公开(公告)号：US20130216733A1

公开(公告)日：2013-08-22

申请号：US13804464

申请日：2013-03-14

Applicant: FUJIFILM CORPORATION

Inventor： Katsumi SASATA ,  Hajime NAKAYAMA

IPC: G02F1/1335 ,  G02B5/30

CPC classification number: G02F1/133528 ,  B29C48/0018 ,  B29C48/08 ,  B29C48/91 ,  B29C48/914 ,  G02B5/30 ,  G02B5/305 ,  G02B5/3083 ,  Y10T428/1041 ,  Y10T428/24975 ,  Y10T428/31891

Abstract: An optical film having an acrylic resin layer and a cellulose acylate layer, wherein the weight-average molecular weight of the acrylic resin used as the main ingredient in the acrylic resin layer is from 600,000 to 4,000,000, hardly causes display unevenness when it is incorporated in a liquid crystal display device.

Abstract translation: 一种具有丙烯酸树脂层和纤维素酰化物层的光学膜，其中用作丙烯酸树脂层中主要成分的丙烯酸树脂的重均分子量为600,000至400,000，当其被引入时几乎不引起显示不均匀 液晶显示装置。

公开(公告)号：US20240094579A1

公开(公告)日：2024-03-21

申请号：US18492603

申请日：2023-10-23

Applicant: FUJIFILM Corporation

Inventor： Fumitake MITOBE ,  Katsumi SASATA ,  Yukito SAITOH ,  Akiko WATANO

IPC: G02F1/1335 ,  G02F1/137

CPC classification number: G02F1/133524 ,  G02F1/133504 ,  G02F1/13718 ,  G02B27/0172

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.

公开(公告)号：US20240077664A1

公开(公告)日：2024-03-07

申请号：US18493881

申请日：2023-10-25

Applicant: FUJIFILM Corporation

Inventor： Hiroshi SATO ,  Katsumi SASATA ,  Yukito SAITOH

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

CPC classification number: G02B5/3016 ,  G01S7/481 ,  G02B5/283 ,  G02B5/305 ,  G02F1/133543 ,  G02F2201/343

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：US20240045334A1

公开(公告)日：2024-02-08

申请号：US18484514

申请日：2023-10-11

Applicant: FUJIFILM Corporation

Inventor： Hiroshi SATO ,  Takashi YONEMOTO ,  Katsumi SASATA

IPC: G03F7/20 ,  G02B5/30 ,  G02B5/18 ,  G02F1/1337

CPC classification number: G03F7/20 ,  G02B5/30 ,  G02B5/18 ,  G02F1/133788

Abstract: An object is to provide an exposure method of a photoalignment layer in which an alignment pattern having no disorder can be formed.
The exposure method of a photoalignment layer includes an exposure step of disposing an exposure mask and a substrate that includes a coating film including a compound having a photo-aligned group such that the exposure mask and the coating film face each other, irradiating the exposure mask with light to which the compound is photosensitive, and exposing the coating film through the exposure mask, in which the exposure mask is a polarization diffraction element having an alignment pattern where an optical axis changes while continuously rotating in at least one in-plane direction, in an image obtained by observing a cross section taken in a thickness direction along the one in-plane direction with a scanning electron microscope, the exposure mask has a bright portion and a dark portion extending from one main surface to another main surface, and has a region where the dark portion is tilted with respect to a perpendicular direction of a main surface, and in the exposure step, the coating film is exposed to light diffracted by the exposure mask.

公开(公告)号：US20230288719A1

公开(公告)日：2023-09-14

申请号：US18065044

申请日：2022-12-13

Applicant: FUJIFILM Corporation

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

IPC: G02B27/42 ,  G02B27/01 ,  F21V8/00

CPC classification number: G02B27/4272 ,  G02B6/0016 ,  G02B27/0172 ,  G02B2027/0178

Abstract: An optical element includes a light guide plate, an incidence portion, and an emission portion, in which the incidence/emission portion includes an Λ1 diffraction element having a diffraction period Λ1, an Λ2 diffraction element having a diffraction period Λ2, and an Λ3 diffraction element having a diffraction period Λ3, “Λ1:Λ2:Λ3 = 1: 1/√2± 0.015: ½ ± 0.015” is satisfied, an angle between periodic directions of the Λ1 diffraction element and the Λ2 diffraction element and an angle between periodic directions of the Λ2 diffraction element and the Λ3 diffraction element is 45° or 135° (± 0.5°), and an angle between the periodic directions of the Λ2 diffraction elements in the incidence portion and the emission portion is any one of 0°, 90°, 180°, or 270° (± 0.5°).

