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公开(公告)号：US11137599B2
公开(公告)日：2021-10-05
申请号：US16437981
申请日：2019-06-11
Inventor： Hiroaki Okayama , Satoshi Kuzuhara , Masahito Ogata , Toshiya Mori , Ken'ichi Kasazumi , Masafumi Sueyoshi
IPC: G03B21/56 , G02B27/01 , H04N5/74 , H04N13/30 , H04N5/64 , B60R11/02 , G02B30/00 , G03B21/28 , B60K35/00 , G02B26/10
Abstract: In a display device, an irradiation unit includes an imaging optical system. The imaging optical system scans and irradiates a front surface of a screen with light to form an image. The light passing through the screen and output from the screen in a movement direction is incident on a projection unit as incident light. The projection unit irradiates a reflective member with the incident light to allow the reflective member to reflect the incident light to form a virtual image corresponding to the image in a target space. A locus of a focal position of the imaging optical system when the irradiation unit wholly scans the front surface of the screen is within a range between the front surface of the screen at a first position and the front surface of the screen at a second position.
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公开(公告)号：US11899190B2
公开(公告)日：2024-02-13
申请号：US17243984
申请日：2021-04-29
Inventor： Takahiro Kitada , Yuka Kudo , Masafumi Sueyoshi , Jindong Li
CPC classification number: G02B15/145121 , G02B13/02 , G02B13/18
Abstract: A zoom lens system includes: a first lens group having positive power; a second lens group having negative power; a third lens group having positive power; a fourth lens group having negative power; and a fifth lens group having positive power. The first lens group is made up of a single lens. The second lens group is made up of four lenses. The zoom lens system is configured to zoom from a wide-angle end toward a telephoto end such that the fifth lens group does not move but the first to fourth lens groups move to change intervals between the lens groups.
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公开(公告)号：US10281722B2
公开(公告)日：2019-05-07
申请号：US15728543
申请日：2017-10-10
Inventor： Satoshi Kuzuhara , Masafumi Sueyoshi , Hiroaki Okayama , Katsuhiko Hayashi
Abstract: A head-up display projects an image on a windshield to allow a viewer to visually observe a virtual image. The head-up display includes a display device, a relay optical system, and a projection optical system. The display device displays an image. The relay optical system provides the image displayed by the display device as an intermediate image. The projection optical system reflects the intermediate image provided by the relay optical system to project the intermediate image on the windshield.
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公开(公告)号：US10079964B2
公开(公告)日：2018-09-18
申请号：US14972150
申请日：2015-12-17
Inventor： Yoshio Matsumura , Masafumi Sueyoshi , Yusuke Nihei
CPC classification number: H04N5/2254 , G02B13/18 , G02B15/17
Abstract: A lens system, an interchangeable lens apparatus, and a camera system each include a front group including a first focus lens group that moves with respect to an image surface in focusing from an infinity in-focus condition to a close-object in-focus condition; a rear group including a second focus lens group that moves with respect to the image surface in focusing, the front group and the rear group being located in order from an object side to an image side; a fixed lens group including at least one positive power lens element, the fixed lens group being located between the front group and the rear group and fixed with respect to the image surface in focusing; and an aperture diaphragm. The positive power lens in the fixed lens group satisfies dPgF>0.015 (dPgF is an anomalous dispersibility in a g-line and an F-line of the lens element).
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