Patents by Inventor Futoshi Ishii
Futoshi Ishii 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: 20210364864Abstract: An optical device is provided that includes a first optical member made of a birefringent material and disposed so that an optical axis of the first optical member is neither parallel nor orthogonal to a direction in which incident light travels. Moreover, a second optical member made of a birefringent material is disposed so that an optical axis of the second optical member is neither parallel nor orthogonal to the direction in which the incident light travels. A third optical member is disposed between the first and second optical members and generates an optical path difference of {¼+m×(½)}×? (m is an integer) between orthogonal polarization components of light emitted from the first optical member. At least one of the optical members is rotatable about an axis of the incident light.Type: ApplicationFiled: August 3, 2021Publication date: November 25, 2021Inventors: Keiji Murata, Futoshi Ishii
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Publication number: 20200199008Abstract: The present invention provides a method for manufacturing an optical fiber base material and an optical fiber base material, the method including: arranging a rod containing SiO2 family glass for core, in a container; pouring a SiO2 glass raw material solution for cladding layer and a hardener into the container, the glass raw material solution containing a hardening resin; solidifying the glass raw material solution through a self-hardening reaction; and then drying the solidified material and heating the solidified material in chlorine gas, to manufacture an optical fiber base material in which a SiO2 cladding layer is formed in an outer periphery of the rod containing SiO2 family glass for core.Type: ApplicationFiled: February 28, 2020Publication date: June 25, 2020Applicant: Kohoku Kyogo Co. Ltd.Inventors: Katsuyuki Imoto, Futoshi Ishii
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Publication number: 20190356104Abstract: A gas laser device including a gas laser tube having an internal space in which gas is enclosed, laser light being generated by exciting the gas; and a window member mounted at one end side in an axial direction of the gas laser tube. Moreover, the window member has a transmission region that is a uniaxial crystal, with the transmission region being configured such that the laser light is transmitted therethrough. The window member is mounted on the gas laser tube such that an optical axis of the laser light transmitting the transmission region and an optic axis of the uniaxial crystal are substantially parallel to each other.Type: ApplicationFiled: July 30, 2019Publication date: November 21, 2019Inventor: Futoshi Ishii
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Publication number: 20150116832Abstract: An optical component includes an optical substrate and a first band-pass filter disposed on the optical substrate. The first band-pass filter includes a high refractive index layer having a first refractive index, and a low refractive index layer having a second refractive index lower than the first refractive index. The high refractive index layer and the low refractive index layer are layered. An expression (nL×dL)/(nH×dH)?0.50 (1) is fulfilled, wherein the first refractive index is nH, the second refractive index is nL, the high refractive index layer has a physical film thickness of dH, and the low refractive index layer has a physical film thickness of dL.Type: ApplicationFiled: October 20, 2014Publication date: April 30, 2015Inventors: KEI KAMIUTO, FUTOSHI ISHII, MOTOO TAKADA
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Publication number: 20150086784Abstract: The present invention provides a method for manufacturing an optical fiber base material and an optical fiber base material, the method including: arranging a rod containing SiO2 family glass for core, in a container; pouring a SiO2 glass raw material solution for cladding layer and a hardener into the container, the glass raw material solution containing a hardening resin; solidifying the glass raw material solution through a self-hardening reaction; and then drying the solidified material and heating the solidified material in chlorine gas, to manufacture an optical fiber base material in which a SiO2 cladding layer is formed in an outer periphery of the rod containing SiO2 family glass for core.Type: ApplicationFiled: January 17, 2013Publication date: March 26, 2015Applicant: KOHOKU KOGYO CO., LTD.Inventors: Katsuyuki Imoto, Futoshi Ishii
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Patent number: 8202010Abstract: A connector component for optical fibers has good dimensional accuracy and parallelism. The connector component includes a base material. The base material is provided with at least two holes for inserting and fixing optical fibers therein. The base material is made of quartz glass. Inner components are arranged for forming holes for inserting optical fibers in a die for forming an outer form of the connector component with a dimensional accuracy equal to or less than 2 ?m. Slurry is poured into the die, the slurry including quartz powder, a resin binder, a dispersant, water and a curing agent. The poured slurry is cured and heated under vacuum so as to vitrify the cured slurry to obtain the quartz glass.Type: GrantFiled: April 15, 2011Date of Patent: June 19, 2012Assignee: Kohoku Kogyo Co., Ltd.Inventors: Futoshi Ishii, Shuhei Yoshizawa, Tamotsu Yajima, Haruhito Araki
