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公开(公告)号：US20180338095A1
公开(公告)日：2018-11-22
申请号：US15971370
申请日：2018-05-04
Inventor： Masayuki AIHARA , Yoshio MATSUMURA , Shigenori YATSURI , Hiroyuki SHOBAYASHI
CPC classification number: H04N5/2258 , G06K9/00791 , G06K9/209 , G06K2009/2045 , H04N5/2254 , H04N5/23232 , H04N5/3696
Abstract: An imaging system includes first imaging device (10a) and second imaging device (10b). First imaging device (10a) includes a first optical system having a first view angle, and a first imaging element. Second imaging device (10b) includes a second optical system having a second view angle that is wider than the first view angle, and a second imaging element. The second optical system is configured to form an image including a first region and a second region, which do not overlap each other, such that a resolution in the second region is higher than a resolution in the first region corresponding to an imaging range of the first view angle, in an imaging surface of a subject image.
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公开(公告)号：US20220221694A1
公开(公告)日：2022-07-14
申请号：US17705745
申请日：2022-03-28
Inventor： Hiroyuki SHOBAYASHI , Yoshio MATSUMURA , Takuya IMAOKA , Tomoko IIYAMA
Abstract: A lens system includes a plurality of lens elements arranged from an object side to an image plane side, and a diaphragm arranged between the plurality of lens elements. The plurality of lens elements include a plurality of freeform lenses each having a freeform surface that is asymmetrical with respect to a first direction and a second direction which cross with each other. At least one freeform lens is placed on the image plane side of the diaphragm. With a lens thickness T1 in the first direction at a maximum height of an axial ray and a lens thickness T2 in the second direction at the maximum height of the axial ray, at least one freeform lens satisfying 0.3
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公开(公告)号：US20210132321A1
公开(公告)日：2021-05-06
申请号：US17146803
申请日：2021-01-12
Inventor： Hiroyuki SHOBAYASHI
Abstract: A lens system for forming an image of light incident from an object side on an imaging element arranged on an image surface side includes: a plurality of lens elements including free-curved surface lenses; and a diaphragm arranged between the plurality of lens elements. The lens elements form a front group arranged on the object side of the diaphragm, and a rear group arranged on the image surface side of the diaphragm. A first lens element closest to the object side in the plurality of lens elements has an aspherical surface that is rotationally symmetrical. The free-curved surface lenses each has a free-curved surface that is asymmetrical with respect to a first direction and a second direction crossing with each other. A free-curved surface lens satisfying a conditional expression “D×(SV−SH)/IH>0.08” is arranged on the rear group in the plurality of lens elements.
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公开(公告)号：US20240160015A1
公开(公告)日：2024-05-16
申请号：US18422745
申请日：2024-01-25
Inventor： Kazuhiro MINAMI , Hiroyuki SHOBAYASHI , Satoshi KUZUHARA
CPC classification number: G02B27/0103 , G02B6/34 , G02B2027/0125
Abstract: A light flux incident on the light guide body is replicated in a first direction or a second direction by a diffraction structure of an expansion region. When a normal direction with respect to the light guide body of the expansion region is defined as a Z-axis direction, and a tangential plane is defined as an XY plane, the diffraction structure of the expansion region is configured such that a light flux duplicated when the light flux incident on the expansion region is transmitted through the XY plane of the expansion region from a positive direction of the Z axis and a light flux duplicated when the light flux is transmitted through the XY plane of the expansion region from a negative direction of the Z axis are accommodated within a viewing angle at which the image is visually recognizable.
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Patent Agency Ranking
公开(公告)号：US20220214528A1
公开(公告)日：2022-07-07
申请号：US17703192
申请日：2022-03-24
Inventor： Yoshio MATSUMURA , Hiroyuki SHOBAYASHI , Takuya IMAOKA , Tomoko IIYAMA
Abstract: A lens system includes lens elements and a diaphragm. The lens elements include freeform lenses each having a freeform surface asymmetrical with respect to first and second directions. At least one freeform lens is placed on the image plane side of the diaphragm. The lens system satisfies a following conditional expression (1); 0.0075
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公开(公告)号：US20250020917A1
公开(公告)日：2025-01-16
申请号：US18899205
申请日：2024-09-27
Inventor： Hiroyuki SHOBAYASHI , Satoshi Kuzuhara , Kazuhiro Minami , Hiroaki Okayama , Akira Hashiya
Abstract: An optical system includes an incidence part changing a traveling direction of the incident image light from a display part and an expansion part that divides and duplicates the image light traveling from the incidence part. The expansion part includes a first and a second expansion part. The first expansion part includes a first and a second diffraction structure part each having a diffraction structure that divides and duplicates the image light along a first direction, and a non-diffraction structure part disposed between the first and the second diffraction structure part. The second expansion part includes a third diffraction structure part that divides and duplicates image light along the first direction. The third diffraction structure part is disposed to overlap with the non-diffraction structure part of the first expansion part in a vertical direction with respect to the pupil expansion part.
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公开(公告)号：US20240160016A1
公开(公告)日：2024-05-16
申请号：US18423722
申请日：2024-01-26
Inventor： Kazuhiro Minami , Satoshi KUZUHARA , Hiroyuki SHOBAYASHI
CPC classification number: G02B27/0103 , G02B6/34 , G02B2027/0125
Abstract: An optical system includes a display that emits a light flux visually recognized by an observer as an image, and a light guide body that replicates the light flux. The light flux is emitted from the emission surface after being expanded by being replicated in a first direction corresponding to a horizontal direction of the image visually recognized by the observer due to diffraction by a diffraction structure of an expansion region in the light guide body, a second direction corresponding to a vertical direction of the image, or both the directions. A coherence length of the light flux diffracted and emitted in the expansion region in the light guide body is smaller than twice a shorter interval between the diffraction structure and each of a front surface and a back surface of the light guide body.
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公开(公告)号：US20210096346A1
公开(公告)日：2021-04-01
申请号：US17117658
申请日：2020-12-10
Inventor： Yoshio MATSUMURA , Hiroyuki SHOBAYASHI
Abstract: An imaging optical system is an optical system having an image circle formed on an imaging element. The imaging optical system includes: a plurality of lens elements arranged from an object side to an image plane side, and a diaphragm arranged between the plurality of lens elements. The plurality of lens elements includes a freeform lens having a freeform surface that is asymmetrical between a first direction and a second direction which cross with each other. At least two freeform lenses are located on the object side of the diaphragm.
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公开(公告)号：US20210011263A1
公开(公告)日：2021-01-14
申请号：US17029608
申请日：2020-09-23
Inventor： Yoshio MATSUMURA , Hiroyuki SHOBAYASHI
Abstract: A lens system that forms an image on an imaging element, includes: first to third lens element arranged in order; a diaphragm; and a lens element on the image surface side. At least one of the first and second lens elements has a free-curved surface, and one of the first and second lens elements has free-curved surfaces on both sides. The third lens element has free-curved surfaces on both sides. The first lens element has a convex shape, toward the object side, of a surface facing the object side. The second lens element has a convex shape, toward the object side, of a surface facing the image surface side. The third lens element has a convex shape, toward the image surface side, of a surface facing the object side. The lens element on the image surface side has, at least on the object side, a free-curved surface.
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