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1.发明申请公开(公告)号：US20210048692A1
公开(公告)日：2021-02-18
申请号：US16977397
申请日：2019-02-07
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Hiroto SAKAI , Munenori TAKUMI , Hiroshi TANAKA
Abstract: An SLM includes a modulation unit and a driving circuit. The modulation unit includes a plurality of pixels, and modulates a phase or an intensity of incident light in each pixel according to an amplitude of a drive signal changing periodically with time. The driving circuit provides the drive signal to the modulation unit. The driving circuit performs control such that a phase of the drive signal V1(t) provided to a first pixel group in the plurality of pixels and a phase of the drive signal V2(t) provided to a second pixel group in the plurality of pixels are mutually inverted.
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公开(公告)号：US20210273411A1
公开(公告)日：2021-09-02
申请号：US17054000
申请日：2019-05-14
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Soh UENOYAMA , Kazuyoshi HIROSE , Yoshitaka KUROSAKA , Hiroshi TANAKA
Abstract: The present embodiment relates to a light-emitting device comprising a reflective metasurface modulating a phase for each of pixels constituting a one- or two-dimensional array. The light-emitting device comprises a surface emitting laser element, a light guide layer, and the metasurface. The metasurface has a light transmissive layer including a dielectric layer, one metal film on one surface thereof, and the other metal film on the other surface thereof. In each of unit regions corresponding to the pixels, the light transmissive layer includes a portion exposed without being covered with the metal film. The width of each unit region and the thickness of the light transmissive layer are smaller than the wavelength of the laser light to the metasurface. The metasurface modulates the phase of the laser light for each unit region. A first light output surface outputs the modulated laser.
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公开(公告)号：US20210191165A1
公开(公告)日：2021-06-24
申请号：US16769339
申请日：2017-12-05
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Kuniharu TAKIZAWA , Hiroshi TANAKA , Haruyoshi TOYODA , Yasushi OHBAYASHI , Hiroto SAKAI , Tsubasa WATANABE
IPC: G02F1/03
Abstract: A light modulator includes a perovskite-type electro-optic crystal having an input surface to which input light is input and a rear surface opposing the input surface, a first optical element being disposed on the input surface of the electro-optic crystal and having a first electrode through which the input light is transmitted, a second optical element being disposed on the rear surface of the electro-optic crystal and having a second electrode through which the input light is transmitted, and a drive circuit applying an electric field between the first electrode and the second electrode.
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4.发明申请公开(公告)号：US20200326564A1
公开(公告)日：2020-10-15
申请号：US16769327
申请日：2017-12-05
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Kuniharu TAKIZAWA , Hiroshi TANAKA , Haruyoshi TOYODA , Yasushi OHBAYASHI , Hiroto SAKAI , Tsubasa WATANABE
IPC: G02F1/03
Abstract: A reflective spatial light modulator includes an electro-optic crystal having an input surface to which input light is input and a rear surface opposing the input surface, a light input/output unit being disposed on the input surface of the electro-optic crystal and having a first electrode through which the input light is transmitted, a light reflection unit including a substrate including a plurality of second electrodes and being disposed on the rear surface side of the electro-optic crystal, and a drive circuit applying an electric field between the first electrode and the plurality of second electrodes. The light input/output unit includes a first charge injection curbing layer formed on the input surface, and the light reflection unit includes a second charge injection curbing layer formed on the rear surface.
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5.发明公开公开(公告)号：US20240004225A1
公开(公告)日：2024-01-04
申请号：US18367614
申请日：2023-09-13
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Hiroto SAKAI , Munenori TAKUMI , Hiroshi TANAKA
CPC classification number: G02F1/01 , G02F1/29 , G03H1/2294
Abstract: An SLM includes a modulation unit and a driving circuit. The modulation unit includes a plurality of pixels, and modulates a phase or an intensity of incident light in each pixel according to an amplitude of a drive signal changing periodically with time. The driving circuit provides the drive signal to the modulation unit. The driving circuit performs control such that a phase of the drive signal V1(t) provided to a first pixel group in the plurality of pixels and a phase of the drive signal V2(t) provided to a second pixel group in the plurality of pixels are mutually inverted.