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Publication number: 20110194819Abstract: A connector component for optical fibers has good dimensional accuracy and parallelism. The connector component includes a base material. The base material is provided with at least two holes for inserting and fixing optical fibers therein. The base material is made of quartz glass. Inner components are arranged for forming holes for inserting optical fibers in a die for forming an outer form of the connector component with a dimensional accuracy equal to or less than 2 ?m. Slurry is poured into the die, the slurry including quartz powder, a resin binder, a dispersant, water and a curing agent. The poured slurry is cured and heated under vacuum so as to vitrify the cured slurry to obtain the quartz glass.Type: ApplicationFiled: April 15, 2011Publication date: August 11, 2011Applicant: KOHOKU KOGYO CO., LTD.Inventors: Futoshi ISHII, Shuhei YOSHIZAWA, Tamotsu YAJIMA, Haruhito ARAKI
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Patent number: 7266282Abstract: There is provided a multi-cored fiber array for optical communication which has high dimensional accuracy, can easily be prepared by machining, and is low in cost. There is also provided a fiber array for optical communication which can reduce the necessary amount of an adhesive used for fixing optical fibers to a substrate. The fiber array for optical communication comprises: a substrate for inserting optical fibers therein; and a press plate for pressing and fixing the inserted optical fibers. The substrate has a plurality of grooves into which the optical fibers are to be inserted. The accuracy of the center-to-center dimension between the grooves adjacent to each other is within ±0.5 ?m, and the degree of parallelization in the groove length direction between the grooves adjacent to each other is within ±0.1 degree.Type: GrantFiled: May 8, 2003Date of Patent: September 4, 2007Assignee: Kohoku Kogyo Co., Ltd.Inventors: Jiangron Qiu, Kazuyuki Hirao, Shuhei Yoshizawa, Tamotsu Yajima, Futoshi Ishii
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Publication number: 20070065073Abstract: A connector component for optical fibers has good dimensional accuracy and parallelism. The connector component includes a base material. The base material is provided with at least two holes for inserting and fixing optical fibers therein. The base material is made of quartz glass. Inner components are arranged for forming holes for inserting optical fibers in a die for forming an outer form of the connector component with a dimensional accuracy equal to or less than 2 ?m. Slurry is poured into the die, the slurry including quartz powder, a resin binder, a dispersant, water and a curing agent. The poured slurry is cured and heated under vacuum so as to vitrify the cured slurry to obtain the quartz glass.Type: ApplicationFiled: November 21, 2006Publication date: March 22, 2007Inventors: Futoshi Ishii, Shuhei Yoshizawa, Tamotsu Yajima, Haruhito Araki
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Publication number: 20060209427Abstract: An image pickup apparatus includes a stator frame, a driving electrode substrate patterned with a polyphase stator electrode and mounted to the stator frame, a holding electrode substrate patterned with a stator electrode and mounted to the stator frame oppositely to the driving electrode substrate, a plurality of movable sections movably provided between the driving electrode substrate and the holding electrode substrate, and a holder mounted so as to project out beyond an outer surface of at least one of the plural movable sections for holding a lens in the movable section.Type: ApplicationFiled: March 17, 2006Publication date: September 21, 2006Applicant: Kabushiki Kaisha ToshibaInventors: Toshikatsu Akiba, Akihiro Koga, Kyoya Matsuda, Futoshi Ishii
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Publication number: 20060051045Abstract: There is provided a multi-cored fiber array for optical communication which has high dimensional accuracy, can easily be prepared by machining, and is low in cost. There is also provided a fiber array for optical communication which can reduce the necessary amount of an adhesive used for fixing optical fibers to a substrate. The fiber array for optical communication comprises: a substrate for inserting optical fibers therein; and a press plate for pressing and fixing the inserted optical fibers. The substrate has a plurality of grooves into which the optical fibers are to be inserted. The accuracy of the center-to-center dimension between the grooves adjacent to each other is within ±0.5 ?m, and the degree of parallelization in the groove length direction between the grooves adjacent to each other is within ±0.1 degree.Type: ApplicationFiled: May 8, 2003Publication date: March 9, 2006Inventors: Jiangron Qiu, Kazuyuki Hirao, Shuhei Yoshizawa, Tamotsu Yajima, Futoshi Ishii
