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公开(公告)号：US08896911B2
公开(公告)日：2014-11-25
申请号：US13062357
申请日：2009-07-30
Applicant: Mitsuru Sugawara , Makoto Usami , Tomoyuki Akiyama
Inventor： Mitsuru Sugawara , Makoto Usami , Tomoyuki Akiyama
Abstract: The present invention is a laser system including a DFB laser 10 emitting a laser light 50, a semiconductor optical amplifier 20 that modulates an intensity of the laser light, and a harmonic generation element 30 that converts the laser light modulated to a visible light 54 that is a harmonic of the laser light. According to the present invention, it is possible to employ the highly efficient harmonic generation element capable of modulating the intensity of the laser light and to reduce power consumption.
Abstract translation: 本发明是一种激光系统，包括发射激光的DFB激光器10，调制激光强度的半导体光放大器20以及调制成可见光54的激光的谐波产生元件30， 是激光的谐波。 根据本发明，可以采用能够调制激光强度并降低功耗的高效谐波发生元件。
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公开(公告)号：US08160116B2
公开(公告)日：2012-04-17
申请号：US12667763
申请日：2008-06-09
Applicant: Tomoyuki Akiyama , Mitsuru Sugawara
Inventor： Tomoyuki Akiyama , Mitsuru Sugawara
IPC: H01S5/00
CPC classification number: B82Y20/00 , H01S5/0655 , H01S5/2086 , H01S5/2231 , H01S5/3412
Abstract: The present invention provides a semiconductor laser including a first conductive type of a lower clad layer 12, an active layer 14 provided on the lower clad layer 12, the active layer 14 including a plurality of quantum dots, and a second conductive type of an upper clad layer 18, the upper clad layer 18 being provided on the active layer 14 so as to have an isolated ridge portion 30 such that W1≦Wtop+0.4 μm where Wtop is the width of a top of the ridge portion 30 and W1 is the width of the ridge portion 30 at a height of 50 nm from a bottom of the ridge portion 30. The present invention also provides a method for manufacturing such a semiconductor laser.
Abstract translation: 本发明提供一种半导体激光器，其包括第一导电类型的下包层12，设置在下包层12上的有源层14，包括多个量子点的有源层14和第二导电类型的上 包覆层18，上覆盖层18设置在有源层14上，以便具有隔离的脊部30，使得Wtop为脊部30的顶部的宽度的W1＆nlE; Wtop +0.4μm，W1为 脊部30的距离脊部30的底部的高度为50nm的宽度。本发明还提供一种制造这种半导体激光器的方法。
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公开(公告)号：US20110181945A1
公开(公告)日：2011-07-28
申请号：US13121528
申请日：2009-07-30
Applicant: Kenichi Nishi
Inventor： Kenichi Nishi
CPC classification number: H01S5/341 , B82Y20/00 , H01S5/10 , H01S5/1053 , H01S5/22 , H01S5/3412
Abstract: The present invention is an optical semiconductor device including a lower clad layer 12 having a first conduction type, an active layer 14 that is provided on the lower clad layer 12 and has multiple quantum dot layers 51-55 having multiple quantum dots 41, and an upper clad layer 18 that is provided on the active layer 14 and has a second conduction type opposite to the first conduction type, the multiple quantum dot layers 51-55 having different quantum dot densities.
Abstract translation: 本发明是一种光半导体器件，其包括具有第一导电类型的下包层12，在下包层12上设置的具有多个量子点41的多个量子点层51-55的有源层14和 上覆盖层18设置在有源层14上并且具有与第一导电类型相反的第二导电类型，多个量子点层51-55具有不同的量子点密度。
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公开(公告)号：US12149053B2
公开(公告)日：2024-11-19
申请号：US18193980
申请日：2023-03-31
Applicant: DENSO CORPORATION , TOYOTA JIDOSHA KABUSHIKI KAISHA , MIRISE Technologies Corporation , QD LASER, Inc.
Inventor： Hitoshi Yamada , Yuki Kamata , Koichi Oyama , Yutaka Ohnishi , Kenichi Nishi , Keizo Takemasa
Abstract: In a semiconductor device, a quantum dot group includes a stack of plural quantum dot layers having different central wavelengths at which respective gains are maximum. A part of or all of the quantum dot layers are stacked so that the central wavelengths sequentially shifts along a stacking direction. The quantum dot group includes a longest wavelength layer group composed of some quantum dot layers including a longest wavelength layer having a longest central wavelength and at least one quantum dot layer stacked on the longest wavelength layer. The longest wavelength layer or the longest wavelength layer group has a larger gain at the central wavelength than the gain at the central wavelength of each of the other quantum dot layers.
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公开(公告)号：US11717157B2
公开(公告)日：2023-08-08
申请号：US16650798
申请日：2018-09-12
Applicant: QD LASER, INC.
