Patents by Inventor Juro Kikuchi
Juro Kikuchi 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: 6862383Abstract: An arrayed optical device includes a first optical fiber collimator array, a second optical fiber collimator array and an optical chip. The first optical fiber collimator array includes a first optical fiber array block and a first microlens array substrate. The second optical fiber collimator array includes a second optical fiber array block and a second microlens array substrate. The optical chip is coupled between the first microlens array substrate and the second microlens array substrate.Type: GrantFiled: March 15, 2001Date of Patent: March 1, 2005Assignee: Osaki Electric Co., Ltd.Inventors: Juro Kikuchi, Yasuyuki Mizushima, Hiroki Takahashi, Yoshiaki Takeuchi
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Publication number: 20030228100Abstract: An optical fiber collimator array includes an optical fiber array block and a microlens array substrate. The optical fiber array block includes an angled surface and is configured to receive and retain a plurality of individual optical fibers, which carry optical signals. The microlens array substrate includes a plurality of microlenses integrated along a microlens surface and a sloped surface opposite the microlens surface. The microlens surface is coupled to the angled surface such that the optical signals from the individual optical fibers are each collimated by a different one of the integrated microlenses.Type: ApplicationFiled: May 23, 2003Publication date: December 11, 2003Applicant: Osaki Electric Co., Ltd.Inventors: Juro Kikuchi, Yasuyuki Mizushima, Hiroki Takahashi, Yoshiaki Takeuchi
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Patent number: 6625350Abstract: An optical fiber collimator array includes an optical fiber array block and a microlens array substrate. The optical fiber array block includes an angled surface and is configured to receive and retain a plurality of individual optical fibers, which carry optical signals. The microlens array substrate includes a plurality of microlenses integrated along a microlens surface and a sloped surface opposite the microlens surface. The microlens surface is coupled to the angled surface such that the optical signals from the individual optical fibers are each collimated by a different one of the integrated microlenses.Type: GrantFiled: January 22, 2001Date of Patent: September 23, 2003Assignee: Osaki Electric Co., Ltd.Inventors: Juro Kikuchi, Yasuyuki Mizushima, Hiroki Takahashi, Yoshiaki Takeuchi
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Publication number: 20020097957Abstract: An arrayed optical device includes a first optical fiber collimator array, a second optical fiber collimator array and an optical chip. The first optical fiber collimator array includes a first optical fiber array block and a first microlens array substrate. The second optical fiber collimator array includes a second optical fiber array block and a second microlens array substrate. The optical chip is coupled between the first microlens array substrate and the second microlens array substrate.Type: ApplicationFiled: March 15, 2001Publication date: July 25, 2002Inventors: Juro Kikuchi, Yasuyuki Mizushima, Hiroki Takahashi, Yoshiaki Takeuchi
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Publication number: 20020097956Abstract: An optical fiber collimator array includes an optical fiber array block and a microlens array substrate. The optical fiber array block includes an angled surface and is configured to receive and retain a plurality of individual optical fibers, which carry optical signals. The microlens array substrate includes a plurality of microlenses integrated along a microlens surface and a sloped surface opposite the microlens surface. The microlens surface is coupled to the angled surface such that the optical signals from the individual optical fibers are each collimated by a different one of the integrated microlenses.Type: ApplicationFiled: January 22, 2001Publication date: July 25, 2002Inventors: Juro Kikuchi, Yasuyuki Mizushima, Hiroki Takahashi, Yoshiaki Takeuchi
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Patent number: 6404955Abstract: An alignment procedure aligns the components of an arrayed optical fiber collimator and reduces losses associated with the collimator. Initially, an optical fiber array block including a plurality of individual optical fibers is received and retained. Next, a microlens array substrate including a plurality of microlenses integrated along a microlens surface and a substrate surface opposite the microlens surface is received and retained. Then, at least a portion of a first light receiver that is positioned to receive a light beam from at least one of the integrated microlenses is received and retained. Next, at least one light beam is provided from the light source to at least one of the plurality of individual optical fibers. Then, the position of at least one of the microlens array substrate and the optical fiber array block is adjusted in relation to each other to maximize the optical power of the light beam received by the first light receiver.Type: GrantFiled: July 3, 2001Date of Patent: June 11, 2002Assignee: Corning, IncorporatedInventors: Juro Kikuchi, Yasuyuki Mizushima, Hiroki Takahashi, Yoshiaki Takeuchi
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Patent number: 5576788Abstract: A camera which reduces camera shake by adjusting the shutter timing is characterized in that it has a mode for displaying a camera shake amount to allow a photographer to recognize a camera shake. A shutter timing determining section permits shutter release at a timing at which the camera shake amount becomes a predetermined amount or less during a shutter release operation on the basis of the camera shake amount detected by a camera shake detecting section. When a camera shake learning mode is set through an input section, a camera shake amount is converted into a display amount by a display data converting section through a camera shake mode selecting section. This display amount is displayed on a display section in real time while a shutter release button is depressed.Type: GrantFiled: April 18, 1994Date of Patent: November 19, 1996Assignee: Olympus Optical Co., Ltd.Inventors: Azuma Miyazawa, Yuji Imai, Hisayuki Matsumoto, Hideto Kitazawa, Yoshinori Matsuzawa, Juro Kikuchi
