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    • 3. 发明授权
    • Wide angle lens and imaging device
    • 广角镜头和成像装置
    • US08643958B2
    • 2014-02-04
    • US13257446
    • 2010-03-24
    • Issei AbeHayato YoshidaNaoki Moniwa
    • Issei AbeHayato YoshidaNaoki Moniwa
    • G02B9/64G02B13/18
    • G02B13/06
    • A wide angle lens whose field angle exceeds 160 degrees, includes a front group, an aperture stop, and a rear group arranged in this order from an object-side toward an image-side. The front group includes a first lens (negative meniscus) whose convex surface faces the object, a second lens (negative), a third lens (negative), and a fourth lens (positive), arranged in this order from the object-side toward the image-side. The rear group includes a fifth lens (positive), a sixth lens (negative), and a seventh lens (positive), arranged in this order from an aperture-side toward the image-side. The fifth and sixth lenses are combined, forming a cemented lens having positive refractive power. The fifth and sixth lenses are made of materials having Abbe numbers of greater than or equal to 50 and less than or equal to 30, respectively. A surface of the seventh lens facing the image is aspheric.
    • 场角超过160度的广角镜头包括从物体侧朝向图像侧依次排列的前组,孔径光阑和后组。 前组包括凸面朝向物体的第一透镜(负弯月面),第二透镜(负像),第三透镜​​(负像)和第四透镜(正),从物侧朝向 图像侧。 后组包括从孔径侧向图像侧依次排列的第五透镜(正),第六透镜(负像)和第七透镜(正)。 组合第五和第六透镜,形成具有正折光力的胶合透镜。 第五和第六透镜分别由阿贝数大于等于50且小于等于30的材料制成。 面对图像的第七透镜的表面是非球面的。
    • 6. 发明申请
    • PROJECTION OPTICAL SYSTEM AND IMAGE PROJECTOR
    • 投影光学系统和图像投影仪
    • US20120092628A1
    • 2012-04-19
    • US13236749
    • 2011-09-20
    • Tatsuya TAKAHASHIKazuhiro FujitaIssei Abe
    • Tatsuya TAKAHASHIKazuhiro FujitaIssei Abe
    • G03B21/14
    • G03B21/14G03B21/28H04N9/3102
    • A projection optical system configured to project an image onto a projection surface includes a first optical system including at least one dioptric system and having positive power as a whole; a second optical system including a reflection region and a transmission region; and a third optical system including at least one reflecting surface having power, and having positive power as a whole, wherein light entering the projection optical system passes through the first optical system to have a path thereof bent by the reflection region of the second optical system to be incident on the third optical system, and the light incident on the third optical system has the path thereof bent by the third optical system to pass through the transmission region of the second optical system to be incident on the projection surface.
    • 配置为将图像投影到投影表面上的投影光学系统包括:第一光学系统,包括至少一个折射系统,并且整体具有正的光焦度; 包括反射区域和透射区域的第二光学系统; 以及第三光学系统,包括具有动力的至少一个反射面,并且整体具有正的光焦度,其中进入所述投影光学系统的光通过所述第一光学系统以具有由所述第二光学系统的反射区域弯曲的路径 入射在第三光学系统上,并且入射到第三光学系统上的光具有由第三光学系统弯曲的路径,以通过第二光学系统的透射区域以入射在投影表面上。
    • 9. 发明授权
    • Projection optical system and image projection device
    • 投影光学系统和图像投影设备
    • US08905550B2
    • 2014-12-09
    • US13643177
    • 2011-05-09
    • Tatsuya TakahashiKazuhiro FujitaIssei Abe
    • Tatsuya TakahashiKazuhiro FujitaIssei Abe
    • G03B21/28G02B17/08G03B21/14
    • G02B17/08G02B17/0852G03B21/14G03B21/28
    • A disclosed projection optical system projects images on a surface to be projected on. The projection optical system includes a first optical system including at least one refraction optical system and having positive power as a whole, a folding mirror, and a second optical system including at least one reflection surface having power and having positive power as a whole. Further the folding mirror folds a light path from the first optical system to the second optical system, and in a plane including an optical axis of the first optical system and a normal line of the surface to be projected on, the following conditional expressions (1) through (3) are satisfied (1) 0.43≦d1, (2) 0.43≦d2, and (3) 0.7≦d2/d1≦2.0.
    • 所公开的投影光学系统在要投影的表面上投影图像。 投影光学系统包括具有至少一个折射光学系统并具有整体正电力的第一光学系统,折叠镜和包括至少一个反射面的第二光学系统,该反射面整​​体上具有正的光焦度。 此外,折叠镜折叠从第一光学系统到第二光学系统的光路,并且在包括第一光学系统的光轴和要投影的表面的法线的平面中,以下条件表达式(1 (3)满足(1)0.43≦̸ d1,(2)0.43≦̸ d2和(3)0.7≦̸ d2 / d1≦̸ 2.0。