Patents by Inventor Masaru Eguchi
Masaru Eguchi 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: 20120062770Abstract: A high zoom-ratio zoom lens system includes a positive first lens group, a negative second lens group, a positive third lens group and a positive fourth lens group. Upon zooming, 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 increases. The first lens group includes a negative lens element, and two positive lens elements. The absolute value of the radius-of-curvature of the image-side surface of the negative lens element within the first lens group is smaller than the absolute value of the radius-of-curvature of the object-side surface of the positive lens element on the object side within the first lens group. The following condition (1) is satisfied: 1.95<n11??(1), wherein n11 designates the refractive index at the d-line of the negative lens element within the first lens group.Type: ApplicationFiled: September 1, 2011Publication date: March 15, 2012Applicant: HOYA CORPORATIONInventor: Masaru EGUCHI
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Publication number: 20120050864Abstract: A high zoom-ratio zoom lens system includes a positive first lens group, a negative second lens group, a positive third lens group and a positive fourth lens group, in that order from the object side. Upon zooming from the short focal length extremity to the long focal length extremity, at least the first through third lens groups move along the optical axis direction in a manner so that the distance between the first lens group and the second lens group increases, the distance between the second lens group and the third lens group decreases, and the distance between the third lens group and the fourth lens group increases, wherein the amount of movement of the first lens group during zooming is larger than that of the third lens group. The lens element which is provided closest to the object side within third lens group has an aspherical surface formed on each side thereof.Type: ApplicationFiled: August 22, 2011Publication date: March 1, 2012Applicant: HOYA CORPORATIONInventor: Masaru EGUCHI
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Patent number: 8105503Abstract: It is intended to provide an aqueous solution of a thermoresponsive polymer, which shows an upper critical solution temperature (UCST) and is capable of maintaining a dissolved state, even if it is stored for a long period of time at a temperature at which a ligand such as an antibody or an antigen is not inactivated. A UCST lowering agent is incorporated in a predetermined amount in an aqueous solution of a thermoresponsive polymer which shows a UCST in a state of containing water, thereby lowering the UCST of the aqueous solution to less than the storage temperature, and the resulting aqueous solution is stored.Type: GrantFiled: May 31, 2011Date of Patent: January 31, 2012Assignee: Chisso CorporationInventors: Masaru Eguchi, Noriyuki Ohnishi
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Publication number: 20110233453Abstract: It is intended to provide an aqueous solution of a thermoresponsive polymer, which shows an upper critical solution temperature (UCST) and is capable of maintaining a dissolved state, even if it is stored for a long period of time at a temperature at which a ligand such as an antibody or an antigen is not inactivated. A UCST lowering agent is incorporated in a predetermined amount in an aqueous solution of a thermoresponsive polymer which shows a UCST in a state of containing water, thereby lowering the UCST of the aqueous solution to less than the storage temperature, and the resulting aqueous solution is stored.Type: ApplicationFiled: May 31, 2011Publication date: September 29, 2011Applicant: CHISSO CORPORATIONInventors: MASARU EGUCHI, NORIYUKI OHNISHI
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Publication number: 20110216424Abstract: A high zoom-ratio zoom lens system includes a positive first lens group, a negative second lens group, a positive third lens group, and a positive fourth lens group, in that order from the object side. Upon zooming from the short to long focal length extremities, at least the first through third lens groups are moved along the optical axis direction, wherein an amount of movement of the first lens group is greater than that of the third lens group. The following conditions (1), (2) and (3) are satisfied: 0.9<FT/F1<2 ??(1), 3<F1/FW<7 ??(2), and ?8<F1/F2<?5 ??(3), wherein FT and FW designate the entire focal length of the zoom lens system at the long and short focal length extremities, respectively; and F1 and F2 designate the focal length of the first and second lens groups, respectively.Type: ApplicationFiled: March 2, 2011Publication date: September 8, 2011Applicant: HOYA CORPORATIONInventor: Masaru EGUCHI
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Publication number: 20110216423Abstract: A high zoom-ratio zoom lens system includes a positive first lens group, a negative second lens group, a positive third lens group, and a positive fourth lens group, in that order from the object side, wherein upon zooming from the short to the long focal length extremities, the first through fourth lens groups are moved along the optical axis direction, wherein an amount of movement of the first lens group is greater than that of the third lens group. The following conditions (1) and (2) are satisfied: 1.4<FT/F1<2.4??(1), and 5<M2T/M2W<10??(2), wherein FT designates the entire focal length at the long focal length extremity, F1 designates the focal length of the first lens group, and M2T and M2W designate the magnification of the second lens group with respect to an object at infinity at the long and short focal length extremities, respectively.Type: ApplicationFiled: March 2, 2011Publication date: September 8, 2011Applicant: HOYA CORPORATIONInventor: Masaru EGUCHI