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Patent number: 5491527Abstract: A taking optical system capable of trimming photography, wherein as the trimming magnification increases, the lens performance for the central area of an image frame on a negative film improves, thereby enabling photographs of excellent image quality to be obtained over the entire photography mode range, from ordinary photography to trimming photography. The taking optical system includes a plurality of lens groups arranged to enable at least two photography modes to be changed over from one to the other, the photography modes including a first mode in which a first image forming area is set for photography, and a second mode in which a second image forming area smaller than the first image forming area is set for photography. When the photography mode shifts from the first mode to the second mode, the spacing between the lens groups is changed, thereby effectively correcting aberrations in the second image forming area.Type: GrantFiled: December 29, 1994Date of Patent: February 13, 1996Assignee: Olympus Optical Co., Ltd.Inventors: Minoru Oshikiri, Juro Kikuchi
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Patent number: 5446590Abstract: A high eye point type viewfinder optical system comprising an eyepiece lens system for observing an image of an object formed on a reticle, and a pentagonal prism and a condenser lens which are disposed between the reticle and the eyepiece lens system in order from the eyepiece lens system; wherein the eyepiece lens system consists, in order from the side of an eye of a photographer, of a first negative lens component, a second positive lens component and a third lens component. This viewfinder optical system is configured so as to permit adjustment of diopter by moving the second and third lens components along an optical axis with the first lens component kept fixed or moving the second lens component along the optical axis with the first and third lens components kept fixed.Type: GrantFiled: July 7, 1993Date of Patent: August 29, 1995Assignee: Olympus Optical Co., Ltd.Inventor: Juro Kikuchi
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Patent number: 5406344Abstract: A taking optical system capable of trimming photography, wherein as the trimming magnification increases, the lens performance for the central area of an image frame on a negative film improves, thereby enabling photographs of excellent image quality to be obtained over the entire photography mode range, from ordinary photography to trimming photography. The taking optical system includes a plurality of lens groups arranged to enable at least two photography modes to be changed over from one to the other, the photography modes including a first mode in which a first image forming area is set for photography, and a second mode in which a second image forming area smaller than the first image forming area is set for photography. When the photography mode shifts from the first mode to the second mode, the spacing between the lens groups is changed, thereby effectively correcting aberrations in the second image forming area.Type: GrantFiled: September 9, 1993Date of Patent: April 11, 1995Assignee: Olympus Optical Co., Ltd.Inventors: Minoru Oshikiri, Juro Kikuchi
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Patent number: 5369462Abstract: An inclination detecting apparatus includes a light projecting section, a light receiving section and an operating section. The light projection section projects light towards an object. The light receiving section receives lights reflected from at least two points of the object and outputs a photoelectric current signal. The operating section derives a difference between the reciprocals of the square roots of the photoelectric currents output from the light receiving section. An output of the operating section represents an inclination signal of the object. A shake detecting apparatus includes a light projecting/receiving section and an operating section. The light projecting/receiving section is disposed on the rear surface of a camera, so as to project light towards a photographer, receive lights reflected from at least two points on light receiving elements, and output photoelectric current signals for the respective points.Type: GrantFiled: June 7, 1993Date of Patent: November 29, 1994Assignee: Olympus Optical Co., Ltd.Inventors: Azuma Miyazawa, Kouji Mizobuchi, Takeshi Ito, Masataka Ide, Atsushi Maruyama, Juro Kikuchi, Yuji Imai
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Patent number: 5221996Abstract: A zoom lens system comprising at least a first lens unit having a positive refractive power as a whole, a second lens unit having a negative refractive power as a whole and a third lens unit having a positive refractive power as a whole, and adapted to perform variation of focal length by varying at least two airspaces reserved between said lens units. This zoom lens system consists of a small number of lens elements, has a short total length and a compact external design, and is light in weight.Type: GrantFiled: September 20, 1991Date of Patent: June 22, 1993Assignee: Olympus Optical Co., Ltd.Inventor: Juro Kikuchi
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Patent number: 5172268Abstract: The image stabilizing optical system comprises a master lens, and a meniscus lens arranged between the master lens and the image surface thereof, and having a concave surface opposed to the exit pupil of the master lens, said meniscus lens having inclination variable relative to the optical axis of the master lens. This image stabilizing optical system is capable of quickly and favorably correcting blur of image produced due to vibration of a photographic lens system without degrading image quality by varying inclination of the meniscus lens in conjunction with the vibration.Type: GrantFiled: September 20, 1990Date of Patent: December 15, 1992Assignee: Olympus Optical Co., Ltd.Inventor: Juro Kikuchi
