Patents by Inventor Takakazu Bito
Takakazu Bito 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: 20110058068Abstract: A zoom lens system of the present invention has a plurality of lens units each composed of at least one lens element and, in order from the object side to the image side, comprises: a first lens unit having negative optical power and composed of two lens elements; a second lens unit having positive optical power; and a third lens unit having positive optical power, wherein in zooming, at least the first lens unit and the second lens unit move along an optical axis, on the image side relative to the second lens unit, an aperture diaphragm is arranged that moves along the optical axis integrally with the second lens unit during zooming, the second lens unit moves in a direction perpendicular to the optical axis, and the condition is satisfied: 1.00<(1?m2W)×m3W<1.50 where, Z=fT/fW>4.Type: ApplicationFiled: January 21, 2009Publication date: March 10, 2011Applicant: PANASONIC CORPORATIONInventors: Takakazu Bito, Keiki Yoshitsugu
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Publication number: 20100328500Abstract: A zoom lens system of the present invention has a plurality of lens units each composed of at least one lens element and, in order from the object side to the image side, comprises: a first lens unit having negative optical power and composed of two lens elements; a second lens unit having positive optical power; and a third lens unit having positive optical power, wherein in zooming from a wide-angle limit to a telephoto limit during image taking, the individual lens units are moved along an optical axis such that an interval between the first lens unit and the second lens unit should decrease and that an interval between the second lens unit and the third lens unit should increase, so that magnification change is achieved, and wherein on the image side relative to the second lens unit, an aperture diaphragm is arranged that moves along the optical axis integrally with the second lens unit during zooming.Type: ApplicationFiled: January 21, 2009Publication date: December 30, 2010Applicant: PANASONIC CORPORATIONInventors: Keiki Yoshitsugu, Takakazu Bito
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Publication number: 20100315538Abstract: A zoom lens system of the present invention has a plurality of lens units each composed of at least one lens element and, in order from the object side to the image side, comprises: a first lens unit having negative optical power and composed of two lens elements; a second lens unit having positive optical power; and a third lens unit having positive optical power, wherein in zooming, the lens units are moved such that an interval between the first lens unit and the second lens unit should decrease and that an interval between the second lens unit and the third lens unit should increase, so that magnification change is achieved, and wherein the condition is satisfied: 1.5<LT/(Ir×Z)<2.6 where, Z=fT/fW>4.Type: ApplicationFiled: January 21, 2009Publication date: December 16, 2010Applicant: PANASONIC CORPORATIONInventors: Keiki Yoshitsugu, Takakazu Bito
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Publication number: 20100309339Abstract: A zoom lens system of the present invention has a plurality of lens units each composed of at least one lens element and, in order from the object side to the image side, comprises: a first lens unit having negative optical power and composed of two lens elements; a second lens unit having positive optical power; and a third lens unit having positive optical power, wherein in zooming, the lens units are moved such that an interval between the first lens unit and the second lens unit should decrease and that an interval between the second lens unit and the third lens unit should increase, so that magnification change is achieved, wherein the first lens unit is, in order from the object side to the image side, composed of a first lens element having negative optical power and a second lens element having positive optical power, and wherein the condition is satisfied: 0.50<fL2/fT<1.00 where, Z=fT/fW>4.Type: ApplicationFiled: January 21, 2009Publication date: December 9, 2010Applicant: PANASONIC CORPORATIONInventors: Keiki Yoshitsugu, Takakazu Bito
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Publication number: 20100309563Abstract: A zoom lens system of the present invention has a plurality of lens units each composed of at least one lens element and, in order from the object side to the image side, comprises: a first lens unit having negative optical power and composed of two lens elements; a second lens unit having positive optical power; and a third lens unit having positive optical power, wherein in zooming, the lens units are moved such that an interval between the first lens unit and the second lens unit should decrease and that an interval between the second lens unit and the third lens unit should increase, so that magnification change is achieved, and wherein the condition is satisfied: 0.10<D2/(Ir×Z2)<0.30 where, Z=fT/fW>4.Type: ApplicationFiled: January 21, 2009Publication date: December 9, 2010Applicant: PANASONIC CORPORATIONInventors: Keiki Yoshitsugu, Takakazu Bito
