Patents by Inventor Nobuyoshi Toyohara
Nobuyoshi Toyohara 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: 20200200957Abstract: A polarization separation element that deals with a wide range of angles of incidence by a simple multilayer film (stacked-layer film), without having a need of a structural birefringent layer, a method of designing a polarization separation element, an optical system, and an optical instrument are provided. The polarization separation element is formed between a pair of light transmissive substrates and having a transmittance of P-polarized light and a transmittance of S-polarized light differing by at least B % or more in an entire section of wavelength from wavelength A1 (nm) to A2 (nm), and where, at a design wavelength ? (nm), A1=?×0.86, A2=?×1.7, and B (%)=22.5, The polarization separation element has a structure of alternately stacked dielectrics, including at least a broadband polarization separation film configuration, a first narrowband polarization separation film configuration, and a second narrowband polarization separation film configuration.Type: ApplicationFiled: March 5, 2020Publication date: June 25, 2020Applicant: OLYMPUS CORPORATIONInventors: Nobuyoshi TOYOHARA, Koichi OGAWA
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Publication number: 20140004277Abstract: A method of manufacturing an optical component by forming an optical thin film on a substrate made of resin using either an ion assisted deposition method or a plasma assisted deposition method, and by controlling a first parameter, which includes at least one of gas flow amount, irradiation duration, and applied power of the ion assisted method or the plasma assisted method, according to a second parameter relevant to a radius of curvature of the substrate.Type: ApplicationFiled: August 9, 2013Publication date: January 2, 2014Applicant: Olympus CorporationInventors: Takeshi Deguchi, Yoshito Ito, Kei Kikuchi, Nobuyoshi Toyohara
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Publication number: 20120200927Abstract: An optical element having anti-reflection film includes an anti-reflection film having a reflection characteristic expressed by a function Fm(x), which is on an mth optical surface, and an anti-reflection film having a reflection characteristic expressed by a function Fn(x), which is on an nth optical surface. At least one of the Fm(x) and Fn(x) functions has the maximum value of reflectance in a predetermined wavelength, and has a characteristic curve of W-shape, and the other of the Fm(x) and Fn(x) function has a wavelength that negates at least one maximum value of the Fm(x) and the Fn(x) functions. The anti-reflection film having reflection characteristic expressed by the function Fm(x) is on an optical surface on a side nearer to the light source, than the anti-reflection film having reflectance characteristic expressed by the function Fn(x), where, m and n are positive integers, and m<n.Type: ApplicationFiled: February 2, 2012Publication date: August 9, 2012Applicant: Olympus CorporationInventors: Takeshi Deguchi, Masanori Koyama, Ryo Sakurai, Nobuyoshi Toyohara
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Publication number: 20110217532Abstract: An optical component includes a multilayered optical thin film formed on a substrate. A critical load value of the optical thin film that includes at least one layer that is formed by a vacuum deposition method is greater than or equal to 30 mN. The critical load value is a value evaluated by a measurement method complying with JIS R3255 “Testing methods for adhesion of thin films on a glass substrate”.Type: ApplicationFiled: March 2, 2011Publication date: September 8, 2011Applicant: Olympus CorporationInventors: Takeshi Deguchi, Yoshito Ito, Kei Kikuchi, Nobuyoshi Toyohara
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Publication number: 20110217556Abstract: An optical component that includes a substrate and an optical thin film formed on the substrate. An internal stress ? (in units of MPa) satisfies Expression (1) given below when x=|E/R| is in the range of 0 to 3: ???30x??(1), where E is an effective optical diameter (in units of mm) of the substrate, R is a radius of curvature (in units of mm) of the substrate, and x is an absolute value of a ratio of E to R.Type: ApplicationFiled: March 2, 2011Publication date: September 8, 2011Applicant: Olympus CorporationInventors: TAKESHI DEGUCHI, Yoshito Ito, Kei Kikuchi, Nobuyoshi Toyohara