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Patent number: 5124836Abstract: A real image mode optical system includes an objective lens forming an image of an object and an eyepiece for observing the image and is provided with a variable focal length mirror which dispenses with any polarizing plate so that a diopter change can be corrected due to the change of its optical power. Accordingly, the real image mode optical system has many advantages important for practical use that the reduction of the amount of light is slight, the characteristics are little changed by gravity, the number of parts is small with low manufacturing costs, the strain of the lens and the like of the optical system is not viewed, aberrations are little produced, and the effective aperture of the entire optical system can be set at a minimum.Type: GrantFiled: December 21, 1990Date of Patent: June 23, 1992Assignee: Olympus Optical Co., Ltd.Inventor: Juro Kikuchi
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Patent number: 5095388Abstract: A zoom lens system permitting photographing at definite magnification levels comprising a first lens unit and a second lens unit, and equipped with a first mechanism for varying f and .beta. so as to keep f/.beta. nearly constant and a second mechanism for varying, independently of the first mechanism, the airspace between the first lens unit and the second lens unit when the reference symbol f represents total focal length of the first lens unit and the reference symbol .beta. designates total lateral magnification of the second lens unit. Said zoom lens system is equipped with simple mechanisms and permits photographing objects located at distances within a broad range at optional magnification levels within a certain range.Type: GrantFiled: November 26, 1990Date of Patent: March 10, 1992Assignee: Olympus Optical Co., Ltd.Inventor: Juro Kikuchi
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Patent number: 5068679Abstract: An imaging optical system having a photographic lens and a mechanical stop is provided with a variable focal length lens disposed adjacent to a mechanical stop and having a diameter smaller than a maximum diameter of a beam of light capable of traversing the mechanical stop when opened. Further, the imaging optical system may be provided with a physical stop capable of changing transmittance in an electric field or a magnetic field and constructed so that a maximum diameter of a light-blocking portion is smaller than that of the beam of light capable of traversing the mechanical stop when opened. Consequently, adjustment of the amount of light in ordinary photography and macrophotography is properly made and a camera with low cost is secured.Type: GrantFiled: April 27, 1990Date of Patent: November 26, 1991Assignee: Olympus Optical Co., Ltd.Inventor: Juro Kikuchi
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Patent number: 5052791Abstract: The variable magnification viewfinder optical system comprises a polarizing element allowing the light incident thereon to emerge as a linearly polarized light, an objective optical system comprising a first lens component having refractive power variable dependently on the oscillating direction of the incident light, an eyepiece optical system comprising a second lens component having variable refractive power and a switching device capable of changing the oscillating direction of said polarizing element from one to another perpendicular to each other. This viewfinder optical system is capable of easily attaining to design performance thereof such as magnification, dioptric power, field ratio and image legibility, and permits simplifying composition thereof and lowering manufacturing cost therefor.Type: GrantFiled: July 9, 1990Date of Patent: October 1, 1991Assignee: Olympus Optical Co., Ltd.Inventor: Juro Kikuchi
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Patent number: 4978989Abstract: A camera having a red-eye alarm device which receives a signal representative of a distance l between an object to be photographed and a camera, the focal length f of a taking lens, a signal representative of a distance d between the optical axis of the taking lens and the center of an electronic flash discharge tube, and develops an alarm signal based upon the object distance l, the focal length f and the spacing d, the red-eye alarm signal being developed when a conditional formula ##EQU1## is satisfied.Type: GrantFiled: November 21, 1989Date of Patent: December 18, 1990Assignee: Olympus Optical Co., Ltd.Inventors: Toshifumi Nakano, Akira Inoue, Juro Kikuchi, Hiroaki Nakamura, Tatsuji Higuchi
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Patent number: 4963010Abstract: A compact zoom lens system consisting of a small number of lens elements and having a short total length, said zoom lens system comprising a first lens unit having positive refractive power and a second lens unit having negative refractive power which are arranged in the order from the object side, an aperture stop arranged in said first lens unit, at least one lens component arranged after said aperture stop in said first lens unit and at least one graded refractive index lens having refractive index gradient in the direction perpendicular to the optical axis in said first lens unit.Type: GrantFiled: August 11, 1989Date of Patent: October 16, 1990Assignee: Olympus Optical Co., Ltd.Inventor: Juro Kikuchi
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Patent number: 4952956Abstract: A finder optical system is provided with a plurality of optical elements, a reflecting surface for indication provided on a surface of one of the plurality of optical elements, a semi-transmissive surface disposed on an object side of the reflecting surface for indication, and an optical member, changing a polarizing state of light, provided between the reflecting surface for indication and the semi-transmissive surface. The semi-transmissive surface is composed of a surface different in reflectivity and transmittance in accordance with a direction of polarization of light. This finder optical system is adapted to image light reflected form the reflecting surface for indication after reflection from the semi-transmissive surface. The finder optical system can provide relatively simple and compact structure and can bring about a bright and easily-viewed visual field in which the generation of ghost and flare is minimized.Type: GrantFiled: September 13, 1989Date of Patent: August 28, 1990Assignee: Olympus Optical Co., Ltd.Inventor: Juro Kikuchi