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Publication number: 20100309338Abstract: A zoom lens system of the present invention has a plurality of lens units each composed of at least one lens element and, in order from the object side to the image side, comprises: a first lens unit having negative optical power and composed of two lens elements; a second lens unit having positive optical power; and a third lens unit having positive optical power, wherein in zooming, at least the first lens unit and the second lens unit move along an optical axis, on the image side relative to the second lens unit, an aperture diaphragm is arranged that moves along the optical axis integrally with the second lens unit during zooming, the second lens unit is, in order from the object side to the image side, composed of a first cemented lens element by cementing two lens elements and a second cemented lens element by cementing two lens elements, and the condition is satisfied: 2.00<fG2a/fG2b<3.00 where, fG2a, fG2b: focal lengths of the first and second cemented lens elements.Type: ApplicationFiled: January 21, 2009Publication date: December 9, 2010Applicant: PANASONIC CORPORATIONInventors: Keiki Yoshitsugu, Takakazu Bito
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Publication number: 20100309564Abstract: A zoom lens system of the present invention has a plurality of lens units each composed of at least one lens element and, in order from the object side to the image side, comprises: a first lens unit having negative optical power and composed of two lens elements; a second lens unit having positive optical power; and a third lens unit having positive optical power, wherein in zooming, the lens units are moved such that an interval between the first lens unit and the second lens unit should decrease and that an interval between the second lens unit and the third lens unit should increase, so that magnification change is achieved, and wherein the condition is satisfied: 2.50<tan (?W)×Z<6.00 where, Z=fT/fW>4.0, ?W>35, fT, fW: focal lengths of the entire system at a telephoto limit, a wide-angle limit, ?W: a half value of maximum view angle at a wide-angle limit.Type: ApplicationFiled: January 21, 2009Publication date: December 9, 2010Applicant: PANASONIC CORPORATIONInventors: Takakazu Bito, Keiki Yoshitsugu
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Patent number: 7791801Abstract: A zoom lens system comprising a plurality of lens units each composed of at least one lens element, wherein an interval between at least any two lens units is changed so that an optical image is formed with a continuously variable magnification, the zoom lens system comprises a first lens unit having positive power, a second lens unit that includes a lens element having a reflecting surface and has negative power and subsequent lens units including at least one lens unit having positive power, and the condition: 0.50<(C?S)/H<1.00(C=?(2R·dR?dR2), S is a sag of the image side surface of the most object side lens element in the second lens unit at height H, H is one-half of an optical axial thickness of the lens element having a reflecting surface, R is a radius of curvature of the image side surface, and dR is an interval between the most object side lens element and the lens element having a reflecting surface) is satisfied.Type: GrantFiled: June 26, 2009Date of Patent: September 7, 2010Assignee: Panasonic CorporationInventors: Keiki Yoshitsugu, Takakazu Bito
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Publication number: 20100171850Abstract: A zoom lens system, in order from an object side to an image side, comprising a first lens unit of positive power, a second lens unit of negative power, a third lens unit of positive power, and a fourth lens unit of positive power, wherein the first lens unit is composed of three or fewer lens elements, wherein the second lens unit is composed of three lens elements, wherein in zooming, the first to the fourth lens units are moved individually along an optical axis such that air spaces should vary, so that variable magnification is achieved, and wherein the conditions are satisfied: 5.50?fG1/fW?7.92, ?W?35 and fT/fW?10 (fG1 is a composite focal length of the first lens unit, ?W is a half view angle at a wide-angle limit, and fT and fW are focal lengths of the entire system respectively at a telephoto limit and at a wide-angle limit), an imaging device and a camera are provided.Type: ApplicationFiled: January 5, 2010Publication date: July 8, 2010Applicant: PANASONIC CORPORATIONInventors: Yasunori Tohchi, Yoshiaki Kurioka, Takakazu Bito
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Publication number: 20100172031Abstract: A zoom lens system, in order from an object side to an image side, comprising a first lens unit of positive power, a second lens unit of negative power, a third lens unit of positive power, and a fourth lens unit of positive power, wherein the first lens unit is composed of three or fewer lens elements, wherein the second lens unit is composed of three lens elements, wherein in zooming, the first to the fourth lens units are moved individually along an optical axis such that air spaces should vary, so that variable magnification is achieved, and wherein the conditions are satisfied: 2.00?D/fW?4.68, ?W?35 and fT/fW?10 (D is a total of an optical axial thickness of each lens unit, ?W is a half view angle at a wide-angle limit, and fT and fW are focal lengths of the entire system respectively at a telephoto limit and at a wide-angle limit), an imaging device and a camera are provided.Type: ApplicationFiled: January 5, 2010Publication date: July 8, 2010Applicant: PANASONIC CORPORATIONInventors: Yasunori Tohchi, Yoshiaki Kurioka, Takakazu Bito