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Patent number: 7705326Abstract: An apparatus for fluorescence observation includes an excitation filter which transmits only exciting light of an specific wavelength among illumination light, and an absorption filter which blocks the exciting light and transmits only fluorescence generated from a specimen when the exciting light is irradiated to the specimen. Here, an interval of a half-value wavelength at a long-wavelength side of the excitation filter and a half-value wavelength at a short-wavelength side of the absorption filter is in a width between 1 nm to 6 nm, and change of the half-value wavelength of the excitation filter and the absorption filter when humidity changes from 10% to 95%, is 0.5 nm or less.Type: GrantFiled: April 9, 2008Date of Patent: April 27, 2010Assignee: Olympus CorporationInventors: Ken Kawamata, Nobuyoshi Toyohara
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Publication number: 20080296511Abstract: An apparatus for fluorescence observation includes an excitation filter which transmits only exciting light of an specific wavelength among illumination light, and an absorption filter which blocks the exciting light and transmits only fluorescence generated from a specimen when the exciting light is irradiated to the specimen. Here, an interval of a half-value wavelength at a long-wavelength side of the excitation filter and a half-value wavelength at a short-wavelength side of the absorption filter is in a width between 1 nm to 6 nm, and change of the half-value wavelength of the excitation filter and the absorption filter when humidity changes from 10% to 95%, is 0.5 nm or less.Type: ApplicationFiled: April 9, 2008Publication date: December 4, 2008Inventors: Ken Kawamata, Nobuyoshi Toyohara
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Publication number: 20080285119Abstract: An imaging apparatus comprises an optical system including a plurality of optical elements having finite refractive power and an electronic imaging device disposed at an image side of the optical system. At least one of the plurality of optical elements is made of resin, and an infrared-cut coating is applied to at least one face of the optical element that is made of resin.Type: ApplicationFiled: June 24, 2008Publication date: November 20, 2008Inventors: Noriyuki Iyama, Kazuyuki Hosokawa, Ken Kawamata, Nobuyoshi Toyohara, Joji Sakamoto
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Patent number: 7453568Abstract: An apparatus for fluorescence observation includes an excitation filter which transmits only exciting light of an specific wavelength among illumination light, and an absorption filter which blocks the exciting light and transmits only fluorescence generated from a specimen when the exciting light is irradiated to the specimen. Here, an interval of a half-value wavelength at a long-wavelength side of the excitation filter and a half-value wavelength at a short-wavelength side of the absorption filter is in a width between 1 nm to 6 nm, and change of the half-value wavelength of the excitation filter and the absorption filter when humidity changes from 10% to 95%, is 0.5 nm or less.Type: GrantFiled: May 19, 2004Date of Patent: November 18, 2008Assignee: Olympus CorporationInventors: Ken Kawamata, Nobuyoshi Toyohara
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Patent number: 7411729Abstract: An optical system includes a plurality of optical elements having finite refractive power and an electronic imaging device disposed at an image side of the optical system. At least one of the plurality of optical elements is made of resin, and an infrared-cut coating is applied to at least one face of the optical element that is made of resin.Type: GrantFiled: August 4, 2005Date of Patent: August 12, 2008Assignee: Olympus CorporationInventors: Noriyuki Iyama, Kazuyuki Hosokawa, Ken Kawamata, Nobuyoshi Toyohara, Joji Sakamoto
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Patent number: 7369314Abstract: In an optical filter, a thin film is formed by laminating low refractive index layers alternatingly from a substrate side with high refractive index layers. The thin film is provided with first, second, and third laminated portions. In the first laminated portion, the refractive indices of the high refractive index layers become gradually higher. In the second laminated portion, the refractive indices of the high refractive index layers are substantially equal to the highest refractive index of the high refractive index layers constituting the first laminated portion. In the third laminated portion, the refractive indices of the high refractive index layers become gradually lower, and the refractive indices of the low refractive index layers are substantially equal to the lowest refractive index of the low refractive index layers constituting the second laminated portion.Type: GrantFiled: December 26, 2006Date of Patent: May 6, 2008Assignee: Olympus CorporationInventors: Yorio Wada, Ken Kawamata, Nobuyoshi Toyohara, Yoshiki Shinta
