Patents by Inventor Hideyasu Takato
Hideyasu Takato 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: 20110235192Abstract: The inventive objective lens for endoscopes has independently a zooming function and a focusing function, and is capable of magnified viewing. The objective lens has an angle of view (2?) of 100° or greater, and comprises a positive first group G1, a negative second group G2 and a positive third group G3. The third group G3 comprises a positive first (3-1) subgroup G31 and a positive second (3-2) subgroup G32. A subgroup in at least the second group G2 moves to (1) bring about a change in the focal length of the whole system and (2) correct an image position for movement in association with a focal length change, and one subgroup in the second group G2 and the third group G3 moves to the image side from a longer side toward a shorter side of the working distance (WD) to (3) correct the focal position for movement in association with a working distance change.Type: ApplicationFiled: February 16, 2011Publication date: September 29, 2011Inventors: Tsutomu Uzawa, Hideyasu Takato
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Publication number: 20110211267Abstract: The invention provides a high-performance objective lens that is capable of implementing focusing relative to an object point distance change with no or little angle-of-view change, and is well compatible with a high-pixel type imaging device. The objective optical system comprises, in order from an object side thereof, a first group of negative power, a second group of positive power, an aperture stop, and a third group of positive power. Only the second group moves thereby implementing focusing relative to an object point distance change, with satisfaction of the following conditions (1)-1, (1)-2 and (8): ?f>60??(1)-1 ?n>60??(1)-2 ?1.2<f1/ff<?0.6??(8) where ?f is a maximum half angle of view (°) upon viewing at a far distance object point, ?n is a maximum half angle of view (°) upon close-up viewing, f1 is a focal length of the first lens group, and ff is a focal length of the whole system upon viewing at a far distance. See FIG. 1.Type: ApplicationFiled: October 13, 2010Publication date: September 1, 2011Inventor: Hideyasu Takato
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Patent number: 7982975Abstract: The invention relates to a high-performance imaging optical system that achieves a magnification high enough to be capable of microscopic viewing under an endoscope, and is compatible with high-definition imaging devices. The objective optical system comprises, at least in order from the object side, a positive, first group G1, a second group G2 and a third group G3. In association with an object point change, at least the second group G2 is moved along an optical axis. The objective optical system satisfies a condition with respect to an optical magnification ? upon focusing on the closest range.Type: GrantFiled: May 27, 2009Date of Patent: July 19, 2011Assignee: Olympus Medical Systems Corp.Inventor: Hideyasu Takato
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Patent number: 7978423Abstract: An objective optical system includes, in order from the object side, a first unit having two lenses with negative refracting power and positive refracting power, a stop, and a second unit with positive refracting power to satisfy the following condition: 3.0<fb/fL where fb is the back focus of the objective optical system in air and fL is the focal length of the entire objective optical system.Type: GrantFiled: February 26, 2008Date of Patent: July 12, 2011Assignee: Olympus Medical Systems Corp.Inventor: Hideyasu Takato
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Patent number: 7773318Abstract: An objective optical system for endoscopes is characterized by comprising, in order from its object side, a stop, a first lens and a second lens. The first lens comprises a positive meniscus lens concave on its object side and the second lens comprises a positive lens convex on its object side. The following conditions (1), (2), (3) and (4) are satisfied: ?1.2<r1/f<?0.8??(1) ?1.0<r2/f<?0.6??(2) 2.1<f2/f<4.2??(3) nd1>1.65??(4) where r1 is the radius of curvature of the object-side surface of the first lens, r2 is the radius of curvature of the image-side surface of the first lens, f is the focal length of the whole optical system, f2 is the focal length of the second lens, and nd1 is the d-line refractive index of the first lens.Type: GrantFiled: April 3, 2009Date of Patent: August 10, 2010Assignee: Olympus Medical Systems Corp.Inventor: Hideyasu Takato
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Publication number: 20100142058Abstract: The invention relates to a high-performance imaging optical system that achieves a magnification high enough to be capable of microscopic viewing under an endoscope, and is compatible with high-definition imaging devices. The objective optical system comprises, at least in order from the object side, a positive, first group G1, a second group G2 and a third group G3. In association with an object point change, at least the second group G2 is moved along an optical axis. The objective optical system satisfies a condition with respect to an optical magnification ? upon focusing on the closest range.Type: ApplicationFiled: May 27, 2009Publication date: June 10, 2010Applicant: OLYMPUS MEDICAL SYSTEMS CORP.Inventor: Hideyasu TAKATO
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Publication number: 20100091388Abstract: An objective optical system for endoscopes is characterized by comprising, in order from its object side, a stop, a first lens and a second lens. The first lens comprises a positive meniscus lens concave on its object side and the second lens comprises a positive lens convex on its object side. The following conditions (1), (2), (3) and (4) are satisfied: ?1.2<r1/f<?0.8??(1) ?1.0<r2/f<?0.6??(2) 2.1<f2/f<4.2??(3) nd1>1.65??(4) where r1 is the radius of curvature of the object-side surface of the first lens, r2 is the radius of curvature of the image-side surface of the first lens, f is the focal length of the whole optical system, f2 is the focal length of the second lens, and nd1 is the d-line refractive index of the first lens.Type: ApplicationFiled: April 3, 2009Publication date: April 15, 2010Applicant: OLYMPUS MEDICAL SYSTEMS CORP.Inventor: Hideyasu Takato