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Publication number: 20100171849Abstract: A zoom lens system, in order from an object side to an image side, comprising a first lens unit of positive power, a second lens unit of negative power, a third lens unit of positive power, and a fourth lens unit of positive power, wherein the first lens unit is composed of three or fewer lens elements, wherein the second lens unit is composed of three lens elements, wherein in zooming, the first to the fourth lens units are moved individually along an optical axis such that air spaces should vary, so that variable magnification is achieved, and wherein the conditions are satisfied: tan 2?W×m2W??1.78, tan 2?W×|fG2|/fG1?1.24, ?W?37 and fT/fW?10 (m2W is a lateral magnification of the second lens unit at a wide-angle limit, fG1 and fG2 are composite focal lengths of the first and the second lens units, ?W is a half view angle at a wide-angle limit, and fT and fW are focal lengths of the entire system respectively at a telephoto limit and at a wide-angle limit), an imaging device and a camera are provided.Type: ApplicationFiled: January 5, 2010Publication date: July 8, 2010Applicant: PANASONIC CORPORATIONInventors: Yasunori Tohchi, Yoshiaki Kurioka, Takakazu Bito
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Publication number: 20100097497Abstract: An object is to provide: a zoom lens system that has a reduced overall length, a high resolution, and a variable magnification ratio as high as 9 or greater and that is satisfactorily adaptable for wide-angle image taking where the view angle at a wide-angle limit is 70° or greater; an imaging device employing this zoom lens system; and a thin and compact camera. The zoom lens system has a plurality of lens units each consisting of at least one lens element, and, in order from the object side to the image side, comprises a first lens unit having positive optical power, a second lens unit having negative optical power, a third lens unit having positive optical power, a fourth lens unit and a fifth lens unit. In zooming from a wide-angle limit to a telephoto limit at the time of image taking, at least the first lens unit and the second lens unit move in an optical axis direction, while the fourth lens unit and the fifth lens unit are each consists of one lens element.Type: ApplicationFiled: December 16, 2009Publication date: April 22, 2010Applicant: Panasonic CorporationInventors: Takakazu BITO, Keiki YOSHITSUGU, Shinji YAMAGUCHI
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Publication number: 20100097496Abstract: An object is to provide: a zoom lens system that has a reduced overall length, a high resolution, and a variable magnification ratio as high as 9 or greater and that is satisfactorily adaptable for wide-angle image taking where the view angle at a wide-angle limit is 70° or greater; an imaging device employing this zoom lens system; and a thin and compact camera. The zoom lens system has a plurality of lens units each consisting of at least one lens element, and, in order from the object side to the image side, comprises a first lens unit having positive optical power, a second lens unit having negative optical power, a third lens unit having positive optical power, a fourth lens unit and a fifth lens unit. In zooming from a wide-angle limit to a telephoto limit at the time of image taking, at least the first lens unit and the second lens unit move in an optical axis direction, while the fourth lens unit and the fifth lens unit are each consists of one lens element.Type: ApplicationFiled: December 16, 2009Publication date: April 22, 2010Applicant: Panasonic CorporationInventors: Takakazu BITO, Keiki Yoshitsugu, Shinji Yamaguchi
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Patent number: 7692863Abstract: A zoom lens system comprising a plurality of lens units each composed of at least one lens element, wherein an interval between at least any two lens units among the lens units is changed so that an optical image of an object is formed with a continuously variable magnification, a first lens unit arranged on the most object side among the lens units includes a lens element having a reflecting surface for bending a light beam from the object, and any one of the lens units, any one of the lens elements, or alternatively a plurality of adjacent lens elements that constitute one lens unit move in a direction perpendicular to an optical axis; an imaging device including the zoom lens system; and a camera employing the imaging device.Type: GrantFiled: October 16, 2008Date of Patent: April 6, 2010Assignee: Panasonic CorporationInventors: Takakazu Bito, Keiki Yoshitsugu
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Patent number: 7684117Abstract: A zoom lens system comprising a plurality of lens units each composed of at least one lens element, wherein an interval between at least any two lens units among the lens units is changed so that an optical image of an object is formed with a continuously variable magnification, a first lens unit arranged on the most object side among the lens units includes a lens element having a reflecting surface for bending a light beam from the object, and any one of the lens units, any one of the lens elements, or alternatively a plurality of adjacent lens elements that constitute one lens unit move in a direction perpendicular to an optical axis; an imaging device including the zoom lens system; and a camera employing the imaging device.Type: GrantFiled: October 16, 2008Date of Patent: March 23, 2010Assignee: Panasonic CorporationInventors: Takakazu Bito, Keiki Yoshitsugu
