuji Maki
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Patent number: 8446680Abstract: A zoom lens includes a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, and a fourth lens group having positive refractive power, the first, second, third, and fourth lens groups being arranged in order from an object side, and satisfies conditional expression (1) and conditional expression (2) below, (1) 0.95<|fw12|/fw<1.2 and (2) 140<f1/?t234<150, where, fw12 denotes a synthetic focal length of the first lens group and the second lens group at a wide-angle end, fw denotes a focal length of a whole lens system at the wide-angle end, f1 denotes the focal length of the first lens group, and ?t234 denotes the synthetic magnification of the second lens group, the third lens group, and the fourth lens group at a telephoto end.Type: GrantFiled: April 12, 2012Date of Patent: May 21, 2013Assignee: Sony CorporationInventors: Hideki Kai, Makoto Kanai
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Publication number: 20130057751Abstract: A variable focal length lens system including: a first lens group having positive power; a second lens group having negative power; a third lens group having positive power; and a fourth lens group having positive power sequentially arranged from a side where an object is present. An aperture stop is disposed between the second and third lens groups. The first to fourth lens groups are so moved that the distance between the first and second lens groups increases, the distance between the second and third lens groups decreases, and the distance between the third and fourth lens groups decreases when a lens position setting is changed from a wide angle end state to a telescopic end state. The third lens group includes a negative lens and a positive lens disposed on the image side thereof. The variable focal length lens system satisfies the following conditional expression. 0.35<f3/|f3a|<0.Type: ApplicationFiled: August 10, 2012Publication date: March 7, 2013Applicant: Sony CorporationInventors: Motoyuki Ohtake, Hideki Kai, Hiroyuki Matsumoto
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Publication number: 20120307129Abstract: A zoom lens includes a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, and a fourth lens group having positive refractive power, the first, second, third, and fourth lens groups being arranged in order from an object side, and satisfies conditional expression (1) and conditional expression (2) below, (1) 0.95<|fw12|/fw<1.2 and (2) 140<f1/?t234<150, where, fw12 denotes a synthetic focal length of the first lens group and the second lens group at a wide-angle end, fw denotes a focal length of a whole lens system at the wide-angle end, f1 denotes the focal length of the first lens group, and ?t234 denotes the synthetic magnification of the second lens group, the third lens group, and the fourth lens group at a telephoto end.Type: ApplicationFiled: April 12, 2012Publication date: December 6, 2012Applicant: Sony CorporationInventors: Hideki Kai, Makoto Kanai