Patents by Inventor Eiji Morikuni

Eiji Morikuni has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11422453
    Abstract: A lens has a first transmissive surface, a reflective surface, and a second transmissive surface sequentially arranged from a demagnifying side toward a magnifying side. The first transmissive surface and the reflective surface are located at the lower side of an imaginary axis extending in an axis-Z direction, and the second transmissive surface is located at the upper side of the imaginary axis. The reflective surface has a concave shape, and the second transmissive surface has a convex shape protruding toward the magnifying side. An imaginary line that connects an upper intersection to a lower intersection inclines with respect to an imaginary vertical line perpendicular to the imaginary axis in a plane YZ.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: August 23, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Eiji Morikuni
  • Patent number: 11409190
    Abstract: An optical element has a first member having a first refractive index and a second member having a second refractive index different from the first refractive index. The optical element has a first transmissive surface, a reflective surface, and a second transmissive surface arranged from a demagnifying side toward a magnifying side in order. The first transmissive surface and the reflective surface are located in one side with respect to an optical axis of the optical element. The second transmissive surface is located in the other side with respect to the optical axis of the optical element. the reflective surface has a concave shape.
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: August 9, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Eiji Morikuni
  • Publication number: 20220082783
    Abstract: An optical device includes a first optical system having an optical element, a second optical system having a lens and disposed at a reduction side of the first optical system, a first holding member holding the optical element, and a first movement mechanism configured to move the first holding member in optical axis directions along an optical axis of the optical element. The optical element has a reflection surface. The first movement mechanism has a fixing member supporting the first holding member rotatably around a rotation axis and a transport portion configured to move the first holding member along the optical axis directions according to rotation of the first holding member. The reflection surface has a shape rotationally symmetrical with respect to the rotation axis. The rotation axis and the optical axis are the same axis.
    Type: Application
    Filed: September 15, 2021
    Publication date: March 17, 2022
    Inventor: Eiji MORIKUNI
  • Publication number: 20220082912
    Abstract: An optical device includes a first optical system having an optical element, a second optical system having a lens and disposed at a reduction side of the first optical system, a first holding member holding the optical device, a second holding member holding the lens, and a movement mechanism configured to move the first holding member in optical axis directions. The optical element has a reflection surface. The first holding member has a first holding portion holding the optical element and a first coupling portion extending from the first holding portion to a second optical system side. The movement mechanism has a transport mechanism configured to move the first coupling portion along the optical axis directions, and a guide mechanism configured to guide the first holding member in the optical axis directions. The guide mechanism restricts rotation of the first holding member around the optical axis.
    Type: Application
    Filed: September 15, 2021
    Publication date: March 17, 2022
    Inventor: Eiji MORIKUNI
  • Publication number: 20220066295
    Abstract: An optical device includes a plurality of optical elements, a holding member configured to hold the plurality of optical elements, and a partition wall. The first optical element is a lens and disposed in a position closest to an enlargement side out of the plurality of optical elements. The first optical element has an incident surface, a reflecting surface configured to reflect light which enters through the incident surface, and an exit surface configured to emit the light reflected by the reflecting surface. The incident surface and the exit surface are provided to a first surface facing to a reduction side in the first optical element. The partition wall partitions the incident surface and the exit surface.
    Type: Application
    Filed: August 31, 2021
    Publication date: March 3, 2022
    Inventor: Eiji MORIKUNI
  • Publication number: 20220066178
    Abstract: A lens includes a first surface, a second surface opposed to the first surface, a first outer circumferential part disposed at an outer circumferential side of the first surface, a second outer circumferential part disposed at an outer circumferential side of the second surface, three or more first reference parts provided to the first outer circumferential part, three or more second reference parts provided to the second outer circumferential part, and a first reference surface disposed at an outer circumferential side of the first outer circumferential part and the second outer circumferential part. The first surface and the second surface have a common design axis. A first imaginary plane including the first reference parts and a second imaginary plane including the second reference parts are perpendicular to the design axis respectively. The first reference surface extends in parallel to the design axis.
    Type: Application
    Filed: August 31, 2021
    Publication date: March 3, 2022
    Inventors: Eiji MORIKUNI, Takuro FUSHIMI
  • Patent number: 11086112
    Abstract: A projection system is formed of a first optical system and a second optical system sequentially arranged from the demagnifying side toward the magnifying side and forms a first intermediate image and a second intermediate image in positions between a demagnifying-side image formation plane and a magnifying-side image formation plane of the projection system. The second optical system is a lens. The lens has a first transmissive surface, a reflective surface, and a second transmissive surface. The reflective surface has a concave shape, and the second transmissive surface has a convex shape protruding toward the magnifying side. An imaginary line specified in the lens inclines with respect to an imaginary vertical line perpendicular to the imaginary axis in a plane YZ, and the intermediate image is located between the first transmissive surface and the reflective surface.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: August 10, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Eiji Morikuni
  • Publication number: 20210232034
    Abstract: A projection system includes a first optical system and a second optical system including an optical element and disposed on the enlargement side of the first optical system. The optical element has a first transmissive surface, a first reflection surface disposed on the enlargement side of the first transmissive surface, a second reflection surface disposed on the enlargement side of the first reflection surface, and a second transmissive surface disposed on the enlargement side of the second reflection surface. The second reflection surface has a concave shape. A first optical axis of the first optical system and a second optical axis of the second reflection surface intersect each other.
