公开(公告)号：US20220214584A1

公开(公告)日：2022-07-07

申请号：US17702909

申请日：2022-03-24

Applicant: FUJIFILM Corporation

Inventor： Yukito SAITOH ,  Keisuke KODAMA ,  Hiroshi SATO ,  Katsumi SASATA

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

Abstract: 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：US20220214485A1

公开(公告)日：2022-07-07

申请号：US17704200

申请日：2022-03-25

Applicant: FUJIFILM Corporation

Inventor： Katsumi SASATA ,  Hiroshi SATO ,  Yukito SAITOH

IPC: G02B5/30 ,  F21V8/00 ,  G02B27/01

Abstract: Provided are an optical laminate where the occurrence of crosstalk can be suppressed and the occurrence of multiple images can be suppressed, a light guide element, and an image display apparatus. The optical laminate includes: a first cholesteric liquid crystal layer and a second cholesteric liquid crystal layer that are obtained by immobilizing a cholesteric liquid crystalline phase and have 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 the first and second cholesteric liquid crystal layers, turning directions of circularly polarized light to be reflected are opposite to each other, helical pitches P1 and P2 of the first and second cholesteric liquid crystal layers satisfy P1

公开(公告)号：US20220214476A1

公开(公告)日：2022-07-07

申请号：US17704066

申请日：2022-03-25

Applicant: FUJIFILM Corporation

Inventor： Katsumi SASATA ,  Akiko WATANO ,  Hiroshi SATO ,  Yukito SAITOH

IPC: G02B1/11 ,  G02B5/00 ,  H01S3/08 ,  G02B5/26 ,  G02B1/113

Abstract: Provided is a method of manufacturing an optical element in which aligning properties of an alignment pattern in a photo-alignment film is improved such that alignment defects of a liquid crystal compound in a liquid crystal layer can be suppressed. The method of manufacturing an optical element includes: an exposure step of performing interference exposure to a surface of a photo-alignment film including a photo-alignment material 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 liquid crystal layer forming step of applying a liquid crystal composition including a liquid crystal compound to the photo-alignment film where the alignment pattern is formed to form a liquid crystal layer, in which the photo-alignment material includes an azo compound, and the exposure step is performed in an environment having a relative humidity of 50% or less.

公开(公告)号：US20220146891A1

公开(公告)日：2022-05-12

申请号：US17584093

申请日：2022-01-25

Applicant: FUJIFILM Corporation

Inventor： Hiroshi SATO ,  Katsumi SASATA ,  Yukito SAITOH ,  Keisuke KODAMA

IPC: G02F1/1337 ,  G02F1/137

Abstract: Provided is a method of manufacturing an optical element and an optical element, in which an alignment pattern can be formed with high manufacturing efficiency and high accuracy, an increase in manufacturing time caused by an increase in size can be suppressed, and a liquid crystal compound can be appropriately aligned. The method is a method of manufacturing an optical element, the optical element including a liquid crystal layer that is formed of a liquid crystal composition including a liquid crystal compound, an alignment film that aligns the liquid crystal compound of the liquid crystal layer, and a support, the method including: an alignment film forming step of forming the alignment film having a periodic unevenness shape on the support, the unevenness shape having a tilted surface that is tilted with respect to a surface of the support; and a liquid crystal layer forming step of forming the liquid crystal layer on the alignment film.

公开(公告)号：US20220066264A1

公开(公告)日：2022-03-03

申请号：US17522457

申请日：2021-11-09

Applicant: FUJIFILM Corporation

Inventor： Yukito SAITOH ,  Hiroshi SATO ,  Katsumi SASATA ,  Takao TAGUCHI ,  Akiko WATANO

IPC: G02F1/1335 ,  G02F1/1337 ,  G02F1/139 ,  G02F1/1516

Abstract: Provided are an optical element with which reflected light in a narrower wavelength range can be obtained and a wavelength selective filter and a sensor including the same optical element. The optical element includes a cholesteric liquid crystal layer obtained by cholesteric alignment of a liquid crystal compound, 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 the cholesteric liquid crystal layer has a region where a refractive index nx in an in-plane slow axis direction and a refractive index ny in an in-plane fast axis direction satisfy nx>ny.

公开(公告)号：US20220066080A1

公开(公告)日：2022-03-03

申请号：US17522266

申请日：2021-11-09

Applicant: FUJIFILM Corporation

Inventor： Hiroshi SATO ,  Katsumi SASATA ,  Yukito SAITOH

IPC: G02B5/30 ,  G01S7/481 ,  G02B5/28 ,  G02F1/1335

Abstract: Provided is a sensor having a high SN ratio. The sensor includes a light source, a band pass filter, and a light-receiving element, in which the band pass filter includes two cholesteric liquid crystal layers and a discontinuous layer disposed between the two cholesteric liquid crystal layers, in the two cholesteric liquid crystal layers, helical twisted directions and helical pitches are the same, and in a case where the discontinuous layer is a layer other than a cholesteric liquid crystal layer and a wavelength having a lowest reflectivity in a selective reflection wavelength range of the band pass filter is represented by λm [nm], a thickness [nm] is in a range of “30×(λm/550) to 150×(λm/550)”.