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Publication number: 20050254769Abstract: An optical connector capable of providing a multicore ferrule for optical communication or a fiber array for optical communication having a high dimensional accuracy and easily manufactured at a low cost, comprising a plurality of insert holes for inserting optical fibers therein arranged at specified intervals, characterized in that the accuracy of the center-to-center distances between the adjacent insert holes is within ±0.5 ?m and a parallelism between the adjacent insert holes in hole axial direction is within ±0.1°.Type: ApplicationFiled: May 8, 2003Publication date: November 17, 2005Inventors: Jiangron Qiu, Kazuyuki Hirao, Shuhei Yoshizawa, Tamotsu Yajima, Futoshi Ishii
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Patent number: 6760297Abstract: There is disclosed a substrate unit comprising a light emitting element attachment surface for attaching a light emitting element which emits laser light substantially in parallel to the attachment surface, a light reflecting surface for changing the direction of the light axis of the laser light emitted from the light emitting element by a predetermined angle by reflection, and a light detecting element attachment surface, formed on the same two-dimensional plane as a plane of the light emitting element attachment surface, for attaching a light detecting element which receives light incident from the outside.Type: GrantFiled: October 29, 2001Date of Patent: July 6, 2004Assignee: Kabushiki Kaisha ToshibaInventors: Yoshiharu Fujioka, Kyoya Matsuda, Akio Onuki, Kunio Omi, Futoshi Ishii
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Publication number: 20030174973Abstract: A connector component for optical fibers has good dimensional accuracy and parallelism. The connector component includes a base material. The base material is provided with at least two holes for inserting and fixing optical fibers therein. The base material is made of quartz glass. Inner components are arranged for forming holes for inserting optical fibers in a die for forming an outer form of the connector component with a dimensional accuracy equal to or less than 2 &mgr;m. Slurry is poured into the die, the slurry including quartz powder, a resin binder, a dispersant, water and a curing agent. The poured slurry is cured and heated under vacuum so as to vitrify the cured slurry to obtain the quartz glass.Type: ApplicationFiled: July 16, 2002Publication date: September 18, 2003Inventors: Futoshi Ishii, Shuhei Yoshizawa, Tamotsu Yajima, Haruhito Araki
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Publication number: 20020159379Abstract: There is disclosed a substrate unit comprising a light emitting element attachment surface for attaching a light emitting element which emits laser light substantially in parallel to the attachment surface, a light reflecting surface for changing the direction of the light axis of the laser light emitted from the light emitting element by a predetermined angle by reflection, and a light detecting element attachment surface, formed on the same two-dimensional plane as a plane of the light emitting element attachment surface, for attaching a light detecting element which receives light incident from the outside.Type: ApplicationFiled: October 29, 2001Publication date: October 31, 2002Inventors: Yoshiharu Fujioka, Kyoya Matsuda, Akio Onuki, Kunio Omi, Futoshi Ishii
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Patent number: 6255705Abstract: Disclosed is a small-sized, power-saving and high-performance semiconductor integrated circuit that comprises first and second transistors formed on a substrate, wherein the gate electrode in the first transistor is of crystalline silicon, and the gate electrode in the second transistor is of a combination of crystalline silicon and a substance having a higher electric conductivity than said crystalline silicon as provided on at least a part of said crystalline silicon. In the circuit, the gate electrode in the first transistor is required to be patterned in fine patterns, while that in the second transistor is required to have low electric resistance. Such different types of gate electrodes are formed on one and the same substrate in a simple process. The elements constituting the circuit all have high quality.Type: GrantFiled: September 22, 1998Date of Patent: July 3, 2001Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hongyong Zhang, Masayuki Sakakura, Futoshi Ishii
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Patent number: 5956008Abstract: A driver circuit for use with an active matrix display. The driver circuit has a shift register circuit of a redundant configuration and consists of a main circuit and a preliminary circuit. When the main circuit becomes defective, the operating circuit is automatically switched from the main circuit to the preliminary circuit without physically cutting the circuitry by a laser beam or the like. The driver circuit is composed of a main shift register circuit and a preliminary shift register circuit connected in parallel with the main shift register circuit. The output from the final stage of flip-flop circuit of the flip-flop circuits forming the main shift register circuit is compared with the output from a monitoring flip-flop circuit connected with the output of the final stage of flip-flop circuit. Thus, the output signals from the flip-flop circuits of the main shift register circuit are switched respectively to the output signals from the flip-flop circuits of the preliminary shift register circuit.Type: GrantFiled: September 5, 1995Date of Patent: September 21, 1999Assignee: Semiconductor Energy Laboratory Co.,Inventors: Yuji Kawasaki, Futoshi Ishii