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Publication number: 20110194190Abstract: A zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group, in this order from the object. Each of the negative first lens group, the positive second lens group and the positive third lens group moves along the optical axis upon zooming. The positive second lens group includes a positive first lens element, a negative second lens element, and a negative third lens element, in this order from the object. The zoom lens system satisfies the following conditions: 2<f2/rb<3??(1) 0.4<f2/f3<0.8??(2) wherein f2 designates the focal length of the positive second lens group; f3 designates the focal length of the positive third lens group; and rb designates the radius of curvature of the image-side surface of the negative third lens element of the positive second lens group.Type: ApplicationFiled: April 15, 2011Publication date: August 11, 2011Applicant: HOYA CORPORATIONInventors: Koichiro HAYAKAWA, Masaru EGUCHI
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Patent number: 7976728Abstract: It is intended to provide an aqueous solution of a thermoresponsive polymer and an aqueous dispersion of a thermoresponsive particle, which show an upper critical solution temperature (UCST) and are capable of maintaining a dissolved state and a dispersed state, respectively, even if they are stored for a long period of time at a temperature at which a ligand such as an antibody or an antigen is not inactivated. A UCST lowering agent is incorporated in a predetermined amount in an aqueous solution of a thermoresponsive polymer which shows a UCST in a state of containing water or an aqueous dispersion of a thermoresponsive particle containing the polymer, thereby lowering the UCST of the aqueous solution or aqueous dispersion to less than the storage temperature, and the resulting aqueous solution or aqueous dispersion is stored.Type: GrantFiled: June 26, 2008Date of Patent: July 12, 2011Assignee: JNC CorporationInventors: Masaru Eguchi, Noriyuki Ohnishi
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Publication number: 20110155947Abstract: A magnetic fine particle comprising a composite of an iron oxide and polyalkyleneimine, wherein a surface of the magnetic fine particle is modified with a temperature-responsive high molecular weight compound, is prepared.Type: ApplicationFiled: September 3, 2009Publication date: June 30, 2011Applicant: CHISSO CORPORATIONInventor: Masaru Eguchi
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Publication number: 20110139719Abstract: The invention provides a magnetic particle which can immobilize the intended substance easily and efficiently; and a method for producing thereof. The invention relates to a magnetic particle, comprising an aggregate which comprises a magnetic substance and a compound having an alkyl group, and a gel layer which covers the aggregate, in which the gel layer has a hydrophilic group.Type: ApplicationFiled: December 7, 2010Publication date: June 16, 2011Applicant: CHISSO CORPORATIONInventor: Masaru Eguchi
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Patent number: 7957071Abstract: A focus adjustment method of a zoom lens system is provided for correcting a focal point shift caused by manufacturing error. The zoom lens system includes three movable lens groups in which at least two of said lens groups are moved to perform zooming to form an image onto an imaging device. In the zoom lens system, a finite number of focal length positions at which a focus adjustment is performed is provided. The lens group closest to the imaging device out of the three lens groups includes a focusing lens group. A position of the focusing lens group is controlled via pulses of a stepping motor. The focus adjustment method includes the combination of performing the above control of the focusing lens group to determine a position of the focusing lens group via pulses of the stepping motor and determining an amount of adjustment of the imaging device.Type: GrantFiled: April 27, 2009Date of Patent: June 7, 2011Assignee: Hoya CorporationInventors: Toshiki Nakamura, Masaru Eguchi
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Patent number: 7952813Abstract: A zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group, in this order from the object. Each of the negative first lens group, the positive second lens group and the positive third lens group moves along the optical axis upon zooming. The positive second lens group includes a positive first lens element, a negative second lens element, and a negative third lens element, in this order from the object. The zoom lens system satisfies the following conditions: 2<f2/rb<3 ??(1) 0.4<f2/f3<0.8 ??(2) wherein f2 designates the focal length of the positive second lens group; f3 designates the focal length of the positive third lens group; and rb designates the radius of curvature of the image-side surface of the negative third lens element of the positive second lens group.Type: GrantFiled: April 9, 2009Date of Patent: May 31, 2011Assignee: Hoya CorporationInventors: Koichiro Hayakawa, Masaru Eguchi
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Publication number: 20100328784Abstract: A zoom lens system includes a positive first lens group, a negative second lens group, a positive third lens group, and a positive fourth lens group, in this order from the object. Upon zooming from the short focal length extremity to the long focal length extremity, all of the first through fourth lens groups move along the optical axis. The zoom lens system satisfies the following condition: 3<T1/F2<4 ??(1) wherein T1 designates the traveling distance of the first lens group upon zooming from the short focal length extremity to the long focal length extremity; and F2 designates the focal length of the second lens group.Type: ApplicationFiled: June 25, 2010Publication date: December 30, 2010Applicant: HOYA CORPORATIONInventor: Masaru EGUCHI
