公开(公告)号：US20230314679A1

公开(公告)日：2023-10-05

申请号：US18297377

申请日：2023-04-07

Applicant: FUJIFILM Corporation

Inventor： Naoyoshi YAMADA ,  Yohei HAMACHI

IPC: G02B5/20 ,  G02B1/11 ,  G02B5/30

CPC classification number: G02B5/3016 ,  G02B1/11 ,  G02B5/208 ,  G02B5/3083

Abstract: An object of the present invention is to provide a laminated optical film including a reflective circular polarizer with high image sharpness of a reflected image, and an image display device formed of the laminated optical film. The object is achieved by providing the laminated optical film including at least a reflective circular polarizer, a retardation layer that converts circularly polarized light into linearly polarized light, and a linear polarizer in this order, in which a surface of the reflective circular polarizer on a side opposite to the linear polarizer has a surface roughness Ra of 100 nm or less.

公开(公告)号：US20240411075A1

公开(公告)日：2024-12-12

申请号：US18807047

申请日：2024-08-16

Applicant: FUJIFILM Corporation

Inventor： Naoyoshi YAMADA ,  Ryuji SANETO ,  Katsumi SASATA ,  Takehiro KASAHARA ,  Yohei HAMACHI

IPC: G02B5/30 ,  G02B1/08 ,  G02B27/01

Abstract: Provided are an optical laminate in which, for example, in a case of being applied to a pancake lens-type virtual reality display apparatus, light leakage can be reduced by canceling out expression of phase difference, change in phase difference, and the like caused by molding into a curved surface; an optical lens including the optical laminate; and a virtual reality display apparatus using the optical lens.
The optical laminate includes a first optically anisotropic layer containing a negative birefringent resin, and a specific layer selected from the group consisting of a third optically anisotropic layer which is formed by immobilizing a uniformly aligned liquid crystal compound and a cholesteric liquid crystal layer which is formed by immobilizing a helically aligned liquid crystal compound, in which the first optically anisotropic layer and the specific layer have a curved surface portion.

公开(公告)号：US20250035830A1

公开(公告)日：2025-01-30

申请号：US18890877

申请日：2024-09-20

Applicant: FUJIFILM Corporation

Inventor： Ryuji SANETO ,  Naoyoshi YAMADA ,  Yohei HAMACHI ,  Takehiro KASAHARA

IPC: G02B5/30 ,  B29D11/00 ,  B29K105/00

Abstract: An object of the present invention is to provide a forming method capable of obtaining an optical film in which occurrence of ghost can be suppressed in a case of being used in, for example, a virtual reality display apparatus; an optical film; a cholesteric liquid crystal layer; an optical laminate; and a production method of a curved-shaped optically functional layer. The object is achieved by a forming method including a heating step of heating an optical film, a forming step of pressing the optical film against a mold to deform the optical film, and a cutting step of cutting the optical film, in which the heating step is a step of heating the optical film by irradiating the optical film with infrared rays, and an irradiation amount of the infrared rays has a distribution in a plane of the optical film.

公开(公告)号：US20240255684A1

公开(公告)日：2024-08-01

申请号：US18619723

申请日：2024-03-28

Applicant: FUJIFILM Corporation

Inventor： Takashi YONEMOTO ,  Yukito SAITOH ,  Yohei HAMACHI ,  Makoto ISHIGURO

IPC: G02B5/30 ,  C09K19/50 ,  G02B27/00

CPC classification number: G02B5/3016 ,  C09K19/50 ,  G02B27/0018

Abstract: An object is to provide an optical system capable of improving the brightness of a main image while eliminating a ghost image. In an optical system including: an image display device that emits an image; a linear polarizer through which light associated with the image passes; a first quarter wavelength plate which receives the light from the linear polarizer; a half mirror; a reflective polarizer; and a second quarter wavelength plate provided between the reflective polarizer and the half mirror, retardance of the first quarter wavelength plate and retardance of the second quarter wavelength plate are equal, and thus the object is achieved.

公开(公告)号：US20220373729A1

公开(公告)日：2022-11-24

申请号：US17862967

申请日：2022-07-12

Applicant: FUJIFILM Corporation

Inventor： Takashi YONEMOTO ,  Yukito SAITOH ,  Yohei HAMACHI ,  Makoto ISHIGURO

IPC: G02B5/30 ,  G02B27/00 ,  C09K19/50

Abstract: An object is to provide an optical system capable of improving the brightness of a main image while eliminating a ghost image. In an optical system including: an image display device that emits an image; a linear polarizer through which light associated with the image passes; a first quarter wavelength plate which receives the light from the linear polarizer; a half mirror; a reflective polarizer; and a second quarter wavelength plate provided between the reflective polarizer and the half mirror, retardance of the first quarter wavelength plate and retardance of the second quarter wavelength plate are equal, and thus the object is achieved.

