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121.发明公开公开(公告)号：US20240036343A1
公开(公告)日：2024-02-01
申请号：US18482072
申请日：2023-10-06
Applicant: FUJIFILM Corporation
Inventor： Hiroshi SATO , Naoyoshi YAMADA , Yukito SAITOH , Takashi YONEMOTO
IPC: G02B27/42
CPC classification number: G02B27/42
Abstract: There is provided a liquid crystal diffraction element in which chromatic aberration is small and diffraction efficiency is high in the liquid crystal diffraction element, and an image display apparatus and a head mounted display which use this diffraction element. The liquid crystal diffraction element includes an optically anisotropic layer that is formed of a liquid crystal composition containing a liquid crystal compound, where 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 along at least one in-plane direction, and the optically anisotropic layer has at least a curved surface portion.
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122.发明公开公开(公告)号：US20240027783A1
公开(公告)日：2024-01-25
申请号：US18477697
申请日：2023-09-29
Applicant: FUJIFILM Corporation
Inventor： Takashi YONEMOTO , Hiroshi SATO , Yukito SAITOH
CPC classification number: G02B27/283 , G02B5/3016 , G02B1/08
Abstract: Provided are a beam combiner that can obtain a fine and clear interference pattern, a method of forming an alignment film in which a fine and clear alignment pattern can be obtained, and a method of manufacturing an optical element including a fine and clear liquid crystal alignment pattern. The beam combiner includes: a beam combiner element that emits light where light transmitted through a first surface and light reflected from a second surface are combined; a light control element that is provided on an upstream side of the beam combiner; and a polarization conversion layer that converts polarized light of the light emitted from the beam combiner element, in which an absolute value of an ellipticity of light emitted from the polarization conversion layer is 0.7 or more.
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123.发明公开公开(公告)号：US20230205044A1
公开(公告)日：2023-06-29
申请号：US18176738
申请日：2023-03-01
Applicant: FUJIFILM Corporation
Inventor： Hiroshi SATO , Yukito SAITOH , Takashi YONEMOTO
Abstract: An object is to provide a liquid crystal diffraction element that has small wavelength dependence of diffraction efficiency and diffracts light having the same wavelength at the same angle, 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 includes a liquid crystal compound, in which the optically-anisotropic layer has a liquid crystal alignment pattern in which a direction of an optical axis of the liquid crystal compound continuously rotates in one in-plane direction, and in an image obtained by observing a cross-section of the optically-anisotropic layer with a scanning electron microscope, the optically-anisotropic layer has bright portions and dark portions extending from one surface to another surface, each of the dark portions has two or more inflection points of angle, and the optically-anisotropic layer has regions where tilt directions of the dark portions are different from each other in the thickness direction.
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公开(公告)号：US20230125215A1
公开(公告)日：2023-04-27
申请号：US18067250
申请日：2022-12-16
Applicant: FUJIFILM Corporation
Inventor： Takashi YONEMOTO , Yukito SAITOH , Hiroshi SATO , Yuki FUKUSHIMA , Mitsuyoshi ICHIHASHI , Keisuke KODAMA , Shunya KATOH , Naoto YANASE
Abstract: An optically anisotropic film is formed of a liquid crystal composition including a liquid crystal compound and 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 of the optically anisotropic film, and the optically anisotropic film satisfies predetermined requirements.
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公开(公告)号：US20230049424A1
公开(公告)日：2023-02-16
申请号：US17937272
申请日：2022-09-30
Applicant: FUJIFILM Corporation
Inventor： Fumitake MITOBE , Katsumi SASATA , Yukito SAITOH , Akiko WATANO
IPC: G02F1/1335 , G02F1/137
Abstract: A light guide element includes: a light guide plate; and a diffraction element that is disposed on a main surface of the light guide plate, in which the diffraction element includes a liquid crystal layer that is formed of a liquid crystal composition including a liquid crystal compound and 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, a refractive index of the light guide plate is 1.70 or higher, and in a case where the refractive index of the light guide plate is represented by nd and a refractive index of the liquid crystal layer is represented by nk, nk−nd≥0 is satisfied.
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Patent Agency Ranking
公开(公告)号：US20230043783A1
公开(公告)日：2023-02-09
申请号：US17937370
申请日：2022-09-30
Applicant: FUJIFILM Corporation
Inventor： Katsumi SASATA , Fumitake MITOBE , Hiroshi SATO , Yukito SAITOH
IPC: G02F1/1335
Abstract: An optical element includes a light guide plate, an incidence portion, and an emission portion, in which each of the incidence portion and the emission portion includes diffraction portions, the diffraction portion includes diffraction elements, the diffraction element includes a liquid crystal diffraction layer in which a direction of an optical axis of a liquid crystal compound changes while continuously rotating in one in-plane direction, and in a case where the direction in which the direction of the optical axis changes is set as an in-plane rotation direction and a length over which the optical axis rotates by 180° is set as an in-plane period, in-plane rotation directions of liquid crystal diffraction layers of incidence diffraction elements in at least two of a plurality of the incidence diffraction portions are different from each other.