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Patent number: 7847047Abstract: A material which expresses its critical solution temperature even in an aqueous solution containing a buffer or salt, and at the same time, shows small variation width of the critical solution temperature even when concentration of salt or the like contained in water, a buffer liquid or the like is different, interacts with a substance such as a component in the living body and can therefore be used efficiently in the isolation of substances, is provided. A monomer represented by a formula (1) and a thermoresponsive polymer which contains said monomer as a polymerization component.Type: GrantFiled: February 27, 2007Date of Patent: December 7, 2010Assignee: Chisso CorporationInventors: Hirokazu Nagaoka, Noriyuki Ohnishi, Masaru Eguchi
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Patent number: 7830614Abstract: A zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group. Upon zooming from the short focal length extremity to the long focal length extremity, each of the first to third lens groups move along the optical axis. The first lens group includes a negative first sub-lens element, a second sub-lens element having a weak negative refractive power and at least one aspherical surface, and a positive third sub-lens element. The zoom lens system satisfies the condition, 0.5<(ra?rb)/(ra +rb)<1.2??(1), where ra designates the radius of curvature of the object-side surface of the second sub-lens element and rb designates the radius of curvature of the image-side surface of the second sub-lens element.Type: GrantFiled: March 27, 2009Date of Patent: November 9, 2010Assignee: Hoya CorporationInventors: Toshiki Nakamura, Masaru Eguchi
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Patent number: 7808720Abstract: A standard zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group, in this order from the object. Upon zooming from the short focal length extremity to the long focal length extremity, the distance between the negative first lens group and the positive second lens group decreases, and the distance between the positive second lens group and the positive third lens group increases. The most image-side surface of the positive second lens group is a concave surface. The standard zoom lens system satisfies the following condition: 0.15<Rs/fT<0.18??(1) wherein Rs designates the radius of curvature of the most image-side surface of the positive second lens group (Rs>0); and fT designates the focal length of the entire standard zoom lens system at the long focal length extremity when an object at an infinite distance is in an in-focus state.Type: GrantFiled: December 27, 2007Date of Patent: October 5, 2010Assignee: Hoya CorporationInventor: Masaru Eguchi
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Patent number: 7791819Abstract: A zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group, in this order from the object. Upon zooming from the short focal length extremity to the long focal length extremity, the distance between the negative first lens group and the positive second lens group decreases, and the distance between the positive second lens group and the positive third lens group increases. The negative first lens group includes a negative first lens element, a negative second lens element having a weaker negative refractive power, and a positive third lens element, in this order from the object. The second lens element of the negative first lens group satisfies the following condition: 0<(ra?rb)/(ra+rb)<0.Type: GrantFiled: August 4, 2008Date of Patent: September 7, 2010Assignee: Hoya CorporationInventor: Masaru Eguchi
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Patent number: 7777965Abstract: A zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group, in this order from the object. Upon zooming from the short focal length extremity to the long focal length extremity, the distance between the negative first lens group and the positive second lens group decreases, and the distance between the positive second lens group and the positive third lens group increases. The negative first lens group includes a negative first lens element, a positive or negative lens element having a weaker refractive power, and a positive third lens element, in this order from the object. The zoom lens system satisfied the following condition: ?0.25<f1/fp<0.25(f1<0)??(1) wherein f1 designates the focal length of the negative first lens group; and fp designates the focal length of the positive second lens element.Type: GrantFiled: August 4, 2008Date of Patent: August 17, 2010Assignee: Hoya CorporationInventor: Masaru Eguchi
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Publication number: 20100110561Abstract: A rear focus wide-angle lens system includes a first lens group, a diaphragm, and a second lens group, in this order from the object; the second lens group is moved along the optical axis thereof when focusing is performed from infinity to an object at a closer distance; and, the rear focus wide-angle lens system satisfies the following condition: 1.5<F1/F2<3.0??(1) wherein F1 designates the focal length of the first lens group; and F2 designates the focal length of the second lens group.Type: ApplicationFiled: October 30, 2009Publication date: May 6, 2010Applicant: HOYA CORPORATIONInventor: Masaru EGUCHI
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Patent number: 7675016Abstract: A solid-state image pickup device including a substrate having a first face and a second face which serves as an opposite face of the first face; a solid-state image pickup element having a plurality of electrodes and a light sensing part, an opposite face of the light sensing part being bonded to the first face via a bonding agent; a plurality of wires formed over the face, first ends of the wires serving as external electrode terminals; and a connection part for electrically connecting the electrodes to the wires, wherein an endless-shaped contraction frame formed of resin larger in thermal expansion coefficient than the substrate and image pickup element is bonded to and formed on surface of the substrate located outside the light sensing part so as to surround the light sensing part, and a light sensing face of the light sensing part is warped.Type: GrantFiled: August 17, 2007Date of Patent: March 9, 2010Assignees: Hitachi, Ltd., Pentax CorporationInventors: Chihiro Mochizuki, Hiroshi Kikuchi, Akira Arimoto, Masaru Eguchi, Shinichi Arai