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1. 发明授权

US12044913B2 Optical laminate, light guide element, and AR display device 有权
公开(公告)号：US12044913B2
公开(公告)日：2024-07-23
申请号：US17226168
申请日：2021-04-09
申请人： FUJIFILM Corporation
发明人： Yukito Saitoh , Hiroshi Sato , Katsumi Sasata
IPC分类号： G02F1/11 , G02F1/1335 , G02F1/137
CPC分类号： G02F1/116 , G02F1/133541 , G02F1/133543 , G02F1/13718 , G02F2201/343
摘要： Provided are an optical laminate in which a large diffraction angle can be obtained, a light guide element, and an AR display device. The optical laminate includes, in the following order: a first optically-anisotropic 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; a cholesteric liquid crystal layer that is obtained by immobilizing a cholesteric liquid crystalline phase; and a second optically-anisotropic 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 continuously rotates in at least one in-plane direction, in which in the first optically-anisotropic layer and the second optically-anisotropic layer, the one in-plane directions in which the direction of the optical axis derived from the liquid crystal compound continuously rotates are the same, and rotation directions of the direction of the optical axis derived from the liquid crystal compound in the one in-plane direction are the same.

2. 发明授权

US11988880B2 Optical coupling system and optical communication device 有权
公开(公告)号：US11988880B2
公开(公告)日：2024-05-21
申请号：US17886535
申请日：2022-08-12
申请人： FUJIFILM Corporation
发明人： Yukito Saitoh , Katsumi Sasata , Hiroshi Sato
IPC分类号： G02B6/42 , H04B10/50
CPC分类号： G02B6/4213 , H04B10/501
摘要： Provided are a small-sized optical coupling system and an optical communication device using the optical coupling system. An optical coupling system includes a liquid crystal optical element, and a photonic device having a plurality of photonic chips, and couples an optical fiber to the photonic device, in which each of the photonic chips includes a grating coupler, the liquid crystal optical element separates incident signal light depending on at least one of polarization or a wavelength to emit light in different directions, and each separated signal light component is incident into the grating coupler of the corresponding photonic chip.

3. 发明授权

US11977290B2 Liquid crystal diffraction element, optical element, image display unit, head-mounted display, beam steering, and sensor 有权
$Liquid crystal diffraction element, optical element, image display unit, head-mounted display, beam steering, and sensor$
公开(公告)号：US11977290B2
公开(公告)日：2024-05-07
申请号：US18176529
申请日：2023-03-01
申请人： FUJIFILM Corporation
发明人： Hiroshi Sato , Yukito Saitoh , Takashi Yonemoto , Makoto Ishiguro
IPC分类号： G02F1/1335 , G02B5/30 , G02F1/1337
CPC分类号： G02F1/133504 , G02F1/133541 , G02F1/133761 , G02B5/3083
摘要： 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.

4. 发明授权

US11860504B2 Optical scanning device 有权
公开(公告)号：US11860504B2
公开(公告)日：2024-01-02
申请号：US17849167
申请日：2022-06-24
申请人： FUJIFILM Corporation
发明人： Yukito Saitoh , Hiroshi Sato
IPC分类号： G02F1/29 , G02F1/1335
CPC分类号： G02F1/29 , G02F1/133504
摘要： Provided is an optical scanning device having a stable scanning direction corresponding to a temperature fluctuation of a semiconductor laser by being provided with a predetermined liquid crystal optical element utilizing a characteristic of a linear expansion coefficient of a support of a liquid crystal diffraction element. An optical scanning device includes: a light source; and a light deflection element, in which the light deflection element includes a support and an optically anisotropic layer which is a cured layer of a liquid crystal composition, an optical axis of a liquid crystal compound contained in the liquid crystal composition is parallel to a surface of the optically anisotropic layer, and the optically anisotropic layer has a liquid crystal alignment pattern which is arranged along at least one in-plane direction of the optically anisotropic layer and in which an orientation of the optical axis of the liquid crystal compound changes continuously and rotationally, and the support satisfies Conditional Expression (1): |dλ/(dt×λ0)−α|

5. 发明授权

US11852940B2 Optically anisotropic film, optical element, and optical system 有权
公开(公告)号：US11852940B2
公开(公告)日：2023-12-26
申请号：US18067250
申请日：2022-12-16
申请人： FUJIFILM Corporation
发明人： Takashi Yonemoto , Yukito Saitoh , Hiroshi Sato , Yuki Fukushima , Mitsuyoshi Ichihashi , Keisuke Kodama , Shunya Katoh , Naoto Yanase
IPC分类号： G02F1/137 , G02B5/30
CPC分类号： G02F1/13706 , G02B5/3016
摘要： 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.

