公开(公告)号：US12130437B2

公开(公告)日：2024-10-29

申请号：US17849181

申请日：2022-06-24

申请人： FUJIFILM Corporation

发明人： Hiroshi Sato ,  Katsumi Sasata ,  Yukito Saitoh

IPC分类号： G02B27/01 ,  G02F1/1335 ,  G02F1/1337

CPC分类号： G02B27/0172 ,  G02F1/133504 ,  G02F1/133543 ,  G02F1/1337 ,  G02B2027/0178

摘要： 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.

公开(公告)号：US12124061B2

公开(公告)日：2024-10-22

申请号：US17702010

申请日：2022-03-23

申请人： FUJIFILM Corporation

发明人： Fumitake Mitobe ,  Yukito Saitoh ,  Hiroshi Sato ,  Katsumi Sasata ,  Akiko Watano

IPC分类号： G02B5/18 ,  G02B5/30

CPC分类号： G02B5/1857 ,  G02B5/3016

摘要： 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

公开(公告)号：US12032167B2

公开(公告)日：2024-07-09

申请号：US17957334

申请日：2022-09-30

申请人： FUJIFILM Corporation

发明人： Hiroshi Sato ,  Yukito Saitoh

IPC分类号： G02B27/01 ,  G02F1/1335 ,  G02F1/13363

CPC分类号： G02B27/0172 ,  G02F1/133504 ,  G02F1/133543 ,  G02F1/13355 ,  G02F1/133638

摘要： 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; 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.

公开(公告)号：US11815706B2

公开(公告)日：2023-11-14

申请号：US17158772

申请日：2021-01-26

申请人： FUJIFILM Corporation

发明人： Hiroshi Sato ,  Yukito Saitoh

IPC分类号： G02B5/18 ,  G02B1/11

CPC分类号： G02B5/1857 ,  G02B1/11

摘要： 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 includes a reflection suppressing portion that suppresses reflection of light in a wavelength range of at least a part of a light absorption band where a photochemical reaction occurs in the alignment film by irradiating a surface opposite to a surface where the alignment film is formed with the polarized light in the exposure step.

公开(公告)号：US11796880B2

公开(公告)日：2023-10-24

申请号：US17521595

申请日：2021-11-08

申请人： FUJIFILM Corporation

发明人： Yukito Saitoh ,  Katsumi Sasata ,  Hiroshi Sato

IPC分类号： G02F1/137 ,  G02B5/18 ,  G02F1/29

CPC分类号： G02F1/13718 ,  G02B5/1814 ,  G02F1/292

摘要： Provided are a liquid crystal diffraction element that diffracts incident light while allowing transmission of the incident light and has wavelength selectivity, and a laminated diffraction element. The liquid crystal diffraction element includes: a first cholesteric liquid crystal layer obtained by cholesteric alignment of a liquid crystal compound; and a second cholesteric liquid crystal layer that is laminated on the first cholesteric liquid crystal layer, in which the first cholesteric liquid crystal layer and the second cholesteric liquid crystal layer have 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 selective reflection wavelength of the first cholesteric liquid crystal layer and a selective reflection wavelength of the second cholesteric liquid crystal layer are the same, and in a case where a length over which the direction of the optical axis derived from the liquid crystal compound in the liquid crystal alignment pattern rotates by 180° in a plane is set as a single period, a single period of the liquid crystal alignment pattern of the first cholesteric liquid crystal layer and a single period of the liquid crystal alignment pattern of the second cholesteric liquid crystal layer are different from each other.

公开(公告)号：US11693278B2

公开(公告)日：2023-07-04

申请号：US17702909

申请日：2022-03-24

申请人： FUJIFILM Corporation

发明人： Yukito Saitoh ,  Keisuke Kodama ,  Hiroshi Sato ,  Katsumi Sasata

IPC分类号： G02F1/1337 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/137

CPC分类号： G02F1/133788 ,  G02F1/13718 ,  G02F1/133504 ,  G02F1/133636

摘要： Provided are a liquid crystal diffraction element which exhibits low scattering and high sharpness of diffracted light, and a method for producing the same. A liquid crystal diffraction element having an alignment film which has a periodic pattern and also having a cholesteric liquid crystal layer, in which: the periodic pattern is imparted to the alignment film as a result of alignment elements having different tilt angles being periodically arranged in the alignment film or the alignment elements being arranged in a manner such that the azimuth direction thereof swings in one in-plane direction; the direction of the molecular axis of a liquid crystal compound changes while continuously rotating and in at least one in-plane direction on at least one main surface among the pair of main surfaces of the cholesteric liquid crystal layer; the molecular axis of the liquid crystal compound is tilted with respect to the main surfaces of the cholesteric liquid crystal layer; and an arrangement direction of bright portion and dark portion derived from the cholesteric liquid crystalline phase observed by a scanning electron microscope in a cross section perpendicular to the main surfaces is tilted with respect to the main surfaces of the cholesteric liquid crystal layer.

公开(公告)号：US11650448B2

公开(公告)日：2023-05-16

申请号：US17343821

申请日：2021-06-10

申请人： FUJIFILM Corporation

发明人： Katsumi Sasata ,  Hiroshi Sato ,  Yukito Saitoh

IPC分类号： G02F1/1335 ,  F21V8/00 ,  G02B27/02 ,  G02F1/13363

CPC分类号： G02F1/133504 ,  G02B6/0023 ,  G02B27/022 ,  G02F1/13363

摘要： 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.

公开(公告)号：US11609476B2

公开(公告)日：2023-03-21

申请号：US17034625

申请日：2020-09-28

申请人： FUJIFILM Corporation

发明人： Yukito Saitoh ,  Hiroshi Sato

IPC分类号： G02F1/29 ,  G02F1/1337 ,  G02F1/1335

摘要： An object of the present invention 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. The object can be achieved with a light deflection device including: a light deflection element that deflects incident light in one direct to be emitted; a driving unit that drives the light deflection element; and a diffraction element that is disposed on a light emission side of the light deflection element in which a periodic structure pitch gradually changes from a center of deflection from the light deflection element toward an outside.

公开(公告)号：US11474287B2

公开(公告)日：2022-10-18

申请号：US17034512

申请日：2020-09-28

申请人： FUJIFILM Corporation

发明人： Yukito Saitoh ,  Hiroshi Sato ,  Ayako Muramatsu

IPC分类号： G02B5/18 ,  G02B5/30 ,  G02F1/11 ,  G02F1/1337

摘要： Provided is an optical element with which a high diffraction efficiency can be obtained with a simple configuration. The optical element includes: an optically-anisotropic layer that is formed using 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 changes while continuously rotating in at least one in-plane direction, and the optically-anisotropic layer has a region in which an alignment direction of a liquid crystal compound in at least one of upper and lower interfaces has a pre-tilt angle with respect to the interface.

公开(公告)号：US11460729B2

公开(公告)日：2022-10-04

申请号：US17158761

申请日：2021-01-26

申请人： FUJIFILM Corporation

发明人： Yukito Saitoh ,  Hiroshi Sato

IPC分类号： G02F1/1335 ,  G01D5/26 ,  G02F1/137

摘要： Provided are a novel optical element that can be used as a sensor or the like and a sensor including the same optical element. The optical element includes a cholesteric liquid crystal layer, 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, and in a case where a cross-section taken in a thickness direction conforming the in-plane direction in which the direction of the optical axis rotates is observed using a scanning electron microscope, a portion where a bright line and a dark line derived from the cholesteric liquid crystalline phase are discontinuous is provided in the cholesteric liquid crystal layer in the in-plane direction in which the direction of the optical axis rotates.