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Patent number: 7324283Abstract: In an optical filter, a thin film is formed by laminating low refractive index layers alternatingly from a substrate side with high refractive index layers. The thin film is provided with first, second, and third laminated portions. In the first laminated portion, the refractive indices of the high refractive index layers become gradually higher. In the second laminated portion, the refractive indices of the high refractive index layers are substantially equal to the highest refractive index of the high refractive index layers constituting the first laminated portion. In the third laminated portion, the refractive indices of the high refractive index layers become gradually lower, and the refractive indices of the low refractive index layers are substantially equal to the lowest refractive index of the low refractive index layers constituting the second laminated portion.Type: GrantFiled: December 27, 2006Date of Patent: January 29, 2008Assignee: Olympus CorporationInventors: Yorio Wada, Ken Kawamata, Nobuyoshi Toyohara, Yoshiki Shinta
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Patent number: 7312925Abstract: In an optical filter, a thin film is formed by laminating low refractive index layers alternatingly from a substrate side with high refractive index layers. The thin film is provided with first, second, and third laminated portions. In the first laminated portion, the refractive indices of the high refractive index layers become gradually higher. In the second laminated portion, the refractive indices of the high refractive index layers are substantially equal to the highest refractive index of the high refractive index layers constituting the first laminated portion. In the third laminated portion, the refractive indices of the high refractive index layers become gradually lower, and the refractive indices of the low refractive index layers are substantially equal to the lowest refractive index of the low refractive index layers constituting the second laminated portion.Type: GrantFiled: December 28, 2006Date of Patent: December 25, 2007Assignee: Olympus CorporationInventors: Yorio Wada, Ken Kawamata, Nobuyoshi Toyohara, Yoshiki Shinta
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Publication number: 20070263287Abstract: In an optical filter, a thin film is formed by laminating low refractive index layers alternatingly from a substrate side with high refractive index layers. The thin film is provided with first, second, and third laminated portions. In the first laminated portion, the refractive indices of the high refractive index layers become gradually higher. In the second laminated portion, the refractive indices of the high refractive index layers are substantially equal to the highest refractive index of the high refractive index layers constituting the first laminated portion. In the third laminated portion, the refractive indices of the high refractive index layers become gradually lower, and the refractive indices of the low refractive index layers are substantially equal to the lowest refractive index of the low refractive index layers constituting the second laminated portion.Type: ApplicationFiled: December 28, 2006Publication date: November 15, 2007Inventors: Yorio Wada, Ken Kawamata, Nobuyoshi Toyohara, Yoshiki Shinta
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Patent number: 7289268Abstract: In an optical filter, a thin film is formed by laminating low refractive index layers alternatingly from a substrate side with high refractive index layers. The thin film is provided with first, second, and third laminated portions. In the first laminated portion, the refractive indices of the high refractive index layers become gradually higher. In the second laminated portion, the refractive indices of the high refractive index layers are substantially equal to the highest refractive index of the high refractive index layers constituting the first laminated portion. In the third laminated portion, the refractive indices of the high refractive index layers become gradually lower, and the refractive indices of the low refractive index layers are substantially equal to the lowest refractive index of the low refractive index layers constituting the second laminated portion.Type: GrantFiled: December 27, 2006Date of Patent: October 30, 2007Assignee: Olympus CorporationInventors: Yorio Wada, Ken Kawamata, Nobuyoshi Toyohara, Yoshiki Shinta
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Patent number: 7277228Abstract: In an optical filter, a thin film is formed by laminating low refractive index layers alternatingly from a substrate side with high refractive index layers. The thin film is provided with first, second, and third laminated portions. In the first laminated portion, the refractive indices of the high refractive index layers become gradually higher. In the second laminated portion, the refractive indices of the high refractive index layers are substantially equal to the highest refractive index of the high refractive index layers constituting the first laminated portion. In the third laminated portion, the refractive indices of the high refractive index layers become gradually lower, and the refractive indices of the low refractive index layers are substantially equal to the lowest refractive index of the low refractive index layers constituting the second laminated portion.Type: GrantFiled: December 28, 2006Date of Patent: October 2, 2007Assignee: Olympus CorporationInventors: Yorio Wada, Ken Kawamata, Nobuyoshi Toyohara, Yoshiki Shinta
