Patents by Inventor Kazuyoshi Okada
Kazuyoshi Okada 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: 10437016Abstract: The imaging lens includes, in order from the object side, a first lens group that remains stationary during focusing; a diaphragm; and a positive second lens group that moves to the object side during focusing from a long range to a close range. The first lens group includes, in order from the object side: a negative meniscus lens that has an absolute value of a radius of curvature of an image side surface smaller than that of an object side surface, a negative lens, a positive lens, and a negative lens. The second lens group includes five or less lenses, and includes: a positive Z lens that is formed continuously in order from a most image side; a negative Y lens that has an absolute value of a radius of curvature of an object side surface smaller than that of an image side surface; and a positive X lens.Type: GrantFiled: January 23, 2017Date of Patent: October 8, 2019Assignee: FUJIFILM CorporationInventors: Takashi Kunugise, Kazuyoshi Okada, Michio Cho
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Patent number: 10401593Abstract: The imaging lens includes, in order from the object side, a first lens group that remains stationary during focusing; a diaphragm; and a positive second lens group that moves to the object side during focusing from a long range to a close range. The second lens group includes a positive Z lens that is formed continuously in order from a most image side, a negative Y lens that has an absolute value of a radius of curvature of an object side surface smaller than an absolute value of a radius of curvature of an image side surface, a positive X lens, and a negative W lens that has an absolute value of a radius of curvature of an image side surface smaller than that of an object side surface. The imaging lens satisfies a conditional expression about of the radii of curvature of the X lens and the W lens.Type: GrantFiled: January 23, 2017Date of Patent: September 3, 2019Assignee: FUJIFILM CorporationInventors: Toshihiro Aoi, Takashi Kunugise, Kazuyoshi Okada, Michio Cho
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Publication number: 20190094533Abstract: The imaging lens includes at least one negative lens that satisfies predetermined Conditional Expressions (1) to (3) indicating conditions in which dispersion is relatively low and refractive index is high while having a negative rate of change of the refractive index. A positive lens having a largest Abbe number at the d line among positive lenses included in the imaging lens satisfies predetermined Conditional Expressions (4) and (5).Type: ApplicationFiled: September 17, 2018Publication date: March 28, 2019Applicant: FUJIFILM CorporationInventors: Yukiko NAGATOSHI, Shunsuke MIYAGISHIMA, Kazuyoshi OKADA, Ukyo TOMIOKA, Masaru YONEZAWA, Yasutaka SHIMADA
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Publication number: 20190094495Abstract: The imaging lens includes at least one positive lens that satisfies predetermined conditional expressions (1) to (3) indicating conditions in which dispersion is relatively low and refractive index is high while having a negative rate of change of the refractive index. In a case where a lens that satisfies a conditional expression (4) meaning a low dispersion material is included, the lens that satisfies the conditional expression (4) satisfies a predetermined conditional expression (5).Type: ApplicationFiled: September 14, 2018Publication date: March 28, 2019Applicant: FUJIFILM CorporationInventors: Masaru AMANO, Masao MORI, Taro ASAMI, Kazuyoshi OKADA
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Publication number: 20190086651Abstract: The imaging lens consists of, in order from the object side, a positive first lens group that has a positive refractive power and remains stationary during focusing, and a second lens group that moves toward an image side during focusing from a distant object to a close-range object. The first lens group has, successively in order from a position closest to the image side, a first-b sub-lens group having a positive refractive power, and an aperture stop. The imaging lens satisfies predetermined conditional expressions relating to the first-b sub-lens group, the second lens group, and the like.Type: ApplicationFiled: September 13, 2018Publication date: March 21, 2019Applicant: FUJIFILM CorporationInventors: Kazuyoshi OKADA, Takashi KUNUGISE
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Publication number: 20190086650Abstract: The imaging lens consists of, in order from the object side, a first lens group, an aperture stop, a second lens group having a positive refractive power. During focusing from a distant object to a close-range object, the first lens group remains stationary, and the aperture stop and the second lens group integrally move to the object side. The imaging lens satisfies predetermined conditional expressions relating to a focal length of the whole system, a focal length of the first lens group, a principal point position of the second lens group, a focal length of the second lens group, a back focal length, and the like.Type: ApplicationFiled: September 13, 2018Publication date: March 21, 2019Applicant: FUJIFILM CorporationInventors: Takashi KUNUGISE, Kazuyoshi OKADA
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Patent number: 10156696Abstract: The imaging lens consists of a first lens group G1, an aperture stop St, and a positive second lens group G2, in order from an object side. The first lens group G1 consists of a 1-1st negative meniscus lens L11 with its convex surface toward the object side, a 1-2nd negative lens L12 with its concave surface toward an image side, a 1-3rd positive lens L13 having a biconvex shape, a 1-4th negative meniscus lens L14 with its convex surface toward the object side, and a 1-5th positive lens L15 with its convex surface toward the object side, in order from the object side. Predetermined conditional expressions are satisfied which relate to a focal length of the whole system, a focal length of the first lens group G1, and a distance on an optical axis between the 1-4th negative meniscus lens L14 and the 1-5th positive lens L15.Type: GrantFiled: September 6, 2017Date of Patent: December 18, 2018Assignee: FUJIFILM CorporationInventors: Kazuyoshi Okada, Michio Cho