Inventor： Kenji Yasui , Makoto Suzuki , Mitsuru Sugawara , Kinya Hasegawa
CPC classification number: A61B3/1225 , A61B3/0025 , A61B3/0058 , A61B3/0091 , A61B3/024 , A61B3/1025
Abstract: A visual sense examination device includes: a beam source that emits a visible beam and an invisible beam; a visible beam optical system that includes a first scanner scanning the visible beam; an invisible beam optical system that includes a second scanner scanning the invisible beam; a detector that detects the invisible beam reflected by a retina of a subject; a controller that performs a first control; a synthesizer that synthesizes the visible beam scanned by the first scanner and the invisible beam scanned by the second scanner; and wherein scanning angles of the visible beam by the first scanner and the invisible beam by the second scanner are substantially the same, and projectable ranges of the visible beam scanned by the first scanner and the invisible light scanned by the second scanner are substantially the same on the retina of the subject.
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Patent Agency Ranking
公开(公告)号：US20220196961A1
公开(公告)日：2022-06-23
申请号：US17593575
申请日：2020-03-25
Applicant: QD Laser, Inc.
Inventor： Makoto SUZUKI , Kenji YASUI , Kazutaka SAITO
Abstract: An image relay device that projects laser light representing an image emitted from a projection device onto the retina is provided. The image relay device includes a projection device, a first optical member, and a second optical member. The projection device includes a light source configured to emit laser light and a scan unit configured to scan the laser light based on image data. The first optical member receives an image light from the projection device and converts the image light which is a parallel light, to light beams of convergent light. The second optical member converts the light beams output from the first optical member into parallel light.
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公开(公告)号：US20220158415A1
公开(公告)日：2022-05-19
申请号：US17501497
申请日：2021-10-14
Applicant: DENSO CORPORATION , TOYOTA JIDOSHA KABUSHIKI KAISHA , MIRISE Technologies Corporation , QD LASER, Inc.
Inventor： Yuki KAMATA , Hiroyuki TARUMI , Koichi OYAMA , Keizo TAKEMASA , Kenichi NISHI , Yutaka ONISHI
Abstract: The semiconductor laser device includes: an activation layer having at least one first quantum dot layer and at least one second quantum dot layer having a longer emission wavelength than the first quantum dot layer. The gain spectrum of the active layer has the maximum values at the first wavelength and the second wavelength longer than the first wavelength corresponding to the emission wavelength of the first quantum dot layer and the emission wavelength of the second quantum dot layer, respectively. The maximum value of the gain spectrum at the first wavelength is defined as the first maximum value, and the maximum value of the gain spectrum at the second wavelength is defined as the second maximum value. The first maximum value is larger than the second maximum value.
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公开(公告)号：US11158034B2
公开(公告)日：2021-10-26
申请号：US16318263
申请日：2017-08-07
Applicant: QD LASER, INC.
Inventor： Seiji Morino , Makoto Suzuki , Manabu Ishimoto
Abstract: An image inspection device includes a mounting unit on which an image projection device that directly projects an image on a retina of a user is to be mounted; a condensing lens that condenses a light beam emitted from the image projection device mounted on the mounting unit; a detector on which an inspection image is projected and detected; and a controller that inspects the inspection image detected by the detector. The image inspection device inspects the image projected by the image projection device, which directly projects the image on the retina of the user.
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公开(公告)号：US11129527B2
公开(公告)日：2021-09-28
申请号：US16306694
申请日：2017-06-07
Applicant: QD Laser, Inc.
Inventor： Mitsuru Sugawara , Makoto Suzuki , Kinya Hasegawa
Abstract: A visual field/visual acuity examination system includes a retinal projection head-mounted display; and a terminal device. The terminal device outputs examination image data to the retinal projection head-mounted display; displays an image on a display; and generates an examination image based on the examination image data and display the examination image on the display. The retinal projection head-mounted display inputs the examination image data from the terminal device; generates an image light beam based on the input examination image data and control emission of the image light beam from a light source; causes a scanning minor to scan the image light beam to generate an examination image light beam; and projects the examination image light beam as the examination image on a retina of an eyeball of a test subject after converging the examination image light beam in a vicinity of a pupil of the eyeball.
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公开(公告)号：US20200275833A1
公开(公告)日：2020-09-03
申请号：US16650508
申请日：2018-08-23
Applicant: QD LASER, INC.
Inventor： Seiji MORINO , Makoto SUZUKI , Mitsuru SUGAWARA , Kinya HASEGAWA
Abstract: Provided is a vision test device including: a projection unit 10 that projects an image on a retina of a subject with use of a laser beam 50 by two-dimensionally scanning the laser beam; a beam diameter setting unit that sets a beam diameter of the laser beam; and a numerical aperture setting unit that sets a numerical aperture of the laser beam, wherein the projection unit projects, on the retina, a test image for measuring visual information of the subject with use of a laser beam having the set beam diameter and the set numerical aperture.
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