公开(公告)号：US20220066030A1

公开(公告)日：2022-03-03

申请号：US17521983

申请日：2021-11-09

Applicant: FUJIFILM Corporation

Inventor： Takao TAGUCHI ,  Yukito SAITOH ,  Hiroshi SATO ,  Katsumi SASATA ,  Akiko WATANO

IPC: G01S17/08 ,  G02B1/08

Abstract: Provided is a sensor having a high SN ratio. The sensor includes a light source, a band pass filter; and a light-receiving element, in which the band pass filter includes a cholesteric liquid crystal layer that is a layer obtained by immobilizing a cholesteric liquid crystalline phase, the cholesteric liquid crystal layer has a region where a refractive index nx in an in-plane slow axis direction and a refractive index ny in an in-plane fast axis direction satisfy nx>ny, and in a case where a selective reflection wavelength of the cholesteric liquid crystal layer is represented by λ, the cholesteric liquid crystal layer has a second selective reflection peak at a wavelength λ/2 and a half-width of the second selective reflection peak at λ/2 is 30 nm or less.

公开(公告)号：US20210208316A1

公开(公告)日：2021-07-08

申请号：US17212351

申请日：2021-03-25

Applicant: FUJIFILM Corporation

Inventor： Hiroshi SATO ,  Yukito SAITOH ,  Katsumi SASATA

IPC: G02B5/02 ,  G02B5/30

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.

公开(公告)号：US20150183977A1

公开(公告)日：2015-07-02

申请号：US14642993

申请日：2015-03-10

Applicant: FUJIFILM Corporation

Inventor： Shigeaki NIMURA ,  Makoto KAMO ,  Shusuke ARITA ,  Yutaka NOZOE ,  Katsumi SASATA

IPC: C08L33/12 ,  G02F1/1335 ,  C08K5/3462 ,  B29D11/00 ,  C08K5/13 ,  C08L45/00

CPC classification number: C08L33/12 ,  B29D11/00644 ,  B29D11/00788 ,  B29K2023/38 ,  B29K2025/06 ,  B29K2025/08 ,  B29K2033/12 ,  B29K2105/0085 ,  B29K2267/04 ,  B29K2995/0018 ,  B29K2995/0068 ,  B29K2995/0069 ,  C08J5/18 ,  C08K5/13 ,  C08K5/3462 ,  C08L45/00 ,  G02B5/3033 ,  G02F1/1335 ,  G02F1/133528 ,  G02F2001/133311 ,  Y10T428/1036 ,  Y10T428/105 ,  Y10T428/265 ,  Y10T428/31786 ,  Y10T428/31935 ,  Y10T428/31938 ,  C08L25/12

Abstract: The optical film of the present invention is an optical film including a thermoplastic resin, in which the optical film has a moisture permeability of 70 g/m2/day or less (in terms of a film thickness of 40 μm), and contains a moisture permeability-reducing compound having a molecular weight of 200 or more and satisfying Formula (1) described below. Formula (1) A/B≦0.9 (A represents a moisture permeability of an optical film in a case in which 10 mass % of the moisture permeability-reducing compound is added to the mass of the thermoplastic resin, and B represents a moisture permeability of an optical film in a case in which the thermoplastic resin is included and the moisture permeability-reducing compound is not added.)

Abstract translation: 本发明的光学膜是含有热塑性树脂的光学膜，光学膜的透湿度为70g / m 2 /天以下（膜厚为40μm），含有水分 具有分子量为200以上且满足下述式（1）的透气性降低性化合物。 式（1）A / B＆nlE 0.9（A表示在热塑性树脂的质量中添加10质量％的透湿性降低化合物的情况下的光学膜的透湿性，B表示透湿性 在包含热塑性树脂并且不添加透湿性降低化合物的情况下的光学膜）。

公开(公告)号：US20140099452A1

公开(公告)日：2014-04-10

申请号：US14101660

申请日：2013-12-10

Applicant: FUJIFILM CORPORATION

Inventor： Hiroyuki KAWANISHI ,  Katsumi SASATA ,  Hajime NAKAYAMA ,  Ryo SUZUKI ,  Nobutaka FUKAGAWA

IPC: B29C41/32 ,  B29D11/00

CPC classification number: B29C41/32 ,  B29C41/26 ,  B29C41/28 ,  B29D11/0073 ,  B29D11/00788 ,  B29K2001/00 ,  B32B7/06 ,  B32B23/08 ,  B32B23/20 ,  B32B27/308 ,  B32B2255/10 ,  B32B2255/26 ,  B32B2307/42 ,  B32B2307/748 ,  B32B2457/202 ,  G02B5/3033 ,  Y10T428/105 ,  Y10T428/24942 ,  Y10T428/24967 ,  Y10T428/31971

Abstract: Provided is a method for manufacturing a peelable laminated film including a layer A including cellulose ester and a layer B including a resin capable of a solution film-formation different from the cellulose ester, the layer A and the layer B having an adhesion of 5 N/cm or less, the method including: simultaneously or sequentially casting and laminating a dope A for forming the layer A, which includes cellulose ester and a solvent, and a dope B for forming the layer B, which includes a resin capable of a solution film-formation different from the cellulose ester and a solvent, on a casting support, peeling off a laminate of the dope A and the dope B from the casting support, and drying the laminate.

Abstract translation: 本发明提供一种可剥离层合膜的制造方法，该层压膜包括含有纤维素酯的层A和包含能够与纤维素酯不同的溶液成膜的树脂的层B，层A和粘合力为5N的层B / cm以下，该方法包括：同时或依次浇铸和层压用于形成包含纤维素酯和溶剂的层A的涂料A和用于形成B层的涂料B，该涂料B包括能够溶解的树脂 在纤维素酯和溶剂上形成不同的成膜剂，在浇铸载体上，从浇铸载体上剥离涂料A和涂料B的层合物，并干燥层压体。