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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：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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Patent Agency Ranking
公开(公告)号：US20240369743A1
公开(公告)日：2024-11-07
申请号：US18773316
申请日：2024-07-15
Applicant: FUJIFILM Corporation
Inventor： Hiroshi SATO , Yukito SAITOH , Katsumi SASATA
Abstract: Provided are an optical element, including a plurality of optically anisotropic layers, each of which has an in-plane alignment pattern in which orientations of optical axes derived from a liquid crystal compound change continuously and rotationally along at least one in-plane direction, in a thickness direction, in which the optically anisotropic layers each have regions where lengths over which the orientations of the optical axes rotate by 180° in the one direction are different from each other, and at least one of the plurality of optically anisotropic layers is an inclined optically anisotropic layer having a region where a plurality of pairs of bright lines and dark lines in a cross-sectional image are present and the pairs of the bright lines and the dark lines are inclined at inclination angles which are different from each other with respect to a normal line of an interface of the optically anisotropic layer.
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公开(公告)号：US20220390680A1
公开(公告)日：2022-12-08
申请号：US17886540
申请日：2022-08-12
Applicant: FUJIFILM Corporation
Inventor： Yukito SAITOH , Katsumi SASATA , Hiroshi SATO
Abstract: Provided is an optical communication device, such as a wavelength locker, a wavelength demultiplexer, an optical coupling system, and an optical switching system, using a small-sized lens element. An optical communication device includes, as a lens element, a liquid crystal diffractive lens element having an optically anisotropic layer that is formed using a composition containing a liquid crystal compound, and has a liquid crystal alignment pattern in which an orientation of an optical axis of the liquid crystal compound changes while continuously rotating toward one direction, in a radial shape from an inside toward an outside, and in the liquid crystal alignment pattern, in a case where a length over which the orientation of the optical axis rotates by 180° in one direction in which the optical axis changes is a single period, a length of the single period gradually decreases from the inside toward the outside.
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公开(公告)号：US20220373809A1
公开(公告)日：2022-11-24
申请号：US17849181
申请日：2022-06-24
Applicant: FUJIFILM Corporation
Inventor： Hiroshi SATO , Katsumi SASATA , Yukito SAITOH
IPC: G02B27/01 , G02F1/1337 , G02F1/1335
Abstract: Provided are: an image display apparatus that can display augmented reality in a virtual image is superimposed on a bright real scene; and AR glasses including the image display apparatus. The image display apparatus includes: a display element; and a reflective polarization diffraction element that reflects an image displayed by the display element, in which the polarization diffraction element has a region where a period of a diffraction structure decreases in a direction away from the display element.
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公开(公告)号：US20220221630A1
公开(公告)日：2022-07-14
申请号：US17702010
申请日：2022-03-23
Applicant: FUJIFILM Corporation
Inventor： Fumitake MITOBE , Yukito SAITOH , Hiroshi SATO , Katsumi SASATA , Akiko WATANO
Abstract: Provided are a method of forming a photo-alignment film having a large size that can appropriately align a liquid crystal compound can be formed and a method of forming a liquid crystal layer having a large size in which alignment defects of a liquid crystal compound can be suppressed. The method of forming a photo-alignment film includes: an exposure step of irradiating a surface of a photo-alignment film including a photo-alignment material that is formed on a support with interference light formed by intersection of two light components such that the surface of the photo-alignment film is exposed to form, on the photo-alignment film, an 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; and a moving step of moving the support by a distance D in a direction parallel to the surface of the support and parallel to a straight line formed by optical axes of the two beams, in which the photo-alignment film is exposed by alternately repeating the exposure step and the moving step. Here, the distance D is represented by λ/{2×sin(α/2)}×N−λ/8
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公开(公告)号：US20220057638A1
公开(公告)日：2022-02-24
申请号：US17521027
申请日：2021-11-08
Applicant: FUJIFILM Corporation
Inventor： Hiroshi SATO , Katsumi SASATA , Yukito SAITOH
Abstract: Provided are a light guide element and an image display apparatus capable of suppressing the occurrence of multiple images. The light guide element includes a light guide plate and a first incidence diffraction element, a second incidence diffraction element, a first emission diffraction element, and a second emission diffraction element that are provided on the light guide plate, in which the first and second incidence diffraction elements diffract incident light in different directions to be incident into the light guide plate, the first emission diffraction element emits light that is diffracted by the first incidence diffraction element and propagates in the light guide plate, the second emission diffraction element emits light that is diffracted by the second incidence diffraction element and propagates in the light guide plate, a period of a diffraction structure of the first incidence diffraction element and a period of a diffraction structure of the second incidence diffraction element are different from each other, a period of a diffraction structure of the first emission diffraction element and a period of a diffraction structure of the second emission diffraction element are different from each other, the first and second emission diffraction elements are disposed at a position where the first and second emission diffraction elements overlap each other in a plane direction of a main surface of the light guide plate, and a periodic direction of the diffraction structure of the first emission diffraction element and a periodic direction of the diffraction structure of the second emission diffraction element intersect with each other.
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