公开(公告)号：US11874592B2

公开(公告)日：2024-01-16

申请号：US17692208

申请日：2022-03-11

申请人： Kasumi Nakamura ,  Yohei Takano ,  Kazuhiro Fujita ,  Takashi Sasaki ,  Shigeaki Imai ,  Makoto Hirakawa

发明人： Kasumi Nakamura ,  Yohei Takano ,  Kazuhiro Fujita ,  Takashi Sasaki ,  Shigeaki Imai ,  Makoto Hirakawa

IPC分类号： G03B21/20 ,  G02B26/00

CPC分类号： G03B21/204 ,  G02B26/008 ,  G03B21/208 ,  G03B21/2013 ,  G03B21/2066

摘要： A light source device includes: a first light source to emit first color light; a second light source to emit second color light; a wavelength conversion unit to convert at least a portion of the first color light into a third color light; a light incident element to which the first color light, the second color light, and the third color light enter; a first filter to reflect the first color light toward the wavelength conversion unit; and a second filter to reflect the second color light toward the light incident element. The first filter and the second filter are separately disposed on an optical path of the third color light between the wavelength conversion unit and the light incident element.

公开(公告)号：US11812201B2

公开(公告)日：2023-11-07

申请号：US17724514

申请日：2022-04-20

申请人： Takashi Sasaki ,  Yohei Takano ,  Kasumi Nakamura ,  Kazuhiro Fujita ,  Makoto Hirakawa ,  Shigeaki Imai

发明人： Takashi Sasaki ,  Yohei Takano ,  Kasumi Nakamura ,  Kazuhiro Fujita ,  Makoto Hirakawa ,  Shigeaki Imai

IPC分类号： G02B27/09 ,  G02B27/10 ,  G03B21/20 ,  H04N9/31 ,  F21V8/00

CPC分类号： H04N9/317 ,  G02B6/0096 ,  G02B27/0994 ,  G02B27/10 ,  G03B21/204 ,  G03B21/2013 ,  G03B21/2066

摘要： A light guide optical device includes an optical path combiner including: a first deflector to deflect first light incident from a first direction to an emission direction; a second deflector to deflect second light incident from a second direction different from the first direction, to the emission direction; and a transmission portion between the first deflector and the second deflector, the transmission portion to transmit third light incident from a third direction different from each of the first direction and the second direction, to the emission direction. The optical path combining unit combines the first light, the second light, and the third light, and emits the combined light to the mission direction.

公开(公告)号：US11506967B2

公开(公告)日：2022-11-22

申请号：US17109174

申请日：2020-12-02

申请人： Kasumi Nakamura ,  Yohei Takano ,  Makoto Hirakawa ,  Kazuhiro Fujita

发明人： Kasumi Nakamura ,  Yohei Takano ,  Makoto Hirakawa ,  Kazuhiro Fujita

IPC分类号： G03B21/20 ,  G03B33/12

摘要： 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°.

公开(公告)号：US11720010B2

公开(公告)日：2023-08-08

申请号：US17539204

申请日：2021-12-01

申请人： Kazuhiro Fujita ,  Yohei Takano ,  Makoto Hirakawa ,  Shigeaki Imai

发明人： Kazuhiro Fujita ,  Yohei Takano ,  Makoto Hirakawa ,  Shigeaki Imai

IPC分类号： G03B21/20 ,  H04N9/31 ,  G02B26/00 ,  G02B27/14

CPC分类号： G03B21/204 ,  G02B26/008 ,  G02B27/141 ,  G03B21/208 ,  G03B21/2013 ,  G03B21/2066 ,  H04N9/3158 ,  H04N9/3161

摘要： A light source device includes a light source, a plurality of wavelength conversion units, and a plurality of optical systems. The plurality of wavelength conversion units each includes a wavelength conversion region configured to receive light emitted from the light source and emit light with a wavelength different from a wavelength of the received light. The plurality of optical systems are configured to form images of wavelength conversion regions of the plurality of wavelength conversion units. The light source is configured to irradiate the wavelength conversion units with light at a same timing. The plurality of optical systems are configured to cause the images of the wavelength conversion regions of the plurality of wavelength conversion units to be adjacent to or superimposed on each other.

公开(公告)号：US11630288B2

公开(公告)日：2023-04-18

申请号：US17462109

申请日：2021-08-31

申请人： Yohei Takano ,  Shigeaki Imai ,  Kazuhiro Fujita ,  Makoto Hirakawa

发明人： Yohei Takano ,  Shigeaki Imai ,  Kazuhiro Fujita ,  Makoto Hirakawa

IPC分类号： G02B13/16 ,  G02B5/00 ,  G02B7/02 ,  G02B26/08 ,  G03B21/00 ,  G02B13/22 ,  G03B21/20

摘要： An image projection apparatus includes: a light source; an image display element including multiple micromirrors arranged in two dimensions, the multiple micromirrors forming an image display plane, each micromirror having a reflecting surface; and a projection optical system. Conditional expressions (1) and (2) below are satisfied: θ1≥14(deg)  (1) 1.2

