Patents by Inventor koichi Hadama
koichi Hadama 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: 11797092Abstract: Inside a housing of electronic equipment, a first actuator for generating vibration along a first axis is mounted. The first actuator is mounted in a direction in which the first axis is non-parallel and non-perpendicular to at least one of the six surfaces.Type: GrantFiled: March 11, 2020Date of Patent: October 24, 2023Assignee: Nippon Telegraph and Telephone CorporationInventors: Yuichi Higuchi, Koichi Hadama, Toshiki Wada, Toshihiko Kondo
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Publication number: 20220187170Abstract: A tester obtains a test result indicating a subjective evaluation result of a test subject with respect to a traction illusion generated by a sample. A quality checker checks the quality of the sample in accordance with the test result. A measurer performs measurement processing to obtain objective sample characteristic data representing the traction illusion generated by the sample. A feature computer computes a reference feature in accordance with a quality check result and the sample characteristic data. An inspector performs measurement processing to obtain objective inspection target characteristic data representing a traction illusion generated by an inspection target.Type: ApplicationFiled: March 13, 2020Publication date: June 16, 2022Inventors: Yuichi Higuchi, Koichi Hadama, Toshiki Wada, Toshihiko Kondo
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Publication number: 20220179490Abstract: Inside a housing of electronic equipment, a first actuator for generating vibration along a first axis is mounted. The first actuator is mounted in a direction in which the first axis is non-parallel and non-perpendicular to at least one of the six surfaces.Type: ApplicationFiled: March 11, 2020Publication date: June 9, 2022Inventors: Yuichi Higuchi, Koichi Hadama, Toshiki Wada, Toshihiko Kondo
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Patent number: 10006831Abstract: An end face observation device (101) of this invention includes a first lens (12) including a missing portion (1200) extending through in an optical axis direction, a light source (14) configured to generate light that irradiates an end face (200A) of an observation target via the first lens, and an image capturing element (15) configured to receive an image of the end face of the observation target via the first lens. This can implement an end face observation device that integrates a structure configured to operate the end face of the observation target with an observation device configured to observe the end face by inserting the structure configured to operate the end face of the observation target into the missing portion of the first lens.Type: GrantFiled: December 16, 2014Date of Patent: June 26, 2018Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yuichi Higuchi, Koichi Hadama, Joji Yamaguchi, Toru Miura, Etsu Hashimoto
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Patent number: 9967050Abstract: The invention provides a low-cost and easy-to-align optical signal processing device on which a plurality of WSS function units can be integrated using only a single lens. Optical signals input to the first input/output port group (101-1) are output into a space as collimated light via the microlens array (102). The signal light propagating through the space will be wavelength-demultiplexed by the diffraction grating (103), focused by the lens (104), and focused at the upper part in the drawing, with respect to the y-axis direction of the spatial light modulator (105). The light provided with a desired phase modulation and reflected by the spatial light modulator (105) is deflected at a desired angle in the y-z plane according to its phase setting, and further optically coupled to an arbitrary port by passing through the lens (104) again, thus the switching operation is completed.Type: GrantFiled: July 16, 2014Date of Patent: May 8, 2018Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kazunori Seno, Kenya Suzuki, Yuichiro Ikuma, Yuzo Ishii, Koichi Hadama
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Patent number: 9723387Abstract: To provide an optical signal processing device that can collect light from an input waveguide to form a beam array having a small diameter. The optical signal processing device includes input waveguides 302a to 302c, an array waveguide 305 and a slab waveguide 304 that is connected to a first arc 304a having the single point C as a center and input waveguides 302a to 302c and that is connected to a second arc 404b having the single point C as a center and an array waveguide 305.Type: GrantFiled: September 27, 2013Date of Patent: August 1, 2017Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kenya Suzuki, Kazunori Seno, Naoki Ooba, Tetsuo Takahashi, Toshio Watanabe, Takeshi Kawai, Mitsunori Fukutoku, Yuzo Ishii, Koichi Hadama, Yuichi Higuchi
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Patent number: 9645321Abstract: A wavelength selection switch can decrease the amount of increase in size and cost of a node device by integrating and sharing the constituent components of a plurality of wavelength selection switches or optical components mounted in a node. The wavelength selection switch has: at least one input port that inputs light; at least one output port that receives light from the input port; at least one light-collecting element that alters the beam shape of the light entering from the input port; at least one scattering element that scatters the light entering from the input port into each wavelength; at least one wavefront control element that causes light of each wavelength scattered by the scattering element to be reflected to the output port for each wavelength.Type: GrantFiled: August 30, 2013Date of Patent: May 9, 2017Assignee: Nippon Telegraph and Telephone CorporationInventors: Yuichi Higuchi, Jo ji Yamaguchi, Koichi Hadama, Yuzo Ishii, Kenya Suzuki, Kazunori Seno, Takeshi Kawai