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Patent number: 10139588Abstract: The imaging lens includes a first lens group fixed during focusing and a positive second lens group moving to an object side during focusing from a long-distance object to a short-distance object, in order from a side closest to the object. The field curvature is adjusted by moving the first lens group or a sub-lens group within the first lens group including a lens closest to the object side, as an adjustment group. A stop fixed during the adjustment of the field curvature is disposed closer to an image side than the adjustment group. Conditional expressions relating to the focal length of the whole system, the focal length of the adjustment group, and the height of a paraxial on-axis light ray in the adjustment group are satisfied.Type: GrantFiled: September 6, 2017Date of Patent: November 27, 2018Assignee: FUJIFILM CorporationInventors: Kazuyoshi Okada, Takashi Kunugise, Yasunobu Kishine, Michio Cho
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Publication number: 20180088302Abstract: The imaging lens consists of a first lens group G1, an aperture stop St, and a positive second lens group G2, in order from an object side. The first lens group G1 consists of a 1-1st negative meniscus lens L11 with its convex surface toward the object side, a 1-2nd negative lens L12 with its concave surface toward an image side, a 1-3rd positive lens L13 having a biconvex shape, a 1-4th negative meniscus lens L14 with its convex surface toward the object side, and a 1-5th positive lens L15 with its convex surface toward the object side, in order from the object side. Predetermined conditional expressions are satisfied which relate to a focal length of the whole system, a focal length of the first lens group G1, and a distance on an optical axis between the 1-4th negative meniscus lens L14 and the 1-5th positive lens L15.Type: ApplicationFiled: September 6, 2017Publication date: March 29, 2018Applicant: FUJIFILM CorporationInventors: Kazuyoshi OKADA, Michio CHO
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Publication number: 20180088299Abstract: The imaging lens includes a first lens group fixed during focusing and a positive second lens group moving to an object side during focusing from a long-distance object to a short-distance object, in order from a side closest to the object. The field curvature is adjusted by moving the first lens group or a sub-lens group within the first lens group including a lens closest to the object side, as an adjustment group. A stop fixed during the adjustment of the field curvature is disposed closer to an image side than the adjustment group. Conditional expressions relating to the focal length of the whole system, the focal length of the adjustment group, and the height of a paraxial on-axis light ray in the adjustment group are satisfied.Type: ApplicationFiled: September 6, 2017Publication date: March 29, 2018Applicant: FUJIFILM CorporationInventors: Kazuyoshi OKADA, Takashi KUNUGISE, Yasunobu KISHINE, Michio CHO
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Publication number: 20170242222Abstract: The imaging lens includes, in order from the object side, a first lens group that remains stationary during focusing; a diaphragm; and a positive second lens group that moves to the object side during focusing from a long range to a close range. The second lens group includes a positive Z lens that is formed continuously in order from a most image side, a negative Y lens that has an absolute value of a radius of curvature of an object side surface smaller than an absolute value of a radius of curvature of an image side surface, a positive X lens, and a negative W lens that has an absolute value of a radius of curvature of an image side surface smaller than that of an object side surface. The imaging lens satisfies a conditional expression about of the radii of curvature of the X lens and the W lens.Type: ApplicationFiled: January 23, 2017Publication date: August 24, 2017Applicant: FUJIFILM CorporationInventors: Toshihiro AOI, Takashi KUNUGISE, Kazuyoshi OKADA, Michio CHO
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Publication number: 20170242221Abstract: The imaging lens includes, in order from the object side, a first lens group that remains stationary during focusing; a diaphragm; and a positive second lens group that moves to the object side during focusing from a long range to a close range. The first lens group includes, in order from the object side: a negative meniscus lens that has an absolute value of a radius of curvature of an image side surface smaller than that of an object side surface, a negative lens, a positive lens, and a negative lens. The second lens group includes five or less lenses, and includes: a positive Z lens that is formed continuously in order from a most image side; a negative Y lens that has an absolute value of a radius of curvature of an object side surface smaller than that of an image side surface; and a positive X lens.Type: ApplicationFiled: January 23, 2017Publication date: August 24, 2017Applicant: FUJIFILM CorporationInventors: Takashi KUNUGISE, Kazuyoshi OKADA, Michio CHO
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Patent number: 9645364Abstract: An imaging lens consists of, in order from the object side, a front group having a negative refractive power, a stop, and a rear group having a positive refractive power. The front group consist of a front-group negative lens group that consists of three negative lenses and has a negative refractive power, and a front-group positive lens group that includes one positive lens and one negative lens and has a positive refractive power, where the negative lens is disposed at the most image-side position. The rear group includes two positive lenses and two negative lenses. The imaging lens satisfies condition expression (1): 0.95<?fAn/f<2, where fAn is a focal length of the front-group negative lens group, and f is a focal length of the entire system.Type: GrantFiled: March 15, 2016Date of Patent: May 9, 2017Assignee: FUJIFILM CorporationInventors: Kazuyoshi Okada, Ping Sun