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Publication number: 20100046093Abstract: An objective optical system includes, in order from the object side, a first unit having two lenses with negative refracting power and positive refracting power, a stop, and a second unit with positive refracting power to satisfy the following condition: 3.0<fb/fL where fb is the back focus of the objective optical system in air and fL is the focal length of the entire objective optical system.Type: ApplicationFiled: February 26, 2008Publication date: February 25, 2010Applicant: Olympus Medical Systems Corp.Inventor: Hideyasu Takato
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Patent number: 7542670Abstract: An eyepiece includes, in order from the object side, a first lens with positive power, a second lens with positive power, and a third lens with negative power. The first lens is a positive meniscus lens with a convex surface facing the object side, and the eyepiece fails to have a fourth lens. The eyepiece satisfies the following conditions: 0.6<f1/f<1.2 ?2.0<f1-2/f3<?1.0 ?0.45<f3/f<?0.25 where f1 is the focal length of the first lens; f1-2 is a combined focal length of the first and second lenses and is a focal length where a diopter is ?1 m?1 when the focal length of the eyepiece is changed; f3 is the focal length of the third lens; and f is the focal length of the entire system of the eyepiece and is a focal length where a diopter is ?1 m?1 when the focal length of the eyepiece is changed.Type: GrantFiled: June 18, 2008Date of Patent: June 2, 2009Assignee: Olympus CorporationInventor: Hideyasu Takato
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Publication number: 20090088601Abstract: An endoscope has an insertion portion, a contact portion, an observation portion and a marking portion. The insertion portion can be inserted into a body cavity. The contact portion is provided at a distal end portion of the insertion portion. The contact portion provided at the distal end portion can be in contact with a subject. The observation portion is provided at the contact portion. The marking portion is provided at the contact portion. The marking portion applies a marker to the subject with which the contact portion is in contact.Type: ApplicationFiled: November 25, 2008Publication date: April 2, 2009Inventors: Nobuyuki Doguchi, Hironobu Ichimura, Hideyasu Takato, Azusa Noguchi, Kazuhiro Gono, Kiyoshi Miyake
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Patent number: 7511892Abstract: There is provided a compact image-acquisition optical system which is capable of observing from normal observation to microscopic observation with a single image-acquisition optical system, whose overall length is short, and whose lens outer diameter is small. The invention provides an image-acquisition optical system comprising a plurality of lens groups, wherein, by moving at least one of the plurality of lens groups on the optical axis, it is possible to change a state from a normal observation state (wide-angle end) to a close-up magnified-observation state (telephoto end), and wherein the magnification of the image-acquisition optical system at the telephoto end satisfies ?TELE<?2.0.Type: GrantFiled: March 26, 2007Date of Patent: March 31, 2009Assignee: Olympus Medical Systems Corp.Inventor: Hideyasu Takato
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Publication number: 20090082626Abstract: An endoscope has an insertion portion, an abutment portion, an increasing device and an observation portion. The insertion portion is an insertion portion which can be inserted into a subject. The abutment portion is provided at a distal end portion of the insertion portion. The abutment portion provided at the distal end portion can contact with the subject. The increasing device increases the abutment area of the abutment portion. The observation portion performs observation of the subject on the abutment portion provided at the distal end portion and having been increased by the increasing device, or performs observation of the subject spaced by a predetermined distance by the increased abutment portion.Type: ApplicationFiled: November 25, 2008Publication date: March 26, 2009Inventors: Hironobu Ichimura, Hideyasu Takato, Azusa Noguchi, Kiyoshi Miyake, Nobuyuki Doguchi, Kazuhiro Gono
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Patent number: 7499226Abstract: A magnifying optical system for endoscope which can be set at least in a usual observing condition (at a wide position) and a condition for observing a magnified image of an object at a short distance (at a tele position) by moving any of one of lens units, and is configured so as to satisfy a condition mentioned below, thereby providing a sufficient observation depth in each observing condition: f(W)/F(T)>0.93.Type: GrantFiled: February 23, 2007Date of Patent: March 3, 2009Assignee: Olympus Medical Systems Corp.Inventor: Hideyasu Takato
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Publication number: 20090051764Abstract: An endoscope system has a light source apparatus and an endoscope including an illumination optical system and an objective optical system. At least the objective optical system of the endoscope is provided with an adjustable diaphragm, and in a light path in one of the light source apparatus, the illumination optical system, and the objective optical system, an insertable/retractable filter for observation for special light is provided. The adjustable diaphragm performs a closing operation or an opening operation only when the filter for observation for special light is inserted into the light path.Type: ApplicationFiled: October 20, 2008Publication date: February 26, 2009Applicants: OLYMPUS MEDICAL SYSTEMS CORP., OLYMPUS CORPORATIONInventors: Hiroshi ISHII, Seiji IWASAKI, Masahiro KAWAUCHI, Hideaki ISHIHARA, Susumu TAKAHASHI, Shinichi NAKAMURA, Azusa NOGUCHI, Hideyasu TAKATO, Tsutomu SASAMOTO
