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公开(公告)号：US12066752B2
公开(公告)日：2024-08-20
申请号：US17760768
申请日：2020-10-29
Applicant: Kazuhiro Fujita , Kasumi Nakamura , Yohei Takano
Inventor： Kazuhiro Fujita , Kasumi Nakamura , Yohei Takano
CPC classification number: G03B21/204 , G02B26/008 , G03B21/2013 , G03B21/2066 , G03B21/208
Abstract: A light-source device includes an excitation light source to emit first color light; an optical member having a reflecting surface to reflect the first color light; a wavelength conversion unit including a wavelength conversion member on which the first color light reflected by the optical member is incident, the wavelength conversion member to convert at least part of the first color light into second color light having a wavelength different from a wavelength of the first color light and emit the second color light; and a light condensing element to condense the first color light emitted from the wavelength conversion unit. A straight line including a first optical path from a center of a flux of light rays emitted from the excitation light source, to the center of the first color light on the reflecting surface does not intersect with a light flux condensed by the light condensing element.
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2.发明授权
公开(公告)号：US11669004B2
公开(公告)日：2023-06-06
申请号：US17533119
申请日：2021-11-23
Applicant: Makoto Hirakawa , Yohei Takano , Kasumi Nakamura
Inventor： Makoto Hirakawa , Yohei Takano , Kasumi Nakamura
CPC classification number: G03B21/204 , G02B27/1066 , G02B27/283 , G03B21/208 , G03B21/2066 , G02B6/0056 , G02B6/105 , G02B6/2773
Abstract: A light source optical system includes: a first optical system configured to guide a first light beam having a first wavelength emitted from a light source to a wavelength conversion element; the wavelength conversion element configured to convert the first light beam into a second light beam having a second wavelength different from the first wavelength, and emit the second light beam; and a second optical system through which the second light beam emitted from the light conversion element passes. The second optical system includes a light guide element configured to guide a portion of the second light beam from one end surface of the light guide element to the other end surface of the light guide element to separate the portion of the second light beam from the second light beam.
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公开(公告)号：US20220342291A1
公开(公告)日：2022-10-27
申请号：US17760768
申请日：2020-10-29
Applicant: Kazuhiro FUJITA , Kasumi NAKAMURA , Yohei TAKANO
Inventor： Kazuhiro FUJITA , Kasumi NAKAMURA , Yohei TAKANO
Abstract: A light-source device includes an excitation light source to emit first color light; an optical member having a reflecting surface to reflect the first color light; a wavelength conversion unit including a wavelength conversion member on which the first color light reflected by the optical member is incident, the wavelength conversion member to convert at least part of the first color light into second color light having a wavelength different from a wavelength of the first color light and emit the second color light; and a light condensing element to condense the first color light emitted from the wavelength conversion unit. A straight line including a first optical path from a center of a flux of light rays emitted from the excitation light source, to the center of the first color light on the reflecting surface does not intersect with a light flux condensed by the light condensing element.
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4.发明申请
公开(公告)号：US20220171268A1
公开(公告)日：2022-06-02
申请号：US17533119
申请日：2021-11-23
Applicant: Makoto HIRAKAWA , Yohei TAKANO , Kasumi NAKAMURA
Inventor： Makoto HIRAKAWA , Yohei TAKANO , Kasumi NAKAMURA
Abstract: A light source optical system includes: a first optical system configured to guide a first light beam having a first wavelength emitted from a light source to a wavelength conversion element; the wavelength conversion element configured to convert the first light beam into a second light beam having a second wavelength different from the first wavelength, and emit the second light beam; and a second optical system through which the second light beam emitted from the light conversion element passes. The second optical system includes a light guide element configured to guide a portion of the second light beam from one end surface of the light guide element to the other end surface of the light guide element to separate the portion of the second light beam from the second light beam.
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公开(公告)号：US20200301260A1
公开(公告)日：2020-09-24
申请号：US16816264
申请日：2020-03-12
Applicant: Yohei TAKANO , Tatsuya TAKAHASHI , Kasumi NAKAMURA
Inventor： Yohei TAKANO , Tatsuya TAKAHASHI , Kasumi NAKAMURA
IPC: G03B21/20
Abstract: A light source optical system includes a wavelength conversion unit configured to receive first color light emitted from by an excitation light source and emit second color light with a wavelength different from a wavelength of the first color light; and a first optical system and a second optical system provided in an optical path between the excitation light source and the wavelength conversion unit. The first optical system includes one optical element having a negative power, wherein the second optical system as a whole has a positive power, and wherein Conditional Expression (1) is satisfied as follows: 1.8
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公开(公告)号：US06328947B1
公开(公告)日：2001-12-11
申请号：US09134732
申请日：1998-08-14
Applicant: Ryuji Monden , Kasumi Nakamura , Chozo Inoue , Masahiro Ohmori , Jun Tanaka , Tamotsu Yamashita , Mayumi Miyazawa
Inventor： Ryuji Monden , Kasumi Nakamura , Chozo Inoue , Masahiro Ohmori , Jun Tanaka , Tamotsu Yamashita , Mayumi Miyazawa
IPC: C01G23047
CPC classification number: C01G1/02 , B82Y30/00 , C01B13/32 , C01G17/02 , C01G19/02 , C01G23/0536 , C01G25/02 , C01G30/005 , C01G35/00 , C01P2002/72 , C01P2004/52 , C01P2004/64 , C01P2006/22
Abstract: A method for producing fine particles of metal oxide characterized in that metal halide is hydrolyzed in the presence of organic solvent. According to this invention, under hydrolysis of titanium tetrachrolide, anatase type titanium oxide can be obtained by selecting hydrophilic organic solvent, and rutile type titanium oxide can be obtained by selecting hydrophobic organic solvent.
