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公开(公告)号：US20210157139A1
公开(公告)日：2021-05-27
申请号：US17167545
申请日：2021-02-04
Inventor： Tsutomu IWASHITA , Tomoaki MIYAMOTO
Abstract: Head-up display includes: display element for displaying an image, and a projection optical system for projecting the image, which is displayed on display element, onto viewing region of viewer. The projection optical system includes combiner that is disposed at a position in an optical path from display element to viewing region of viewer. Combiner has a surface at which light incident from display element enters; the surface has a curved surface shape. Combiner has an effective region corresponding to viewing region of viewer. In the effective region, combiner has a horizontal cross-sectional shape that changes in thickness along from the center toward an end.
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2.发明申请公开(公告)号：US20180326909A1
公开(公告)日：2018-11-15
申请号：US16043075
申请日：2018-07-23
Inventor： Tsutomu IWASHITA
CPC classification number: B60R1/02 , B60R1/00 , G02B13/006 , G02B13/009 , G02B13/18 , G02B15/15 , G02B15/22
Abstract: A zoom lens system includes, in order from the object side to the image side, a first lens group having negative power and a second lens group having positive power. The first lens group includes at least two negative lenses. When zooming, one of the first lens group and the second lens group is fixed relative to the imaging surface, and the other moves along an optical axis to change an angle of view.
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公开(公告)号：US20150124127A1
公开(公告)日：2015-05-07
申请号：US14595586
申请日：2015-01-13
Inventor： Tsutomu IWASHITA , Yoshiaki KURIOKA , Takehiro NISHIOKA
CPC classification number: G02B13/009 , G02B15/14 , G02B15/16 , G02B15/173 , H04N5/23296
Abstract: A zoom lens system comprising a plurality of lens units each being composed of at least one lens element, and comprising, in order from an object side to an image side, a first lens unit having positive optical power, a second lens unit having negative optical power, a third lens unit having positive optical power, a fourth lens unit having positive optical power, and a fifth lens unit having negative optical power, wherein the first lens unit is composed of two or less lens elements, the third lens unit is composed of five or more lens elements, and the condition: 5.0
Abstract translation: 一种变焦透镜系统，包括多个透镜单元，每个透镜单元由至少一个透镜元件组成，并且从物体侧到图像侧依次包括具有正光焦度的第一透镜单元，具有负光学的第二透镜单元 电源，具有正光焦度的第三透镜单元，具有正光焦度的第四透镜单元和具有负光焦度的第五透镜单元，其中第一透镜单元由两个或更少的透镜元件组成，第三透镜单元组成 五个或更多个透镜元件，并且满足条件：5.0
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公开(公告)号：US20160195691A1
公开(公告)日：2016-07-07
申请号：US15070507
申请日：2016-03-15
Inventor： Takakazu BITO , Shunichiro YOSHINAGA , Hideki KAI , Tsutomu IWASHITA , Yoshiaki KURIOKA , Aya TOMITA , Hisayuki II
CPC classification number: G02B9/34 , G02B3/04 , G02B5/005 , G02B9/04 , G02B13/002 , G02B13/0045 , G02B13/0065 , G02B13/04 , G02B13/18 , G02B13/24 , G02B15/14 , G02B15/177 , G02B27/0025
Abstract: An imaging optical system, in order from an object side to an image side, includes: a first lens unit having positive optical power; and a second lens unit. In focusing from an infinity in-focus condition to a close-object in-focus condition, the first lens unit moves along an optical axis, and the second lens unit is fixed with respect to an image surface. The imaging optical system is compact, sufficiently suppresses occurrence of various aberrations, has high resolution from the infinity in-focus condition to the close-object in-focus condition, is bright and highly efficient, and is suitable for wide-angle photographing.
Abstract translation: 成像光学系统从物体侧到像侧依次包括：具有正光焦度的第一透镜单元; 和第二透镜单元。 在从无限远对焦状态到近距离对焦状态的对焦中，第一透镜单元沿着光轴移动，并且第二透镜单元相对于图像面固定。 成像光学系统紧凑，足以抑制各种像差的发生，从无限远对焦状态到近距离对焦状态具有高分辨率，是高亮度且高效的，适用于广角拍摄。
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