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Publication number: 20080267609Abstract: An eyepiece includes, in order from the object side, a first lens with positive power, a second lens with positive power, and a third lens with negative power. The first lens is a positive meniscus lens with a convex surface facing the object side, and the eyepiece fails to have a fourth lens. The eyepiece satisfies the following conditions: 0.6<f1/f<1.2 ?2.0<f1-2/f3<?1.0 ?0.45<f3/f<?0.25 where f1 is the focal length of the first lens; f1-2 is a combined focal length of the first and second lenses and is a focal length where a diopter is ?1 m?1 when the focal length of the eyepiece is changed; f3 is the focal length of the third lens; and f is the focal length of the entire system of the eyepiece and is a focal length where a diopter is ?1 m?1 when the focal length of the eyepiece is changed.Type: ApplicationFiled: June 18, 2008Publication date: October 30, 2008Inventor: Hideyasu Takato
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Patent number: 7391968Abstract: An eyepiece includes, in order from the object side, a first lens with positive power, a second lens with positive power, and a third lens with negative power. The first lens is a positive meniscus lens with a convex surface facing the object side, and the eyepiece fails to have a fourth lens. The eyepiece satisfies the following conditions: 0.6<f1/f<1.2 ?2.0<f1-2/f3<?1.0 ?0.45<f3/f<?0.25 where f1 is the focal length of the first lens; f1-2 is a combined focal length of the first and second lenses and is a focal length where a diopter is ?1 m?1 when the focal length of the eyepiece is changed; f3 is the focal length of the third lens; and f is the focal length of the entire system of the eyepiece and is a focal length where a diopter is ?1 m?1 when the focal length of the eyepiece is changed.Type: GrantFiled: July 20, 2005Date of Patent: June 24, 2008Assignee: Olympus CorporationInventor: Hideyasu Takato
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Publication number: 20070258150Abstract: There is provided a compact image-acquisition optical system which is capable of observing from normal observation to microscopic observation with a single image-acquisition optical system, whose overall length is short, and whose lens outer diameter is small. The invention provides an image-acquisition optical system comprising a plurality of lens groups, wherein, by moving at least one of the plurality of lens groups on the optical axis, it is possible to change a state from a normal observation state (wide-angle end) to a close-up magnified-observation state (telephoto end), and wherein the magnification of the image-acquisition optical system at the telephoto end satisfies ?TELE<?2.0.Type: ApplicationFiled: March 26, 2007Publication date: November 8, 2007Inventor: Hideyasu Takato
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Publication number: 20070206293Abstract: A magnifying optical system for endoscope which can be set at least in a usual observing condition (at a wide position) and a condition for observing a magnified image of an object at a short distance (at a tele position) by moving any of one of lens units, and is configured so as to satisfy a condition mentioned below, thereby providing a sufficient observation depth in each observing condition: f(W)/F(T)>0.Type: ApplicationFiled: February 23, 2007Publication date: September 6, 2007Inventor: Hideyasu Takato
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Patent number: 7260322Abstract: A camera system according to this invention comprises an interchangeable lens unit, an intermediate adapter, and a camera body unit. An AF sensor detects the defocus amount of the interchangeable lens unit. The interchangeable lens unit incorporates a data storage section. The data storage section stores first AF correction data and second AF correction data. The first AF correction data is determined by the optical characteristic of the interchangeable lens and associated with the type of the light source illuminating the object of photography. The second AF correction data is determined by the optical characteristic of a system composed of the interchangeable lens and the intermediate adapter and associated with the type of the light source illuminating the object of photography.Type: GrantFiled: January 18, 2005Date of Patent: August 21, 2007Assignee: Olympus CorporationInventors: Masataka Ide, Hideyasu Takato
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Publication number: 20060024044Abstract: An eyepiece includes, in order from the object side, a first lens with positive power, a second lens with positive power, and a third lens with negative power. The first lens is a positive meniscus lens with a convex surface facing the object side, and the eyepiece fails to have a fourth lens. The eyepiece satisfies the following conditions: 0.6<f1/f<1.2 ?2.0<f1-2/f3<?1.0 ?0.45<f3/f<?0.25 where f1 is the focal length of the first lens; f1-2 is a combined focal length of the first and second lenses and is a focal length where a diopter is ?1 m?1 when the focal length of the eyepiece is changed; f3 is the focal length of the third lens; and f is the focal length of the entire system of the eyepiece and is a focal length where a diopter is ?1 m?1 when the focal length of the eyepiece is changed.Type: ApplicationFiled: July 20, 2005Publication date: February 2, 2006Inventor: Hideyasu Takato