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1.发明公开公开(公告)号：US20240272470A1
公开(公告)日：2024-08-15
申请号：US18628527
申请日：2024-04-05
Applicant: FUJIFILM Corporation
Inventor： Hiroshi SATO , Yukito SAITOH , Takashi YONEMOTO , Makoto ISHIGURO
IPC: G02F1/1335 , G02B5/30 , G02F1/1337
CPC classification number: G02F1/133504 , G02F1/133541 , G02F1/133761 , G02B5/3083
Abstract: Provided are a liquid crystal diffraction element having a high diffraction efficiency irrespective of diffraction angles, an optical element including the liquid crystal diffraction element, and an image display unit, a head-mounted display, a beam steering, and a sensor including the liquid crystal diffraction element or the optical element. The liquid crystal diffraction element includes: an optically-anisotropic layer that is formed of a liquid crystal composition including a liquid crystal compound, in which the optically-anisotropic layer has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound changes while continuously rotating in at least one in-plane direction, in a case where a length over which the direction of the optical axis derived from the liquid crystal compound rotates by 180° in a plane is set as a single period, a length of the single period in the liquid crystal alignment pattern gradually changes in the one in-plane direction, in a cross-sectional image of the optically-anisotropic layer obtained by observing a cross-section taken in a thickness direction parallel to the one in-plane direction with a scanning electron microscope, the optically-anisotropic layer has bright portions and dark portions extending from one surface to another surface and each of the dark portions has two or more inflection points of angle, the optically-anisotropic layer has regions where tilt directions of the dark portions are different from each other in the thickness direction, and an average tilt angle of the dark portion gradually changes in the one in-plane direction.
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公开(公告)号：US20230022744A1
公开(公告)日：2023-01-26
申请号：US17957334
申请日：2022-09-30
Applicant: FUJIFILM Corporation
Inventor： Hiroshi SATO , Yukito SAITOH
IPC: G02B27/01 , G02F1/1335 , G02F1/13363
Abstract: Provide are an optical element that can improve a utilization efficiency of light while increasing an optical path length, an image display unit, and a head-mounted display. The optical element includes, in the following order: a first absorptive linearly polarizing plate; a first reflective linearly polarizing plate; a first retardation plate; a partially reflecting mirror that allows transmission of a part of incident light and reflects a part of the incident light; a second retardation plate; and a second reflective linearly polarizing plate, in which a turning direction of circularly polarized light that is reflected from the first reflective linearly polarizing plate in a case where light transmits through the first retardation plate and is incident into the first reflective linearly polarizing plate is opposite to a turning direction of circularly polarized light that is reflected from the second reflective linearly polarizing plate in a case where light transmits through the second retardation plate and is incident into the second reflective linearly polarizing plate.
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公开(公告)号：US20220326531A1
公开(公告)日：2022-10-13
申请号：US17848574
申请日：2022-06-24
Applicant: FUJIFILM Corporation
Inventor： Hiroshi SATO , Katsumi SASATA , Yukito SAITOH
Abstract: Provided are: a light guide element in which deterioration in image sharpness can be prevented and the entire area of a display image can be suitably observed irrespective of the visual line of a user, the position of eyes of the user, and the like; and an image display apparatus including the light guide element. The light guide element includes: a light guide plate that includes a first light guide layer and a second light guide layer; and an incidence diffraction element and an emission diffraction element that are laminated on the second light guide layer, in which in a case where a refractive index of the first light guide layer is represented by n1 and a refractive index of the second light guide layer is represented by n2 in the light guide plate, n1
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公开(公告)号：US20220326430A1
公开(公告)日：2022-10-13
申请号：US17849302
申请日：2022-06-24
Applicant: FUJIFILM Corporation
Inventor： Akiko WATANO , Katsumi SASATA , Yukito SAITOH , Hiroshi SATO
Abstract: Provided are: a method of manufacturing an optical element that can display a clear image having no blurriness in AR glasses or the like; and an optical element that is manufactured using this manufacturing method. The manufacturing method include: a step of forming a photo-alignment film, performing interference exposure to form an alignment pattern, and applying a liquid crystal composition to the photo-alignment film to form a first liquid crystal layer; a liquid crystal layer lamination step of forming a photo-alignment film, performing interference exposure to form an alignment pattern, applying a liquid crystal composition to the photo-alignment film to form a liquid crystal layer for lamination, peeling off the liquid crystal layer for lamination from the photo-alignment film, and laminating the peeled liquid crystal layer for lamination on the first liquid crystal layer or the liquid crystal layer for lamination, the liquid crystal layer lamination step being optionally performed once or more; a step of peeling off the first liquid crystal layer from the photo-alignment film; a step of forming an adhesive layer having a surface roughness Ra of 15 nm or less on the light guide plate and/or the first liquid crystal layer; and a step of bonding the light guide plate and the first liquid crystal layer using the adhesive layer.