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公开(公告)号：US20220390723A1
公开(公告)日：2022-12-08
申请号：US17880061
申请日：2022-08-03
Applicant: FUJIFILM Corporation
Inventor： Hiroshi SATO , Yukito SAITOH
IPC: G02B15/14 , G02F1/1335 , G02B30/56 , G03H1/00
Abstract: Provided are an optical element and an image display apparatus that display an aerial image, in which the total volume of the apparatus is small, a reduction in size can realized, and a scenery can be recognized. The optical element includes: a light guide element including a light guide plate, an incidence diffraction element, and an emission diffraction element, the incidence diffraction element being disposed on a main surface of the light guide plate and the emission diffraction element being disposed on the main surface of the light guide plate; and a positive lens that is disposed at a position overlapping the emission diffraction element in a view from a direction perpendicular to the main surface of the light guide plate, in which the incidence diffraction element diffracts incident light such that the diffracted light is incident into the light guide plate, the emission diffraction element emits light propagating in the light guide plate from the light guide plate, and the positive lens collects the light that is emitted from the light guide plate by the emission diffraction element.
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公开(公告)号：US20220390663A1
公开(公告)日：2022-12-08
申请号：US17880068
申请日：2022-08-03
Applicant: FUJIFILM Corporation
Inventor： Hiroshi SATO , Yukito SAITOH
Abstract: Provided are an optical element and an image display apparatus that display an aerial image, in which the total volume of the apparatus is small, a reduction in size can realized, and a scenery can be recognized. The optical element includes: a light guide element including a light guide plate, an incidence diffraction element, and an emission diffraction element, the incidence diffraction element being disposed on a main surface of the light guide plate and the emission diffraction element being disposed on the main surface of the light guide plate; and a reflection lens that is disposed at a position overlapping the emission diffraction element in a view from a direction perpendicular to the main surface of the light guide plate, in which the incidence diffraction element diffracts incident light such that the diffracted light is incident into the light guide plate, the emission diffraction element emits light propagating in the light guide plate from the light guide plate, and the reflection lens collects the light that is emitted from the light guide plate by the emission diffraction element.
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129.发明申请公开(公告)号：US20220326526A1
公开(公告)日：2022-10-13
申请号：US17708606
申请日：2022-03-30
Applicant: FUJIFILM Corporation
Inventor： Makoto KAMO , Mayumi NOJIRI , Yukito SAITOH
Abstract: Provided are an image display apparatus; an image display system; a head-mounted display, and a patterned polarizer. The image display apparatus includes a light receiving section having sensitivity in an invisible range; an image display panel having a substrate and a plurality of pixels disposed thereon; and an emission surface that emits a luminous flux in a visible range, in which the light receiving section receives only invisible light in light incident into the image display apparatus through the emission surface, and is provided between the emission surface and the image display panel, on the image display panel, or on a side of the image display panel opposite the emission surface, and disposed at a position overlapping the image display panel viewed from a direction perpendicular to the emission surface, and a near infrared polarizer is provided between the light receiving section and the emission surface.
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公开(公告)号：US20220283465A1
公开(公告)日：2022-09-08
申请号：US17824125
申请日：2022-05-25
Applicant: FUJIFILM Corporation
Inventor： Hiroshi SATO , Katsumi SASATA , Yukito SAITOH
IPC: G02F1/1335 , G02F1/137 , G02F1/1337
Abstract: Provided are: a light guide element that includes an intermediate diffraction element to expand exit pupil such that a light utilization efficiency is high and a decrease in the brightness of an image to be displayed can be suppressed; and an image display apparatus. The light guide element includes a light guide plate, an incidence diffraction element, an intermediate diffraction element, and an emission diffraction element, in which the incidence diffraction element, the intermediate diffraction element, and the emission diffraction element include a liquid crystal layer that is formed of a composition including a liquid crystal compound and 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 cross-section of the liquid crystal layer observed with a SEM, bright portions and dark portions derived from a liquid crystal phase are tilted with respect to a main surface of the liquid crystal layer, and in a case where an interval between the bright portions or between the dark portions is represented by a ½ pitch, the pitch Pin of the incidence diffraction element and the pitch Pe of the intermediate diffraction element satisfy Pin
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