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Patent number: 7274512Abstract: In an optical filter, a thin film is formed by laminating low refractive index layers alternatingly from a substrate side with high refractive index layers. The thin film is provided with first, second, and third laminated portions. In the first laminated portion, the refractive indices of the high refractive index layers become gradually higher. In the second laminated portion, the refractive indices of the high refractive index layers are substantially equal to the highest refractive index of the high refractive index layers constituting the first laminated portion. In the third laminated portion, the refractive indices of the high refractive index layers become gradually lower, and the refractive indices of the low refractive index layers are substantially equal to the lowest refractive index of the low refractive index layers constituting the second laminated portion.Type: GrantFiled: December 27, 2006Date of Patent: September 25, 2007Assignee: Olympus CorporationInventors: Yorio Wada, Ken Kawamata, Nobuyoshi Toyohara, Yoshiki Shinta
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Patent number: 7271959Abstract: In an optical filter, a thin film is formed by laminating low refractive index layers alternatingly from a substrate side with high refractive index layers. The thin film is provided with first, second, and third laminated portions. In the first laminated portion, the refractive indices of the high refractive index layers become gradually higher. In the second laminated portion, the refractive indices of the high refractive index layers are substantially equal to the highest refractive index of the high refractive index layers constituting the first laminated portion. In the third laminated portion, the refractive indices of the high refractive index layers become gradually lower, and the refractive indices of the low refractive index layers are substantially equal to the lowest refractive index of the low refractive index layers constituting the second laminated portion.Type: GrantFiled: January 2, 2007Date of Patent: September 18, 2007Assignee: Olympus CorporationInventors: Yorio Wada, Ken Kawamata, Nobuyoshi Toyohara, Yoshiki Shinta
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Patent number: 7265905Abstract: In an optical filter, a thin film is formed by laminating low refractive index layers alternatingly from a substrate side with high refractive index layers. The thin film is provided with first, second, and third laminated portions. In the first laminated portion, the refractive indices of the high refractive index layers become gradually higher. In the second laminated portion, the refractive indices of the high refractive index layers are substantially equal to the highest refractive index of the high refractive index layers constituting the first laminated portion. In the third laminated portion, the refractive indices of the high refractive index layers become gradually lower, and the refractive indices of the low refractive index layers are substantially equal to the lowest refractive index of the low refractive index layers constituting the second laminated portion.Type: GrantFiled: January 2, 2007Date of Patent: September 4, 2007Assignee: Olympus CorporationInventors: Yorio Wada, Ken Kawamata, Nobuyoshi Toyohara, Yoshiki Shinta
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Publication number: 20070109646Abstract: In an optical filter, a thin film is formed by laminating low refractive index layers alternatingly from a substrate side with high refractive index layers. The thin film is provided with first, second, and third laminated portions. In the first laminated portion, the refractive indices of the high refractive index layers become gradually higher. In the second laminated portion, the refractive indices of the high refractive index layers are substantially equal to the highest refractive index of the high refractive index layers constituting the first laminated portion. In the third laminated portion, the refractive indices of the high refractive index layers become gradually lower, and the refractive indices of the low refractive index layers are substantially equal to the lowest refractive index of the low refractive index layers constituting the second laminated portion.Type: ApplicationFiled: December 28, 2006Publication date: May 17, 2007Inventors: Yorio Wada, Ken Kawamata, Nobuyoshi Toyohara, Yoshiki Shinta