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公开(公告)号：US20220179197A1
公开(公告)日：2022-06-09
申请号：US17681057
申请日：2022-02-25
Applicant: FUJIFILM Corporation
Inventor： Hiroshi SATO , Yukito SAITOH
Abstract: An object is to provide a light deflection device and an optical device having a simple structure suitable for reducing the size and weight where a deflection angle can be increased. The light deflection device includes: a light deflection element that deflects incident light in one in-plane direction to be emitted; a driving unit that drives the light deflection element; a light collecting element that is disposed on a light emission side of the light deflection element; and an angle increasing optical element consisting of a diffraction element in which a periodic structure pitch gradually changes from a center of deflection of the light deflection element toward an outer side.
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Patent Agency Ranking
公开(公告)号：US20220179194A1
公开(公告)日：2022-06-09
申请号：US17681183
申请日：2022-02-25
Applicant: FUJIFILM Corporation
Inventor： Yukito SAITOH , Hiroshi SATO
Abstract: An object is to provide a light deflection device having a simple structure suitable for reducing the size and weight where a deflection angle can be increased, and an optical device including the light deflection device. The light deflection device includes: a MEMS light deflection element that deflects incident light to be emitted; and an angle increasing optical element that is disposed downstream of the light deflection element in a light traveling direction and increases an angle range of a deflection angle of light emitted from the light deflection element, in which the MEMS light deflection element has a function of collecting and emitting incident light.
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公开(公告)号：US20220066076A1
公开(公告)日：2022-03-03
申请号：US17525273
申请日：2021-11-12
Applicant: FUJIFILM Corporation
Inventor： Katsumi SASATA , Hiroshi SATO , Yukito SAITOH
Abstract: Provided are a cholesteric liquid crystal layer that diffracts specific circularly polarized light in a specific wavelength range by transmission, and a method of forming the cholesteric liquid crystal layer. The cholesteric liquid crystal layer is obtained by immobilizing a cholesteric liquid crystalline phase, in which the cholesteric liquid crystal layer has a liquid crystal alignment pattern in which a direction of an optical axis derived from a liquid crystal compound changes while continuously rotating in at least one in-plane direction, in a cross-section of the cholesteric liquid crystal layer observed with a scanning electron microscope, bright portions and dark portions derived from the cholesteric liquid crystalline phase are tilted at 80° or more with respect to a main surface of the cholesteric liquid crystal layer.
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公开(公告)号：US20210311352A1
公开(公告)日：2021-10-07
申请号：US17343821
申请日：2021-06-10
Applicant: FUJIFILM Corporation
Inventor： Katsumi SASATA , Hiroshi SATO , Yukito SAITOH
IPC: G02F1/1335 , G02F1/13363 , G02B27/02 , F21V8/00
Abstract: Provided are a liquid crystal diffraction element that can make the brightness of light emitted from a light guide plate uniform and a light guide element. The liquid crystal diffraction element includes: an optically-anisotropic layer that is formed of a composition including a liquid crystal compound, in which the optically-anisotropic layer has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound continuously rotates in at least one in-plane direction, and a diffraction efficiency of the optically-anisotropic layer increases from one side to another side in the one in-plane direction.
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公开(公告)号：US20210311259A1
公开(公告)日：2021-10-07
申请号：US17344181
申请日：2021-06-10
Applicant: FUJIFILM Corporation
Inventor： Hiroshi SATO , Yukito SAITOH , Katsumi SASATA
Abstract: Provided are a light guide element in which incidence light can be emitted with high use efficiency and a wide FOV can be obtained for use in AR glasses, and an image display device and a sensing apparatus that include the light guide element. The light guide element includes a light guide plate and first to third diffraction elements, in which the first diffraction element diffracts incidence light in two or more different directions to be incident into the light guide plate, the second diffraction element includes a plurality of diffraction elements that diffract the light to the third diffraction element, the third diffraction element emits the light from the light guide plate, and at least one of the first diffraction element or the third diffraction element has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound changes while continuously rotating in at least one in-plane direction.
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公开(公告)号：US20210149256A1
公开(公告)日：2021-05-20
申请号：US17158741
申请日：2021-01-26
Applicant: FUJIFILM Corporation
Inventor： Hiroshi SATO , Yukito SAITOH
IPC: G02F1/1337 , G02F1/1335
Abstract: Provided are a method of manufacturing an optical element in which an optically-anisotropic layer having a small amount of in-plane unevenness can be prepared, and an optical element. The method of manufacturing an optical element is a method of manufacturing an optical element, the optical element including an optically-anisotropic layer that is formed using a liquid crystal composition including a liquid crystal compound, an alignment film that aligns the liquid crystal compound, and a support, the method including: an alignment film forming step of forming the alignment film on one surface of the support; and an optically-anisotropic layer forming step of forming the optically-anisotropic layer on the alignment film, in which the alignment film includes a photo-alignable material, the alignment film forming step includes an exposure step of exposing different in-plane positions of the alignment film to light components having different polarization directions, and the support has a light absorption band that overlaps a light absorption band where a photochemical reaction occurs in the alignment film by irradiating the alignment film with the polarized light in the exposure step.
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