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Patent number: 7656589Abstract: An object is to provide: a zoom lens system that has a reduced overall length, a high resolution, and a variable magnification ratio as high as 9 or greater and that is satisfactorily adaptable for wide-angle image taking where the view angle at a wide-angle limit is 70° or greater; an imaging device employing this zoom lens system; and a thin and compact camera. The zoom lens system has a plurality of lens units each consisting of at least one lens element, and, in order from the object side to the image side, comprises a first lens unit having positive optical power, a second lens unit having negative optical power, a third lens unit having positive optical power, a fourth lens unit and a fifth lens unit. In zooming from a wide-angle limit to a telephoto limit at the time of image taking, at least the first lens unit and the second lens unit move in an optical axis direction, while the fourth lens unit and the fifth lens unit each consists of one lens element.Type: GrantFiled: January 22, 2008Date of Patent: February 2, 2010Assignee: Panasonic CorporationInventors: Takakazu Bito, Keiki Yoshitsugu, Shinji Yamaguchi
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Patent number: 7626766Abstract: A zoom lens system comprising a plurality of lens units each composed of at least one lens element, wherein an interval between at least any two lens units is changed so that an optical image is formed with a continuously variable magnification, the zoom lens system comprises a first lens unit having positive power, a second lens unit that includes a lens element having a reflecting surface and has negative power and subsequent lens units including at least one lens unit having positive power, and the condition: 0.50<(C?S)/H<1.00(C=?{square root over ( )}(2R·dR?dR2), S is a sag of the image side surface of the most object side lens element in the second lens unit at height H, H is one-half of an optical axial thickness of the lens element having a reflecting surface, R is a radius of curvature of the image side surface, and dR is an interval between the most object side lens element and the lens element having a reflecting surface) is satisfied.Type: GrantFiled: October 31, 2007Date of Patent: December 1, 2009Assignee: Panasonic CorporationInventors: Keiki Yoshitsugu, Takakazu Bito
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Publication number: 20090262426Abstract: A zoom lens system comprising a plurality of lens units each composed of at least one lens element, wherein an interval between at least any two lens units is changed so that an optical image is formed with a continuously variable magnification, the zoom lens system comprises a first lens unit having positive power, a second lens unit that includes a lens element having a reflecting surface and has negative power and subsequent lens units including at least one lens unit having positive power, and the condition: 0.50<(C?S)/H<1.00(C=?{square root over ( )}(2R·dR?dR2), S is a sag of the image side surface of the most object side lens element in the second lens unit at height H, H is one-half of an optical axial thickness of the lens element having a reflecting surface, R is a radius of curvature of the image side surface, and dR is an interval between the most object side lens element and the lens element having a reflecting surface) is satisfied.Type: ApplicationFiled: June 26, 2009Publication date: October 22, 2009Applicant: PANASONIC CORPORATIONInventors: Keiki YOSHITSUGU, Takakazu Bito
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Patent number: 7567390Abstract: A zoom lens system comprising a plurality of lens units each composed of at least one lens element, wherein an interval between at least any two lens units is changed so that an optical image is formed with a continuously variable magnification, any one of the lens units includes a lens element having a reflecting surface for bending a light beam from an object, and any one of the lens units, any one of the lens elements, or a plurality of adjacent lens elements that constitute one lens unit move in a direction perpendicular to an optical axis, an imaging device including the zoom lens system, and a camera employing the imaging device.Type: GrantFiled: February 13, 2007Date of Patent: July 28, 2009Assignee: Panasonic CorporationInventors: Keiki Yoshitsugu, Takakazu Bito
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Publication number: 20090141350Abstract: A zoom lens system comprising a plurality of lens units each composed of at least one lens element, wherein an interval between at least any two lens units among the lens units is changed so that an optical image of an object is formed with a continuously variable magnification, a first lens unit arranged on the most object side among the lens units includes a lens element having a reflecting surface for bending a light beam from the object, and any one of the lens units, any one of the lens elements, or alternatively a plurality of adjacent lens elements that constitute one lens unit move in a direction perpendicular to an optical axis; an imaging device including the zoom lens system; and a camera employing the imaging device.Type: ApplicationFiled: October 16, 2008Publication date: June 4, 2009Applicant: PANASONIC CORPORATIONInventors: Takakazu BITO, Keiki YOSHITSUGU