6. 发明公开

US20230204968A1 IMAGE DISPLAY UNIT AND HEAD-MOUNTED DISPLAY 审中-公开
公开(公告)号：US20230204968A1
公开(公告)日：2023-06-29
申请号：US18172807
申请日：2023-02-22
申请人： FUJIFILM Corporation
发明人： Hiroshi SATO , Yukito Saitoh , Takashi Yonemoto
IPC分类号： G02B27/28 , G02B27/42 , G02B5/30 , G06F1/16
CPC分类号： G02B27/281 , G02B27/4205 , G02B5/3016 , G06F1/163 , G02B5/3083
摘要： Provided are an image display unit and a head-mounted display where the size is small, the light utilization efficiency is high, and a decrease in image quality is small. The image display unit includes: an image display apparatus; a polarization diffraction element that diffracts light emitted from the image display apparatus; and a polarizing plate that allows transmission of the polarized light diffracted by the polarization diffraction element and absorbs light not diffracted by the polarization diffraction element, in which the polarization diffraction element is a polarization diffraction lens having a lens function, and in a case where a focal length of the polarization diffraction lens is represented by f and a distance between the image display apparatus and the polarization diffraction lens is represented by d, d≤f is satisfied.

7. 发明授权

US11435629B2 Optical element, light guide element, and image display device 有权
公开(公告)号：US11435629B2
公开(公告)日：2022-09-06
申请号：US16913897
申请日：2020-06-26
申请人： FUJIFILM Corporation
发明人： Hiroshi Sato , Yukito Saitoh , Katsumi Sasata
IPC分类号： G02F1/1347
摘要： An object is to provide an optical element in which a wavelength dependence of reflection is small, a light guide element including the optical element, and an image display device including the light guide element. The optical element includes a plurality of cholesteric liquid crystal layers having different selective reflection center wavelengths, 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 length over which the optical axis rotates by 180° in the in-plane direction is set as a single period, a permutation of lengths of selective reflection center wavelengths and a permutation of lengths of the single periods match each other in the cholesteric liquid crystal layers.

8. 发明授权

US11385390B2 Optical element and light guide element 有权
公开(公告)号：US11385390B2
公开(公告)日：2022-07-12
申请号：US17062952
申请日：2020-10-05
申请人： FUJIFILM Corporation
发明人： Hiroshi Sato , Yukito Saitoh
IPC分类号： G02B5/30 , F21V8/00
摘要： An object is to provide an optical element in which a wavelength dependence of refraction of transmitted light is small, and a light guide element including the optical element. The object can be achieved with an optical element including: a plurality of optically-anisotropic members including an optically-anisotropic layer that is formed using a liquid crystal compound and has a liquid crystal alignment pattern in which an optical axis rotates in an in-plane direction; and a wavelength selective phase difference layer that is disposed between two optically-anisotropic members and converts circularly polarized light in a specific wavelength range into circularly polarized light having an opposite turning direction, the optically-anisotropic layers of one optically-anisotropic member have the same liquid crystal alignment pattern, in a case where a length over which the direction of the optical axis rotates by 180° is set as a single period, the length of the single period in one or more optically-anisotropic members is different from that of another optically-anisotropic member, the liquid crystal compound of the optically-anisotropic layer is twisted and aligned, and the at least one optically-anisotropic member includes two optically-anisotropic layers having opposite twisted directions of twisted alignments of the liquid crystal compounds.

9. 发明授权

US11003026B2 Stereoscopic image display device and wearable display device 有权
公开(公告)号：US11003026B2
公开(公告)日：2021-05-11
申请号：US16728439
申请日：2019-12-27
申请人： FUJIFILM Corporation
发明人： Hiroshi Sato , Yukito Saitoh
IPC分类号： G02F1/13363 , G02F1/1335
摘要： Provided are a thin stereoscopic image display device that can also deal with a requirement for flexibility and a wearable display device including this stereoscopic image display device. The stereoscopic image display device includes a display panel, an optical element, and a circularly polarizing plate, in which the optical element includes an optically-anisotropic layer that is formed of a liquid crystal compound, 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 of the optically-anisotropic layer, and circularly polarized light emitted from the display panel is caused to advance in a direction different from a direction in which the circularly polarized light component is incident.

10. 发明授权

US10996510B2 Planar lighting device and liquid crystal display device 有权
公开(公告)号：US10996510B2
公开(公告)日：2021-05-04
申请号：US16856618
申请日：2020-04-23
申请人： FUJIFILM Corporation
发明人： Naoyoshi Yamada , Yukito Saitoh
IPC分类号： G02F1/1335 , G02F1/13357
摘要： The planar lighting device includes: a light source; and a brightness homogenizing member that has a laminate structure including high refractive index layers and low refractive index layers, and a light incidence portion that allows light emitted from each of the plurality of point light sources to be incident into the high refractive index layers is provided at a position of the laminate structure facing the point light source. The light incidence portion is formed of a hollow portion that is provided across the two or more high refractive index layers included in the laminate structure to penetrate at least one high refractive index layer and has a function of allowing the light to be incident into the high refractive index layers, and each of the high refractive index layers includes a light extraction mechanism that is provided at a position spaced apart from the light incidence portion.

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