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Patent number: 9588300Abstract: An optical input/output device includes a phase modulator element and an optical element. The phase modulator element includes a plurality of pixels arranged in a matrix and is configured to change an optical phase of signal light by applying a driving signal corresponding to a phase pattern. The optical element is configured to convert a direction of exit of the signal light so as to irradiate each pixel with the signal light from the input port. A pattern generator unit includes superimposing means for superimposing a periodic phase pattern having a predetermined period in at least one direction in a plane of the phase modulator element, and means for controlling an amplitude of the periodic phase pattern. The signal light is diffracted to a position according to the period of the superimposed periodic phase pattern, so that light intensity of the signal light is dispersed.Type: GrantFiled: December 6, 2013Date of Patent: March 7, 2017Assignee: Nippon Telegraph and Telephone CorporationInventors: Mitsumasa Nakajima, Keita Yamaguchi, Joji Yamaguchi, Yuzo Ishii, Koichi Hadama, Naru Nemoto, Etsu Hashimoto, Kazunori Seno, Kenya Suzuki, Yoshito Jin
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Publication number: 20160313211Abstract: An end face observation device (101) of this invention includes a first lens (12) including a missing portion (1200) extending through in an optical axis direction, a light source (14) configured to generate light that irradiates an end face (200A) of an observation target via the first lens, and an image capturing element (15) configured to receive an image of the end face of the observation target via the first lens. This can implement an end face observation device that integrates a structure configured to operate the end face of the observation target with an observation device configured to observe the end face by inserting the structure configured to operate the end face of the observation target into the missing portion of the first lens.Type: ApplicationFiled: December 16, 2014Publication date: October 27, 2016Inventors: Yuichi Higuchi, Koichi Hadama, Joji Yamaguchi, Toru Miura, Etsu Hashimoto
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Patent number: 9467755Abstract: An optical switch includes an input port, output ports, and a spatial light modulating section that receives an optical signal from the input port to deflect the optical signal to a selected one of the output ports. A phase distribution with the same radius of curvature as that of a wavefront of the optical signal and a phase distribution that allows the deflected optical signal to be coupled to the output port are set for the spatial light modulating section.Type: GrantFiled: August 30, 2013Date of Patent: October 11, 2016Assignee: Nippon Telegraph and Telephone CorporationInventors: Kenya Suzuki, Yuzo Ishii, Koichi Hadama, Kazunori Seno
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Publication number: 20160286288Abstract: An optical switch with a flat transmission property is provided. The optical switch includes an input port, an output port, a diffractive grating configured to perform wavelength demultiplexing on an optical signal from the input port, and LCOS configured to deflect the wavelength-demultiplexed optical signal to the output port. The diffractive grating is pre-arranged such that a shape of the optical signal as entering the LCOS is asymmetric with respect to an axis in the LCOS surface that is orthogonal to a wavelength axis of the diffractive grating.Type: ApplicationFiled: October 28, 2014Publication date: September 29, 2016Inventors: Kenya Suzuki, Kazunori Seno, Yuzo Ishii, Koichi Hadama, Naoki Ooba
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Publication number: 20160197695Abstract: The invention provides a low-cost and easy-to-align optical signal processing device on which a plurality of WSS function units can be integrated using only a single lens. Optical signals input to the first input/output port group (101-1) are output into a space as collimated light via the microlens array (102). The signal light propagating through the space will be wavelength-demultiplexed by the diffraction grating (103), focused by the lens (104), and focused at the upper part in the drawing, with respect to the y-axis direction of the spatial light modulator (105). The light provided with a desired phase modulation and reflected by the spatial light modulator (105) is deflected at a desired angle in the y-z plane according to its phase setting, and further optically coupled to an arbitrary port by passing through the lens (104) again, thus the switching operation is completed.Type: ApplicationFiled: July 16, 2014Publication date: July 7, 2016Inventors: Kazunori SENO, Kenya SUZUKI, Yuichiro IKUMA, Yuzo ISHII, Koichi HADAMA
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Patent number: 9323002Abstract: One side surface of a diffraction grating is securely held by a holder, and further, the holder is securely supported on a substrate by a supporter in such a manner that the diffraction grating held by the holder is not brought into contact with the substrate. In this manner, the diffraction grating is fixed only onto one side surface to the supporter via the holder, and further, the diffraction grating is not brought into contact with the substrate. Therefore, the lower portion of the supporter is displaced by heat generated in the substrate, however, the displacement of the supporter cannot adversely influence directly on the diffraction grating since the holder is interposed between the displaced portion and the diffraction grating.Type: GrantFiled: July 31, 2009Date of Patent: April 26, 2016Assignees: NTT ELECTRONICS CORPORATION, NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yuji Mitsuhashi, Toshiki Nishizawa, Hiroshi Tomita, Yuzo Ishii, Koichi Hadama
