-
公开(公告)号：US10705419B2
公开(公告)日：2020-07-07
申请号：US16419592
申请日：2019-05-22
Inventor： Norikazu Yamamoto
Abstract: A first prism has first to third faces. The first face is opposing a first optical modulator. Any two planes among three planes respectively including the first to third faces intersect with each other. A second prism has fourth to sixth faces. The fourth face is provided to be in contact with the third face via a dichroic coating layer and in parallel with the third face. The fifth face is opposing a second optical modulator and in parallel with the second face. The sixth face is in opposite to the first optical modulator with respect to an optical axis of the second optical modulator. The sixth face is formed to be inclined with respect to a reference surface, such that an unnecessary transmitted light and an unnecessary reflected light of the dichroic coating layer are not totally reflected by the sixth face.
-
公开(公告)号：US10353282B2
公开(公告)日：2019-07-16
申请号：US16013979
申请日：2018-06-21
Inventor： Norikazu Yamamoto
Abstract: The projection display apparatus includes a light source unit, a light deflector, a first light receiver, a second light receiver, and a calculator. The light deflector deflects at least part of incident light coming from the light source unit to a first optical path so as to produce a projection light, and deflects a remaining part of the incident light to a second optical path. The first light receiver receives the at least part of the incident light that has been reflected by the projection surface. The second light receiver receives the remaining part of the incident light. The calculator calculates a distance from the projection display apparatus to a projection surface based on light reception results obtained by the first light receiver receiving the at least part of the incident light and the second light receiver receiving the remaining part of the incident light.
-
公开(公告)号：US11099468B2
公开(公告)日：2021-08-24
申请号：US16552526
申请日：2019-08-27
Inventor： Norikazu Yamamoto
Abstract: A light source device includes: a light source configured to emit laser light; an optical system having an optical axis for guiding the laser light; a first prism which is disposed between the light source and the optical system and includes a first incident surface on which the laser light is incident, and a first exit surface inclined with respect to the first incident surface; a second prism which is disposed between the first prism and the optical system and includes a second incident surface facing the first exit surface at an interval, and a second exit surface inclined with respect to the second incident surface; and a driver configured to rotate the first and second prisms around the optical axis in a state in which the first exit surface and the second incident surface are inclined with respect to the optical axis.
-
公开(公告)号：US10313658B2
公开(公告)日：2019-06-04
申请号：US15488564
申请日：2017-04-17
Inventor： Shigenori Yatsuri , Norikazu Yamamoto , Mitsuru Kashihara , Yuichi Suzuki , Ken Ishida
IPC: H04N7/00 , H04N13/246 , B60R1/00 , G06T7/73 , G01B7/00 , G01C3/08 , G07C5/00 , G06T7/593 , H04N13/271 , H04N13/239 , H04N13/128 , H04N13/296 , H04N13/00
Abstract: A vehicle-mounted stereo camera device that achieves high-precision distance detection is provided. The provided vehicle-mounted stereo camera device includes a left camera and right camera disposed on a vehicle via a holder to cause visual fields to overlap each other, a stereo processor that calculates a distance to a body outside the vehicle based on images captured by the left camera and right camera and on positions on the vehicle, first and second geomagnetic sensors respectively disposed near the left camera and right camera, and a third geomagnetic sensor disposed on the holder. The stereo processor compares a geomagnetic value detected by the first or second geomagnetic sensor with a geomagnetic value detected by the third geomagnetic sensor, detects a displacement amount of the left camera or right camera, and changes a cutout position in the image captured by the left camera or right camera based on the displacement amount.
-
公开(公告)号：US12001131B2
公开(公告)日：2024-06-04
申请号：US17841077
申请日：2022-06-15
Inventor： Norikazu Yamamoto
CPC classification number: G03B21/2066 , G02B27/141 , G03B33/04
Abstract: A projection image display device of the present disclosure includes a light source, an image forming element that forms an image, a color separating and combining unit that separates first illumination light and second illumination light, and combines first projection light and second projection light reflected by the image forming element, and a notch filter that is disposed between the light source and the color separating and combining unit. A first dichroic filter reflects the first illumination light and the first projection light. A first incident angle of the first illumination light with respect to the first dichroic filter is different from a second incident angle of the first projection light with respect to the first dichroic filter. The notch filter attenuates light in a first wavelength band including a boundary between a wavelength band of the first illumination light and a wavelength band of the second illumination light.