公开(公告)号：US20250085466A1

公开(公告)日：2025-03-13

申请号：US18958112

申请日：2024-11-25

Applicant: FUJIFILM Corporation

Inventor： Ryuji SANETO ,  Yohei HAMACHI ,  Kenta MIYAHARA

IPC: G02B5/30 ,  G06F3/01

Abstract: An object of the present invention is to provide an optical laminate that can be used for a reflective circular polarizer with little occurrence of a ghost in a case of being used in a virtual reality display device, an electronic finder, or the like, a laminated optical film including the reflective circular polarizer, an optical article including the optical laminate, and a virtual reality display device including the optical article.
The optical laminate according to the embodiment of the present invention includes, in the following order, a first layer, a second layer, a third layer, and a fourth layer, in which all of the first layer to the fourth layer are cholesteric liquid crystal layers, all of the first layer to the fourth layer have light reflectivity, a central wavelength of reflected light of the first layer is within a range of 430 to 570 nm, a central wavelength of reflected light of the second layer is within a range of 550 to 670 nm, a central wavelength of reflected light of the third layer is within a range of 430 to 570 nm, a central wavelength of reflected light of the fourth layer is within a range of 550 to 670 nm, a sign of a retardation of the first layer in a film thickness direction at a wavelength of 550 nm and a sign of a retardation of the second layer in a film thickness direction at a wavelength of 550 nm are opposite to each other, and a sign of a retardation of the third layer in a film thickness direction at a wavelength of 550 nm and a sign of a retardation of the fourth layer in a film thickness direction at a wavelength of 550 nm are opposite to each other.

公开(公告)号：US20250035986A1

公开(公告)日：2025-01-30

申请号：US18913432

申请日：2024-10-11

Applicant: FUJIFILM Corporation

Inventor： Naoyoshi YAMADA ,  Ryuji SANETO ,  Yohei HAMACHI

IPC: G02F1/13363 ,  G02B1/08 ,  G02F1/1333

Abstract: An object of the present invention is to provide an optically functional film in which expression of a phase difference and a change in phase difference in a case of being formed into a three-dimensional shape including a curved surface are suppressed, and for example, in a case of being applied to a pancake lens-type virtual reality display apparatus, it is possible to reduce light leakage. Another object of the present invention is to provide an optical laminate including the above-described optically functional film, a formed product, a manufacturing method of an optical component, an optical component, and a virtual reality display apparatus.
The optically functional film of the present invention is an optically functional film obtained by forming a composition which contains at least a liquid crystal compound having a polymerizable group, in which a polymerization rate of the liquid crystal compound is 40% or less. In addition, the optical laminate, the formed product, the manufacturing method of an optical component, the optical component, and the virtual reality display apparatus of the present invention include the above-described optically functional film.

公开(公告)号：US20240111198A1

公开(公告)日：2024-04-04

申请号：US18514471

申请日：2023-11-20

Applicant: FUJIFILM Corporation

Inventor： Ryuji SANETO ,  Yujiro YANAI ,  Yohei HAMACHI ,  Akira MARUYAMA

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

CPC classification number: G02F1/13718 ,  G02F1/133502 ,  G02F1/133635 ,  G02F1/133638

Abstract: An object of present invention is to provide an optical laminate that can be used for a reflective circular polarizer with little occurrence of a ghost in a case of being used in a virtual reality display device, an electronic finder, or the like; a laminated optical film including the reflective circular polarizer; an optical article including the optical laminate; and a virtual reality display device including the optical article. The optical laminate of the present invention includes two or more laminated reflective layers, in which the laminated reflective layer includes one reflective layer A that includes at least one or more cholesteric liquid crystal layers formed of a first liquid crystal compound which substantially consists of a rod-like liquid crystal compound and that does not include a cholesteric liquid crystal layer formed of a second liquid crystal compound which substantially consists of a disk-like liquid crystal compound, and one reflective layer B that includes at least one or more cholesteric liquid crystal layers formed of the second liquid crystal compound which substantially consists of a disk-like liquid crystal compound and that does not include a cholesteric liquid crystal layer formed of the first liquid crystal compound which substantially consists of a rod-like liquid crystal compound, and predetermined requirements are satisfied.