Abstract translation: 一种金属氧化物微粒的制造方法，其特征在于金属卤化物在有机溶剂的存在下水解。 根据本发明，在四氯化钛的水解下，通过选择亲水性有机溶剂可以获得锐钛矿型氧化钛，通过选择疏水性有机溶剂可以获得金红石型氧化钛。
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公开(公告)号：US12130544B2
公开(公告)日：2024-10-29
申请号：US17772143
申请日：2020-10-28
Applicant: Yohei Takano , Kasumi Nakamura , Makoto Hirakawa
Inventor： Yohei Takano , Kasumi Nakamura , Makoto Hirakawa
CPC classification number: G03B21/204 , G02B26/008 , G03B21/008 , G03B21/2013 , G03B21/2066 , G03B21/2073
Abstract: A light-source optical system includes a wavelength converter on which light of first color is incident, the wavelength converter converting at least a part of the light of first color into light of second color different from the light of first color, a first optical system disposed upstream from the wavelength converter on an optical path of the light of first color, the first optical system including optical elements, a reflection plane disposed downstream from the first optical system on the optical path, and a second optical system disposed downstream from the reflection plane on the optical path. The reflection plane reflects one of the light of first color and the light of second color, and a conditional expression 0
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公开(公告)号：US20230209025A1
公开(公告)日：2023-06-29
申请号：US17974558
申请日：2022-10-27
Applicant: Jun MASHIMO , Kasumi NAKAMURA , Momotaro YOSHIDA
Inventor： Jun MASHIMO , Kasumi NAKAMURA , Momotaro YOSHIDA
IPC: H04N9/31
CPC classification number: H04N9/3158 , H04N9/3161 , H04N9/3164
Abstract: An image projection apparatus includes a first light source to emit a first excitation light of a specific wavelength, a second light source to emit a second excitation light of a specific wavelength, a first planar wavelength conversion element to convert the first excitation light into a light of a different specific wavelength, and a second planar wavelength conversion element to convert the second excitation light into a light of a specific wavelength different from the specific wavelength of the first excitation light converted by the first planar wavelength conversion element. In the image projection apparatus, the first planar wavelength conversion element and the second planar wavelength conversion element are arranged at positions different from each other, and the first planar wavelength conversion element and the second planar wavelength conversion element have a first plane and a second plane.
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公开(公告)号：US20210200075A1
公开(公告)日：2021-07-01
申请号：US17109174
申请日：2020-12-02
Applicant: Kasumi NAKAMURA , Yohei TAKANO , Makoto HIRAKAWA , Kazuhiro FUJITA
Inventor： Kasumi NAKAMURA , Yohei TAKANO , Makoto HIRAKAWA , Kazuhiro FUJITA
Abstract: A light-source device includes an excitation light source; a wavelength conversion unit to convert at least some of first color light into second color light; a light mixing element including a rod integrator to mix at least one of the first color light and the second color light from the conversion unit; and an optical element on an optical path of the first color light and having a reflecting surface. A center of the first color light on the reflecting surface intersects with only one of a first light flux of the first color light incident on and a second light flux of the first color light emitted from the conversion unit. An angle formed by a projection straight line of the first color light incident on an incident aperture of the integrator and a predetermined axial line of the incident aperture of the integrator is smaller than 40°.
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公开(公告)号：US10942434B2
公开(公告)日：2021-03-09
申请号：US16816264
申请日：2020-03-12
Applicant: Yohei Takano , Tatsuya Takahashi , Kasumi Nakamura
Inventor： Yohei Takano , Tatsuya Takahashi , Kasumi Nakamura
IPC: G03B21/20
Abstract: A light source optical system includes a wavelength conversion unit configured to receive first color light emitted from by an excitation light source and emit second color light with a wavelength different from a wavelength of the first color light; and a first optical system and a second optical system provided in an optical path between the excitation light source and the wavelength conversion unit. The first optical system includes one optical element having a negative power, wherein the second optical system as a whole has a positive power, and wherein Conditional Expression (1) is satisfied as follows: 1.8