    Type: Application
    Filed: January 22, 2021
    Publication date: July 29, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Eiji MORIKUNI
  • Publication number: 20210231932
    Abstract: A projection system includes a first and second optical system including an optical element and disposed at the enlargement side of the first optical system. The optical element has a first transmissive surface, a reflection surface, and a second transmissive surface. The second transmissive surface has a convex shape an aspheric shape. An effective light ray range of the second transmissive surface has a first end close to an optical axis of the reflection surface in a first axis direction along a first axis perpendicular to the optical axis and a second end far from the optical axis. A first radius of curvature at the first end is greater than a second radius of curvature at the second end, and a first center of curvature of the first radius of curvature is farther than a second center of curvature of the second radius of curvature from the first end.
    Type: Application
    Filed: January 22, 2021
    Publication date: July 29, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Eiji MORIKUNI
  • Publication number: 20210232036
    Abstract: A projection system includes a first optical system including a plurality of lenses and a deflector, and a second optical system including an optical element having a concave reflection surface and disposed at the enlargement side of the first optical system. The deflector is disposed in one air gap of a plurality of air gaps provided between the lenses adjacent to each other in the first optical system, the air gap having the largest axial inter-surface distance in the first optical system. The first optical system includes a first section located at the reduction side of the deflector and a second section located at the enlargement side of the deflector. A first optical axis section of the first section and a second optical axis section of the second section intersect each other. The second section includes three or more lenses. The second section is shorter than the first section.
    Type: Application
    Filed: January 22, 2021
    Publication date: July 29, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Eiji MORIKUNI
  • Patent number: 11073754
    Abstract: A projection optical system has a first optical system and a second optical system. The first and second optical systems are disposed in order from a demagnification side toward a magnification side. An intermediate image is formed between a demagnification-side imaging surface and a magnification-side imaging surface. The second optical system is an optical element having a first transmission surface, reflecting surface, and second transmission surface in order from the demagnification side toward the magnification side. The first transmission surface and reflecting surface are located at one side, and the second transmission surface is located at the other side with respect to the optical axis. The reflecting surface has a concavely curved surface shape. The second transmission surface has a convexly curved surface shape protruding toward the magnification side. The optical element has a first member and a second member different in refractive index.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: July 27, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Hirotaka Yanagisawa, Eiji Morikuni
  • Patent number: 11073753
    Abstract: A projection optical system has first and second optical systems disposed in order from a demagnification side toward a magnification side. An intermediate image is formed between demagnification-side and magnification-side imaging surfaces. The second optical system is an optical element having first transmission, reflecting, and second transmission surfaces in order from the demagnification toward the magnification sides. The first transmission and reflecting surfaces are located at one side with respect to an optical axis. The second transmission surface is located at the other side with respect to the optical axis. The reflecting surface has a concavely curved surface shape. The second transmission surface has a convexly curved surface shape protruding toward the magnification side. The optical element has a first member and a second member different in refractive index from the first member. A bonding surface between the first member and the second member has a curved surface shape.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: July 27, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Hirotaka Yanagisawa, Eiji Morikuni
  • Patent number: 11073749
    Abstract: A projection system has a first optical system and a second optical system arranged on a magnifying side of the first optical system. The projection system forms an intermediate image in a position between a demagnifying-side image formation plane and a magnifying-side image formation plane of the projection system. The second optical system is an optical element having a first transmissive surface, a reflective surface, and a second transmissive surface arranged from a demagnifying side toward the magnifying side. The first transmissive surface and the reflective surface are located at one side with respect to an optical axis. The second transmissive surface is located at another side with respect to the optical axis. The reflective surface has a concavely curved shape. The second transmissive surface has a convexly curved shape protruding toward the magnifying side.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: July 27, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Hirotaka Yanagisawa, Eiji Morikuni
  • Publication number: 20210223674
    Abstract: A projection system includes a first optical system and a second optical system including an optical element and disposed at the enlargement side of the first optical system. The first optical system includes a first lens and a second lens disposed at the reduction side of the first lens. The optical element has a first transmissive surface, a reflection surface disposed at the enlargement side of the first transmissive surface, and a second transmissive surface disposed at the enlargement side of the reflection surface. The first lens has aspheric surfaces at opposite sides. The second lens has aspheric surfaces at opposite sides. At least one of the first and second lenses is configured to move in an optical axis direction along a first optical axis of the first optical system.