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Publication number: 20160291296Abstract: An imaging lens consists of, in order from the object side, a front group having a negative refractive power, a stop, and a rear group having a positive refractive power. The front group consist of a front-group negative lens group that consists of three negative lenses and has a negative refractive power, and a front-group positive lens group that includes one positive lens and one negative lens and has a positive refractive power, where the negative lens is disposed at the most image-side position. The rear group includes two positive lenses and two negative lenses. The imaging lens satisfies condition expression (1): 0.95<?fAn/f<2, where fAn is a focal length of the front-group negative lens group, and f is a focal length of the entire system.Type: ApplicationFiled: March 15, 2016Publication date: October 6, 2016Applicant: FUJIFILM CorporationInventors: Kazuyoshi OKADA, Ping SUN
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Patent number: 9324502Abstract: Provided is a lithium ion capacitor that can maintain a high capacity retention rate and suppress an increase in internal resistance even after high-load charging-discharging is repeated many times and that has long service life because the occurrence of a short circuit due to precipitation of lithium on the negative electrode is prevented. The lithium ion capacitor comprises a positive electrode, a negative electrode, and an electrolyte solution, the negative electrode including a current collector and electrode layers that contain a negative electrode active material and are formed on front and back surfaces of the current collector, wherein, in the negative electrode, ratios of deviations of respective thicknesses of the electrode layers formed on the front and back surfaces of the current collector from an average of the thicknesses of the electrode layers to the average is ?10 to 10%.Type: GrantFiled: September 9, 2011Date of Patent: April 26, 2016Assignee: JM Energy CorporationInventors: Naoshi Yasuda, Takashi Chiba, Kazuyoshi Okada, Kuniyasu Hiraiwa
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Patent number: 8992894Abstract: An oral stain remover which can remove a stain or a dental plaque effectively without a need of brushing the surface of teeth with a toothbrush or the like, and an oral composition containing the stain remover. An oral stain remover contains a salt of ultraphosphoric acid, and an oral composition contains the oral stain remover.Type: GrantFiled: June 14, 2007Date of Patent: March 31, 2015Assignees: Mandom Corporation, REGENETISS Inc.Inventors: Toshikazu Shiba, Atsushi Saitou, Kazuyoshi Okada, Yoshio Tsujino
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Patent number: 8980786Abstract: The present invention relates to a metal oxide-platinum compound catalyst comprising 5 to 95 parts by weight of a metal oxide and 95 to 5 parts by weight of platinum as the balance. The platinum has a form to reticulately cover at least a part of a particle of the metal oxide. The wires constituting the platinum mesh have an average wire diameter of 5 nm or smaller.Type: GrantFiled: August 8, 2011Date of Patent: March 17, 2015Assignee: Shinshu UniversityInventors: Yasushi Murakami, Wataru Shimizu, Kazuyoshi Okada
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Publication number: 20140038811Abstract: The present invention relates to a metal oxide-platinum compound catalyst comprising 5 to 95 parts by weight of a metal oxide and 95 to 5 parts by weight of platinum as the balance. The platinum has a form to reticulately cover at least a part of a particle of the metal oxide. The wires constituting the platinum mesh have an average wire diameter of 5 nm or smaller.Type: ApplicationFiled: August 8, 2011Publication date: February 6, 2014Applicant: SHINSHU UNIVERSITYInventors: Yasushi Murakami, Wataru Shimizu, Kazuyoshi Okada
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Publication number: 20130208404Abstract: Provided is a lithium ion capacitor that can maintain a high capacity retention rate and suppress an increase in internal resistance even after high-load charging-discharging is repeated many times and that has long service life because the occurrence of a short circuit due to precipitation of lithium on the negative electrode is prevented. The lithium ion capacitor comprises a positive electrode, a negative electrode, and an electrolyte solution, the negative electrode including a current collector and electrode layers that contain a negative electrode active material and are formed on front and back surfaces of the current collector, wherein, in the negative electrode, ratios of deviations of respective thicknesses of the electrode layers formed on the front and back surfaces of the current collector from an average of the thicknesses of the electrode layers to the average is ?10 to 10%.Type: ApplicationFiled: September 9, 2011Publication date: August 15, 2013Applicant: JM Energy CorporationInventors: Naoshi Yasuda, Takashi Chiba, Kazuyoshi Okada, Kuniyasu Hiraiwa
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Publication number: 20090280072Abstract: An oral stain remover which can remove a stain or a dental plaque effectively without a need of brushing the surface of teeth with a toothbrush or the like, and an oral composition containing the stain remover. An oral stain remover contains a salt of ultraphosphoric acid, and an oral composition contains the oral stain remover.Type: ApplicationFiled: June 14, 2007Publication date: November 12, 2009Applicant: MANDOM CORPORATIONInventors: Toshikazu Shiba, Atsushi Saitou, Kazuyoshi Okada, Yoshio Tsujino