-
Patent Agency Ranking
公开(公告)号：US11914278B2
公开(公告)日：2024-02-27
申请号：US17734530
申请日：2022-05-02
Inventor： Norikazu Yamamoto
CPC classification number: G03B33/12 , G03B21/008 , G03B21/204
Abstract: A prism block includes a first prism having first, second and third surfaces, a second prism having a fourth surface parallel to the first surface, a fifth surface facing the second surface, and a sixth surface, a third prism having seventh and eight surfaces respectively facing the second and fifth surfaces, and an optical path separation coating disposed between the fifth and eighth surfaces. Illumination light incident on the third surface is reflected by the second surface, and is emitted from the first surface. Projection light incident on the first surface is emitted from the fourth surface. Imaging light incident on the fourth surface is reflected by the optical path separation coating, and is emitted from the sixth surface. A projection axis plane including optical paths of the illumination light and the projection light, and an imaging axis plane including an optical path of the imaging light intersect each other.
-
公开(公告)号：US10652477B2
公开(公告)日：2020-05-12
申请号：US16128448
申请日：2018-09-11
Inventor： Norikazu Yamamoto
Abstract: A night vision imaging apparatus includes a light projecting section, a light amount controller, an imaging section, and a recording section. The light projecting section casts a near infrared ray as illumination light on an illumination area. The light amount controller controls an amount of the illumination light on each one of sub-areas forming the illumination area. The imaging section images the illumination area, and generates image data. The recording section records the image data generated by the imaging section. The light amount controller divides an image shown in the image data into a plurality of divided portions, and determines a light intensity of each one of the plurality of divided portion, and then controls an amount of the illumination light to be casted on a sub-area corresponding to each one of the plurality of divided portions among the sub-areas of the illumination area based on the determined light intensity.
-
公开(公告)号：US12003897B2
公开(公告)日：2024-06-04
申请号：US17733188
申请日：2022-04-29
Inventor： Norikazu Yamamoto
CPC classification number: H04N9/317 , G02B13/16 , G02B19/0047 , G02B27/286
Abstract: A projection display apparatus includes an image light emitter that includes a light modulation element that emits image light, a projection lens unit that projects the image light on a projection target, an optical path separation element, an imaging element that images external light incident via the projection lens unit and the optical path separation element, and a condensing optical system. The optical path separation element transmits a part of the image light to the projection lens unit, and reflects a part of the external light emitted from the projection lens unit to the condensing optical system. The condensing optical system condenses the part of the external light reflected by the optical path separation element on the imaging element. A capturing angle of the external light in the condensing optical system is equal to or less than a condensing angle of a lens F-number of the projection lens unit.
-
公开(公告)号：US12271103B2
公开(公告)日：2025-04-08
申请号：US17733152
申请日：2022-04-29
Inventor： Norikazu Yamamoto
Abstract: A projection display apparatus includes a projection lens unit that projects image light and on which external light including the image light reflected by a projection target is incident, an optical path separation prism, a narrowband retarder plate and an imaging element. The optical path separation prism includes the first prism having first and second surfaces, the second prism having a third surface disposed on a side of projection lens unit, a fourth surface facing the second surface and a fifth surface, and the polarization separation coating being disposed between the second surface and the fourth surface. The narrowband retarder plate aligns the image light into a first polarization state. Light in a second polarization state in the external light is reflected by the polarization separation coating, is totally internally reflected by the third surface, is emitted from the fifth surface, and is received by the imaging element.
-
公开(公告)号：US20250036016A1
公开(公告)日：2025-01-30
申请号：US18752165
申请日：2024-06-24
Inventor： Norikazu Yamamoto
IPC: G03B21/20
Abstract: A projection optical system includes a plurality of lenses. The projection optical system projects projection light, to display an image formed on the video display element onto a projection target. The projection light having reflected on lens surfaces of the plurality of lenses form a ray passing through the projection optical system. Each lens surface, among the lens surfaces in the projection optical system, satisfies |X|>f/2. Where, in ray tracing using paraxial ray tracing with a marginal ray of an axial light flux passing through the projection optical system, when a first ray is a reflection of the marginal ray propagated backwards on the display surface, X denotes a distance between the display surface and a convergence plane where a reflection of the first ray on the lens surface converges, and f denotes a focal length of an entire system of the projection optical system.
-
-
-
-
-
-
-
-
-
Search Results
15
records
(took 0.016 seconds)