    Type: Application
    Filed: January 19, 2021
    Publication date: July 22, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Eiji MORIKUNI, Kaho WATANABE
  • Patent number: 11042083
    Abstract: A projection system is formed of a first optical system and a second optical system sequentially arranged from the demagnifying side and forms an intermediate image in a position between a demagnifying-side image formation plane and a magnifying-side image formation plane of the projection system. The second optical system is a lens. The lens has a first transmissive surface, a reflective surface, and a second transmissive surface sequentially arranged from the demagnifying side toward the magnifying side. The reflective surface has a concave shape, and the second transmissive surface has a convex shape protruding toward the magnifying side. An imaginary line specified in the lens inclines with respect to an imaginary vertical line perpendicular to the imaginary axis in a plane YZ, and the intermediate image is located in the lens between the first transmissive surface and the reflective surface.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: June 22, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Eiji Morikuni
  • Publication number: 20200285140
    Abstract: An optical element has a first member having a first refractive index and a second member having a second refractive index different from the first refractive index. The optical element has a first transmissive surface, a reflective surface, and a second transmissive surface arranged from a demagnifying side toward a magnifying side in order. The first transmissive surface and the reflective surface are located in one side with respect to an optical axis of the optical element. The second transmissive surface is located in the other side with respect to the optical axis of the optical element. the reflective surface has a concave shape.
    Type: Application
    Filed: March 4, 2020
    Publication date: September 10, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Eiji MORIKUNI
  • Publication number: 20200278595
    Abstract: A projection system has a first optical system and a second optical system arranged on a magnifying side of the first optical system. The projection system forms an intermediate image in a position between a demagnifying-side image formation plane and a magnifying-side image formation plane of the projection system. The second optical system is an optical element having a first transmissive surface, a reflective surface, and a second transmissive surface arranged from a demagnifying side toward the magnifying side. The first transmissive surface and the reflective surface are located at one side with respect to an optical axis. The second transmissive surface is located at another side with respect to the optical axis. The reflective surface has a concavely curved shape. The second transmissive surface has a convexly curved shape protruding toward the magnifying side.
    Type: Application
    Filed: February 28, 2020
    Publication date: September 3, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hirotaka YANAGISAWA, Eiji MORIKUNI
  • Publication number: 20200278601
    Abstract: A projection optical system has a first optical system and a second optical system. The first and second optical systems are disposed in order from a demagnification side toward a magnification side. An intermediate image is formed between a demagnification-side imaging surface and a magnification-side imaging surface. The second optical system is an optical element having a first transmission surface, reflecting surface, and second transmission surface in order from the demagnification side toward the magnification side. The first transmission surface and reflecting surface are located at one side, and the second transmission surface is located at the other side with respect to the optical axis. The reflecting surface has a concavely curved surface shape. The second transmission surface has a convexly curved surface shape protruding toward the magnification side. The optical element has a first member and a second member different in refractive index.
    Type: Application
    Filed: February 28, 2020
    Publication date: September 3, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hirotaka YANAGISAWA, Eiji MORIKUNI
  • Publication number: 20200278600
    Abstract: A projection optical system has first and second optical systems disposed in order from a demagnification side toward a magnification side. An intermediate image is formed between demagnification-side and magnification-side imaging surfaces. The second optical system is an optical element having first transmission, reflecting, and second transmission surfaces in order from the demagnification toward the magnification sides. The first transmission and reflecting surfaces are located at one side with respect to an optical axis. The second transmission surface is located at the other side with respect to the optical axis. The reflecting surface has a concavely curved surface shape. The second transmission surface has a convexly curved surface shape protruding toward the magnification side. The optical element has a first member and a second member different in refractive index from the first member. A bonding surface between the first member and the second member has a curved surface shape.
    Type: Application
    Filed: February 28, 2020
    Publication date: September 3, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hirotaka YANAGISAWA, Eiji MORIKUNI
  • Publication number: 20200033715
    Abstract: A projection system is formed of a first optical system and a second optical system sequentially arranged from the demagnifying side and forms an intermediate image in a position between a demagnifying-side image formation plane and a magnifying-side image formation plane of the projection system. The second optical system is a lens. The lens has a first transmissive surface, a reflective surface, and a second transmissive surface sequentially arranged from the demagnifying side toward the magnifying side. The reflective surface has a concave shape, and the second transmissive surface has a convex shape protruding toward the magnifying side. An imaginary line specified in the lens inclines with respect to an imaginary vertical line perpendicular to the imaginary axis in a plane YZ, and the intermediate image is located in the lens between the first transmissive surface and the reflective surface.
    Type: Application
    Filed: July 26, 2019
    Publication date: January 30, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Eiji MORIKUNI