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公开(公告)号：US09389430B2
公开(公告)日：2016-07-12
申请号：US14517049
申请日：2014-10-17
Inventor： Kouki Ichihashi , Masahiro Kasano , Yasuhiro Tanaka , Katsuhiko Hayashi
CPC classification number: G02B27/2264 , G02B3/005 , G02B27/0093 , G02B27/2214 , G02B27/26 , G02F1/133526 , G02F1/29 , G02F2001/133565 , G02F2001/291
Abstract: A light deflection element is capable of deflecting incident light so as to follow a position of an observer and suppressing reduction in intensity of light that reaches eyes of the observer regardless of their position. The light deflection element includes: a first optical element configured to deflect incident light; a second optical element configured to change a deflection direction of emitted light by changing a refractive index thereof according to a voltage applied thereto; a third optical element; and a control section configured to control the voltage applied to the second optical element. At least one of interfaces between the first and second optical elements and the second and third optical elements is an aspheric surface. The aspheric surface has an optical power that compensates enlargement of the emitted light which is caused by refractive index distribution caused when a voltage is applied to the second optical element.
Abstract translation: 光偏转元件能够使入射光偏转以跟随观察者的位置，并且抑制到达观察者眼睛的光的强度降低，而不管其位置如何。 光偏转元件包括：第一光学元件，被配置为偏置入射光; 第二光学元件，被配置为通过根据施加到其上的电压改变其折射率来改变发射光的偏转方向; 第三光学元件; 以及控制部，被配置为控制施加到第二光学元件的电压。 第一和第二光学元件与第二和第三光学元件之间的至少一个界面是非球面。 非球面具有光学功率，其补偿当对第二光学元件施加电压时引起的由折射率分布引起的发射光的放大。
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Patent Agency Ranking
公开(公告)号：US10146052B2
公开(公告)日：2018-12-04
申请号：US15214841
申请日：2016-07-20
Inventor： Masahiro Kasano , Kouki Ichihashi , Yosuke Asai , Katsuhiko Hayashi
Abstract: The present disclosure provides a virtual image display apparatus, head-up display system, and vehicle that distribute a spatially divided parallax image between a left eye and right eye of a user appropriately. The virtual image display apparatus according to the present disclosure includes a display device configured to spatially divide with a first pitch and to output right-eye images and left-eye images, first optical members periodically disposed with a second pitch, distributing light based on the output from the display device between a right-eye direction and a left-eye direction, and a second optical member configured to reflect or refract, by positive power, the light distributed between the right-eye direction and the left-eye direction by the first optical members. The first pitch is narrower than the second pitch.
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公开(公告)号：US12246394B2
公开(公告)日：2025-03-11
申请号：US17394708
申请日：2021-08-05
Inventor： Kouki Ichihashi
IPC: B23K26/064 , G02B27/10 , H01S5/14
Abstract: An optical resonator of wavelength beam combining type, includes: a laser diode array having a plurality of laser elements arranged along a predetermined direction and configured to emit light beams having wavelengths different from one another; a diffraction grating that diffracts the light beam emitted from each of the laser elements at a diffraction angle corresponding to the wavelength of the light beam; an output coupler that reflects a part of the light beam diffracted by the diffraction grating toward each of the laser elements; and an optical system provided between the laser diode array and the diffraction grating and configured to align the light beams emitted from the laser elements with one another; wherein the optical system includes a first lens element having a negative power only in the predetermined direction and a second lens element having a positive power only in the predetermined direction.
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公开(公告)号：US20240176156A1
公开(公告)日：2024-05-30
申请号：US18428538
申请日：2024-01-31
Inventor： Tomoko Iiyama , Kouki Ichihashi
CPC classification number: G02B27/0922 , G02B27/0955 , G02B27/30
Abstract: An optical system includes: a first collimator lens disposed facing the light source array, configured to collimate each light beam in at least a vertical direction, intersecting an arrangement direction of light sources and an optical axis direction of each light beam, among the vertical direction and the arrangement direction; an optical element disposed on an emission side of each light beam in the first collimator lens; and a second collimator lens disposed on an emission side of each light beam in the optical element, configured to collimate each light beam at least in the arrangement direction. The first collimator lens includes lens portions arranged in the arrangement direction, the lens portions corresponding to the light sources in the light source array. The lens portions are configured rotationally asymmetrically to have positive power in the vertical direction and have positive power in the arrangement direction.
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公开(公告)号：US11493743B2
公开(公告)日：2022-11-08
申请号：US17095694
申请日：2020-11-11
Inventor： Takayuki Kai , Kouki Ichihashi
Abstract: An optical unit for a laser processing system includes a laser diode including a plurality of laser emitters which emit laser light, a lens unit including a plurality of lenses, a holding block having a light-transmitting property, and a light-shielding film. The holding block and the laser diode are bonded to each other with a first adhesive, and the lens unit and the holding block are bonded to each other with a second adhesive. The light-shielding film is located between the lens unit and the holding block.
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公开(公告)号：US20210387282A1
公开(公告)日：2021-12-16
申请号：US17394708
申请日：2021-08-05
Inventor： Kouki Ichihashi
IPC: B23K26/064 , H01S5/14 , G02B27/10
Abstract: An optical resonator of wavelength beam combining type, includes: a laser diode array having a plurality of laser elements arranged along a predetermined direction and configured to emit light beams having wavelengths different from one another; a diffraction grating that diffracts the light beam emitted from each of the laser elements at a diffraction angle corresponding to the wavelength of the light beam; an output coupler that reflects a part of the light beam diffracted by the diffraction grating toward each of the laser elements; and an optical system provided between the laser diode array and the diffraction grating and configured to align the light beams emitted from the laser elements with one another; wherein the optical system includes a first lens element having a negative power only in the predetermined direction and a second lens element having a positive power only in the predetermined direction.
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