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Patent Agency Ranking
公开(公告)号：US20190302492A1
公开(公告)日：2019-10-03
申请号：US16307517
申请日：2017-06-05
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Kuniharu TAKIZAWA , Hiroshi TANAKA , Haruyoshi TOYODA , Yasushi OHBAYASHI , Hiroto SAKAI
Abstract: A light modulator includes a perovskite-type electro-optic crystal including a first surface to which the input light is input and a second surface which faces the first surface; a first electrode which is disposed on the first surface of the electro-optic crystal and through which the input light is transmitted; a second electrode which is disposed on the second surface of the electro-optic crystal and through which the input light is transmitted; and a drive circuit for applying an electric field between the first electrode and the second electrode. The first electrode is disposed alone on the first surface. The second electrode is disposed alone on the second surface. At least one of the first electrode and the second electrode partially covers the first surface or the second surface. A propagation direction of the input light and an applying direction of the electric field are parallel to each other.
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7.发明申请公开(公告)号：US20190196164A1
公开(公告)日：2019-06-27
申请号：US16307511
申请日：2017-06-05
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Kuniharu TAKIZAWA , Hiroshi TANAKA , Haruyoshi TOYODA , Yasushi OHBAYASHI , Hiroto SAKAI
CPC classification number: G02B21/0032 , G02B21/00 , G02F1/03 , H04N5/2258
Abstract: A reflective spatial light modulator includes a perovskite-type electro-optic crystal having a relative permittivity of 1,000 or higher and including an input surface to which the input light is input and a rear surface which faces the input surface; a light input and output unit disposed on the input surface of the electro-optic crystal and including a first electrode through which the input light is transmitted; a light reflecting unit including a pixel electrode portion including a plurality of second electrodes and an adhesion layer fixing the pixel electrode portion to the rear surface, is disposed on the rear surface of the electro-optic crystal, and reflects the input light toward the input and output unit; and a drive circuit for applying an electric field between the first electrode and the plurality of second electrodes. The adhesion layer includes a dielectric material in a cured material of a non-conducting adhesive material.
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公开(公告)号：US20190154897A1
公开(公告)日：2019-05-23
申请号：US16307518
申请日：2017-06-05
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Kuniharu TAKIZAWA , Hiroshi TANAKA , Haruyoshi TOYODA , Yasushi OHBAYASHI , Hiroto SAKAI
Abstract: An optical element includes an electro-optic crystal having an isotropic crystal which belongs to a point group m3m of a cubic system and including an input surface to which input light is input and a rear surface which is a surface on the opposite side of the input surface; a first electrode disposed on the input surface; and a second electrode disposed on the rear surface. The input surface is located along at least one axis between axes obtained by rotating two crystal axes about one remaining crystal axis used as a rotation center at a predetermined angle in three crystal axes of the electro-optic crystal. A direction of an electric field to be induced by a voltage applied to a part between the first electrode and the second electrode is set in a propagation direction of the input light.
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9.发明公开公开(公告)号：US20240361120A1
公开(公告)日：2024-10-31
申请号：US18687468
申请日：2022-07-04
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Naoaki KATO , Yuu TAKIGUCHI , Hiroshi TANAKA
IPC: G01B11/24 , G01B9/02002 , G01B11/30
CPC classification number: G01B11/2441 , G01B9/02002 , G01B11/30
Abstract: An optical heterodyne interference measurement apparatus includes a beam generation unit, a beam splitter, a mirror, a first photodetector, a linear polarizer, a second photodetector, a linear polarizer, an AD conversion unit, and a computer. The beam generation unit generates and outputs a first light beam and a second light beam having polarizations orthogonal to each other. The first light beam and the second light beam have optical frequencies different from each other by a heterodyne frequency. The computer sets, when ωp is set to any peak frequency being temporally constant in a frequency spectrum of intensity noise included in the first light beam or the second light beam output from the beam generation unit, the heterodyne frequency ωh to a value of a rational multiple of the peak frequency ωp.
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公开(公告)号：US20210240052A1
公开(公告)日：2021-08-05
申请号：US17053130
申请日：2019-05-14
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Soh UENOYAMA , Kazuyoshi HIROSE , Yoshitaka KUROSAKA , Hiroshi TANAKA
IPC: G02F1/29
Abstract: A reflective dynamic metasurface of an embodiment comprises a structure enabling phase modulation in each of pixels constituting at least a one-dimensional array. The metasurface includes: a laminated structure body having a transparent conductive layer and a dielectric layer; a first metal film on one surface of the laminated structure body; a second metal film on the other surface of the laminated structure body; and a drive circuit controlling voltage applied between the first and second metal films. The first and second metal films are arranged to sandwich the pixels. The first metal film is arranged to expose a pair of window regions in one pixel, and the second metal film includes partial metal films defining the shape of each pixel and separated from each other. The drive circuit individually controls the potential of each partial metal film, thereby modulating the phase of the input light for each pixel.
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