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Publication number: 20150316725Abstract: An optical input/output device includes a phase modulator element and an optical element. The phase modulator element includes a plurality of pixels arranged in a matrix and is configured to change an optical phase of signal light by applying a driving signal corresponding to a phase pattern. The optical element is configured to convert a direction of exit of the signal light so as to irradiate each pixel with the signal light from the input port. A pattern generator unit includes superimposing means for superimposing a periodic phase pattern having a predetermined period in at least one direction in a plane of the phase modulator element, and means for controlling an amplitude of the periodic phase pattern. The signal light is diffracted to a position according to the period of the superimposed periodic phase pattern, so that light intensity of the signal light is dispersed.Type: ApplicationFiled: December 6, 2013Publication date: November 5, 2015Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Mitsumasa Nakajima, Keita Yamaguchi, Joji Yamaguchi, Yuzo Ishii, Koichi Hadama, Naru Nemoto, Etsu Hashimoto, Kazunori Seno, Kenya Suzuki, Yoshito Jin
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Publication number: 20150268421Abstract: A wavelength selection switch can decrease the amount of increase in size and cost of a node device by integrating and sharing the constituent components of a plurality of wavelength selection switches or optical components mounted in a node. The wavelength selection switch has: at least one input port that inputs light; at least one output port that receives light from the input port; at least one light-collecting element that alters the beam shape of the light entering from the input port; at least one scattering element that scatters the light entering from the input port into each wavelength; at least one wavefront control element that causes light of each wavelength scattered by the scattering element to be reflected to the output port for each wavelength.Type: ApplicationFiled: August 30, 2013Publication date: September 24, 2015Inventors: Yuichi Higuchi, Jo ji Yamaguchi, Koichi Hadama, Yuzo Ishii, Kenya Suzuki, Kazunori Seno, Takeshi Kawai
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Publication number: 20150237420Abstract: To provide an optical signal processing device that can collect light from an input waveguide to form a beam array having a small diameter. The optical signal processing device includes input waveguides 302a to 302c, an array waveguide 305 and a slab waveguide 304 that is connected to a first arc 304a having the single point C as a center and input waveguides 302a to 302c and that is connected to a second arc 404b having the single point C as a center and an array waveguide 305.Type: ApplicationFiled: September 27, 2013Publication date: August 20, 2015Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kenya Suzuki, Kazunori Seno, Naoki Ooba, Tetsuo Takahashi, Toshio Watanabe, Takeshi Kawai, Mitsunori Fukutoku, Yuzo Ishii, Koichi Hadama, Yuichi Higuchi
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Publication number: 20150222967Abstract: An optical switch includes an input port, output ports, and a spatial light modulating section that receives an optical signal from the input port to deflect the optical signal to a selected one of the output ports. A phase distribution with the same radius of curvature as that of a wavefront of the optical signal and a phase distribution that allows the deflected optical signal to be coupled to the output port are set for the spatial light modulating section.Type: ApplicationFiled: August 30, 2013Publication date: August 6, 2015Inventors: Kenya Suzuki, Yuzo Ishii, Koichi Hadama, Kazunori Seno
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Patent number: 8699832Abstract: A light-shielding portion (10) shields the light spot of output light output toward a shunt position ? by a projecting portion (12). Hence, the output light output toward the shunt position ? does not travel to an output port (111). This allows to prevent crosstalk.Type: GrantFiled: March 29, 2010Date of Patent: April 15, 2014Assignees: Nippon Telegraph and Telephone Corporation, NTT Electronics CorporationInventors: Nobuaki Matsuura, Koichi Hadama, Etsu Hashimoto, Yuzo Ishii, Mitsuo Usui, Tohru Matsuura, Toshiki Nishizawa, Yuji Mitsuhashi
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Publication number: 20120093458Abstract: A light-shielding portion (10) shields the light spot of output light output toward a shunt position ? by a projecting portion (12). Hence, the output light output toward the shunt position ? does not travel to an output port (111). This allows to prevent crosstalk.Type: ApplicationFiled: March 29, 2010Publication date: April 19, 2012Inventors: Nobuaki Matsuura, Koichi Hadama, Etsu Hashimoto, Yuzo Ishii, Mitsuo Usui, Tohru Matsuura, Toshiki Nishizawa, Yuji Mitsuhashi
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Publication number: 20110129219Abstract: One side surface of a diffraction grating is securely held by a holder, and further, the holder is securely supported on a substrate by a supporter in such a manner that the diffraction grating held by the holder is not brought into contact with the substrate. In this manner, the diffraction grating is fixed only onto one side surface to the supporter via the holder, and further, the diffraction grating is not brought into contact with the substrate. Therefore, the lower portion of the supporter is displaced by heat generated in the substrate, however, the displacement of the supporter cannot adversely influence directly on the diffraction grating since the holder is interposed between the displaced portion and the diffraction grating.Type: ApplicationFiled: July 31, 2009Publication date: June 2, 2011Inventors: Yuji Mitsuhashi, Toshiki Nishizawa, Hiroshi Tomita, Yuzo Ishii, koichi Hadama