公开(公告)号：US11537037B2

公开(公告)日：2022-12-27

申请号：US17509106

申请日：2021-10-25

申请人： Yohei Takano ,  Kazuhiro Fujita ,  Makoto Hirakawa ,  Shigeaki Imai

发明人： Yohei Takano ,  Kazuhiro Fujita ,  Makoto Hirakawa ,  Shigeaki Imai

IPC分类号： G03B21/20 ,  G02B27/10 ,  G03B33/12

摘要： A light source device includes: multiple light source units each including a light source to emit a first color light beam, each of the multiple light source units configured to: convert at least part of the first color light beam into a second color light beam emitted from an emitting region; and emit the second color light beam to form a conjugate image; and a light combiner to combine the conjugate images formed by the multiple light source units to form a combined image, in which the conjugate images partially overlap each other, on a plane of an entrance surface of a light uniformizing element along a central axis of the light uniformizing element. A conditional expression below is satisfied: 1.3>SC/SI>0.7 where SC is an area of the combined image, and SI is an area of the entrance surface of the light uniformizing element.

公开(公告)号：US11669004B2

公开(公告)日：2023-06-06

申请号：US17533119

申请日：2021-11-23

申请人： Makoto Hirakawa ,  Yohei Takano ,  Kasumi Nakamura

发明人： Makoto Hirakawa ,  Yohei Takano ,  Kasumi Nakamura

IPC分类号： G03B21/20 ,  G02B27/28 ,  G02B27/10 ,  F21V8/00 ,  G02B6/10 ,  G02B6/27

CPC分类号： G03B21/204 ,  G02B27/1066 ,  G02B27/283 ,  G03B21/208 ,  G03B21/2066 ,  G02B6/0056 ,  G02B6/105 ,  G02B6/2773

摘要： 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.

公开(公告)号：US11829058B2

公开(公告)日：2023-11-28

申请号：US16823340

申请日：2020-03-19

申请人： Kasumi Nakamura ,  Yohei Takano ,  Tatsuya Takahashi ,  Makoto Hirakawa

发明人： Kasumi Nakamura ,  Yohei Takano ,  Tatsuya Takahashi ,  Makoto Hirakawa

IPC分类号： G03B21/20 ,  H04N9/31

CPC分类号： G03B21/204 ,  G03B21/2033 ,  G03B21/2066 ,  H04N9/3152

摘要： A light-source device includes an excitation light source; an optical element having a reflecting surface to reflect first colored light emitted from the excitation light source; and a wavelength conversion unit including a waveform conversion member configured to convert at least a portion of the first colored light reflected by the optical element and incident on the wavelength conversion unit, into second colored light having a wavelength different from a wavelength of the first colored light and emit the second colored light. A point P does not intersect with a light flux Q where the point P is a center of the first colored light on the reflecting surface of the optical element and the light flux Q is a light flux of the first colored light emitted from the wavelength conversion unit.

公开(公告)号：US12130544B2

公开(公告)日：2024-10-29

申请号：US17772143

申请日：2020-10-28

申请人： Yohei Takano ,  Kasumi Nakamura ,  Makoto Hirakawa

发明人： Yohei Takano ,  Kasumi Nakamura ,  Makoto Hirakawa

IPC分类号： G03B21/20 ,  G02B26/00 ,  G03B21/00

CPC分类号： G03B21/204 ,  G02B26/008 ,  G03B21/008 ,  G03B21/2013 ,  G03B21/2066 ,  G03B21/2073

摘要： 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

公开(公告)号：US10073333B2

公开(公告)日：2018-09-11

申请号：US15233037

申请日：2016-08-10

申请人： Takehiro Nishimori ,  Kazuhiro Fujita ,  Toshiharu Murai ,  Tatsuya Takahashi ,  Junichi Kitabayashi ,  Kaoru Itoh ,  Makoto Hirakawa

发明人： Takehiro Nishimori ,  Kazuhiro Fujita ,  Toshiharu Murai ,  Tatsuya Takahashi ,  Junichi Kitabayashi ,  Kaoru Itoh ,  Makoto Hirakawa

IPC分类号： G03B21/20 ,  G03B21/14 ,  G03B33/08 ,  H04N9/31 ,  G02B26/00 ,  G02B27/14

CPC分类号： G03B21/204 ,  G02B26/008 ,  G02B27/141 ,  G03B21/14 ,  G03B21/2033 ,  G03B21/206 ,  G03B21/208 ,  G03B21/2086 ,  G03B33/08 ,  H04N9/3114 ,  H04N9/3161

摘要： A light irradiation device for emitting light of two or more components by laser light, which a laser light source emits, to an outside, includes a diffusion optical path change member configured to convert a first color component of the laser light into diffusion light and change an optical path of the first color component; a phosphor configured to generate fluorescence of a second color component different from the first color component based on the laser light, and change an optical path of the second color component; and an optical path switch member configured to switch between a first optical path for emitting the first color component to the outside and a second optical path for emitting the second color component to the outside. Light going straight at a light diffusion position of the diffusion optical path change member is not emitted to the outside.