公开(公告)号：US20230236353A1

公开(公告)日：2023-07-27

申请号：US18192119

申请日：2023-03-29

Applicant: FUJIFILM Corporation

Inventor： Akiko WATANO ,  Ryuji SANETO ,  Katsumi SASATA ,  Fumitake MITOBE ,  Hiroshi SATO ,  Yukito SAITOH

IPC: F21V8/00 ,  G02B27/01

CPC classification number: G02B6/0056 ,  G02B6/005 ,  G02B6/0026 ,  G02B27/0172 ,  G02B2027/0178 ,  G02B2027/0147

Abstract: Provided is an optical element that can display a clear image having no blurriness in AR glasses or the like. The optical element includes: a substrate; and a laminate that is provided on the substrate and where a plurality of liquid crystal layers obtained by aligning a liquid crystal compound are laminated, in which the liquid crystal layers 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, and in at least one of the liquid crystal layers, an arithmetic mean value of differences between maximum film thicknesses and minimum film thicknesses obtained by observing 10 cross-sections with a scanning electron microscope is 0.1 μm or less.

公开(公告)号：US20230168538A1

公开(公告)日：2023-06-01

申请号：US18159824

申请日：2023-01-26

Applicant: FUJIFILM Corporation

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

IPC: G02F1/1335

CPC classification number: G02F1/133543 ,  G02F1/133524 ,  G02F1/133536

Abstract: An optical element comprising: 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 the liquid crystal compound changes while continuously rotating in at least one in-plane direction, a helical pitch of a helical axis direction in the cholesteric alignment gradually changes in a thickness direction of the cholesteric liquid crystal layer, and the cholesteric liquid crystal layer has a peak of reflection at each of a first wavelength λ and a second wavelength λ/2.

公开(公告)号：US20220382000A1

公开(公告)日：2022-12-01

申请号：US17886535

申请日：2022-08-12

Applicant: FUJIFILM Corporation

Inventor： Yukito SAITOH ,  Katsumi SASATA ,  Hiroshi SATO

IPC: G02B6/42

Abstract: 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.

公开(公告)号：US20220291511A1

公开(公告)日：2022-09-15

申请号：US17824506

申请日：2022-05-25

Applicant: FUJIFILM Corporation

Inventor： Hiroshi SATO ,  Katsumi SASATA ,  Yukito SAITOH

IPC: G02B27/01 ,  G02B27/28 ,  F21V8/00 ,  G02F1/1335 ,  G02F1/137 ,  G02F1/13363

Abstract: An object is to provide: an optical member with which an image display apparatus where multiple images are suppressed can be obtained; and an image display apparatus including the optical member. The optical member includes: a light guide element that includes a light guide plate, first and second incidence diffraction elements, and first and second emission diffraction elements; a wavelength selective retardation layer that functions as a retardation layer with respect to a specific wavelength range, the wavelength selective retardation layer changing a polarized state of light diffracted by the first or second emission diffraction element; and a polarizer, in which the first and second emission diffraction elements are polarization diffraction elements and diffract light components such that the diffracted light components are polarized light components having opposite properties, the first and second emission diffraction elements, the wavelength selective retardation layer, and the polarizer are provided to overlap each other in a main surface of the light guide plate, and the wavelength selective retardation layer is provided between the light guide element and the polarizer.

公开(公告)号：US20220146742A1

公开(公告)日：2022-05-12

申请号：US17583433

申请日：2022-01-25

Applicant: FUJIFILM Corporation

Inventor： Fumitake MITOBE ,  Keisuke KODAMA ,  Katsumi SASATA ,  Yukito SAITOH

IPC: F21V8/00 ,  G02B5/18

Abstract: Provided are a backlight unit and a liquid crystal display device including the backlight unit, the backlight unit being capable of switching between viewing angles in the liquid crystal display device and having a configuration in which the brightness values of emitted light on the “+” side and the “−” side at a polar angle with respect to the normal line are symmetric to each other. The backlight unit includes: a light guide plate; a first light source that guides light into the light guide plate from a long side or a short side of the light guide plate; a second light source that guides light into the light guide plate from a side of the light guide plate different from that of the first light source; a first diffraction element that is provided on one main surface of the light guide plate and diffracts only light emitted from one of the first light source or the second light source; a second diffraction element that is provided on another main surface of the light guide plate and diffracts only light emitted from another one of the first light source or the second light source; and a reflection plate that is provided on a surface of the light guide plate opposite to a light emission surface.