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    • 3. 发明授权
    • Zoom lens and image projection apparatus
    • 变焦镜头和图像投影设备
    • US07826147B2
    • 2010-11-02
    • US12563700
    • 2009-09-21
    • Junya IchimuraKazuhiro InokoSaburo Sugawara
    • Junya IchimuraKazuhiro InokoSaburo Sugawara
    • G02B15/14
    • G02B15/177
    • A zoom lens includes a negative lens unit having a negative refractive power, at least one positive lens unit having a positive refractive power, an intermediate lens unit including a stop, and at least one reduction side lens unit, in order from a magnification conjugate side to a reduction conjugate side, at least two magnification side movable lens units in the negative lens unit and the at least one positive lens unit, and at least one reduction side movable lens unit in the at least one reduction side lens unit are moved during zooming, and conditions of 0.9
    • 变焦透镜包括具有负折光力的负透镜单元,具有正屈光力的至少一个正透镜单元,包括止挡件的中间透镜单元和至少一个缩小侧透镜单元,从放大率共轭侧 到缩小共轭侧,在负透镜单元和至少一个正透镜单元中的至少两个放大倍率可移动透镜单元以及至少一个缩小侧透镜单元中的至少一个缩小侧可移动透镜单元在变焦期间移动 ,和条件0.9 <(XT·&bgr; Tb·&phgr; W)/(XW·&bgr; Wb·&phgr; T)<1.1,0.9 <&phgr; W /&phgr; T <1.1,0.8 <(&bgr; TS ·&bgr; Tb)/(&bgr; WS·&bgr; Wb)<1.2,满足1.4
    • 4. 发明申请
    • ZOOM LENS AND IMAGE PROJECTION APPARATUS
    • 变焦镜头和图像投影设备
    • US20100073775A1
    • 2010-03-25
    • US12563700
    • 2009-09-21
    • Junya IchimuraKazuhiro InokoSaburo Sugawara
    • Junya IchimuraKazuhiro InokoSaburo Sugawara
    • G02B15/14
    • G02B15/177
    • A zoom lens includes a negative lens unit having a negative refractive power, at least one positive lens unit having a positive refractive power, an intermediate lens unit including a stop, and at least one reduction side lens unit, in order from a magnification conjugate side to a reduction conjugate side, at least two magnification side movable lens units in the negative lens unit and the at least one positive lens unit, and at least one reduction side movable lens unit in the at least one reduction side lens unit are moved during zooming, and conditions of 0.9
    • 变焦透镜包括具有负折光力的负透镜单元,具有正屈光力的至少一个正透镜单元,包括止挡件的中间透镜单元和至少一个缩小侧透镜单元,从放大率共轭侧 到缩小共轭侧,在负透镜单元和至少一个正透镜单元中的至少两个放大倍率可移动透镜单元以及至少一个缩小侧透镜单元中的至少一个缩小侧可移动透镜单元在变焦期间移动 ,和条件0.9 <(XT·&bgr; Tb·&phgr; W)/(XW·&bgr; Wb·&phgr; T)<1.1,0.9 <&phgr; W /&phgr; T <1.1,0.8 <(&bgr; TS ·&bgr; Tb)/(&bgr; WS·&bgr; Wb)<1.2,满足1.4
    • 6. 发明授权
    • Projection lens
    • 投影镜头
    • US6084719A
    • 2000-07-04
    • US140176
    • 1998-08-25
    • Saburo SugawaraKen Wada
    • Saburo SugawaraKen Wada
    • G02B13/16G02B13/22G02B3/00
    • G02B13/16G02B13/22
    • A projection optical system includes, in order from a first conjugate point side of longer distance to a second conjugate point side of shorter distance, a first lens unit in which negative lenses included therein are larger in number than positive lenses included therein, and a second lens unit in which positive lenses included therein are larger in number than negative lenses included therein, wherein design parameters are determined such that an off-axial principal ray intersects an optical axis at a point between the first lens unit and the second lens unit and telecentricity is made on the second conjugate point side, and wherein the second lens unit includes, in order from the second conjugate point side, a negative lens of meniscus form convex toward the second conjugate point side and a positive lens whose both surfaces are convex.
    • 投影光学系统从长距离的第一共轭点侧到短距离的第二共轭点侧依次包括第一透镜单元,其中包括的负透镜的数量比包括在其中的正透镜的数量大,第二透镜单元 其中包括在其中的正透镜的数量大于其中包括的负透镜的透镜单元,其中确定设计参数,使得偏轴主光线在第一透镜单元和第二透镜单元之间的点处与光轴相交,并且具有远心 在第二共轭点侧制成,并且其中第二透镜单元从第二共轭点侧依次包括朝向第二共轭点侧凸出的弯月面的负透镜和其两个表面都是凸的正透镜。
    • 9. 发明授权
    • Zoom lens for projecting video image
    • 用于投影视频图像的变焦镜头
    • US5600490A
    • 1997-02-04
    • US317523
    • 1994-10-04
    • Saburo SugawaraHiroyuki Hamano
    • Saburo SugawaraHiroyuki Hamano
    • G02B15/173G02B15/14
    • G02B15/173
    • A zoom lens comprising, in order from the large conjugate side, a first lens unit of positive refractive power, a second lens unit of negative refractive power and a third lens unit of positive refractive power, wherein when zooming from the shortest focal length to the longest focal length end, the air separations between the first and second lens units and between the second and third lens units increases and decreases monotonously, respectively, the first to third lens units each has at least one aspheric surface, and the following condition is satisfied:.vertline.D.sub.12d /D.sub.23d .vertline.
    • 一种变焦透镜,包括从大共轭侧开始的顺序为正屈光力的第一透镜单元,负折射光焦度的第二透镜单元和正折射光焦度的第三透镜单元,其中当从最短焦距变焦到 最长的焦距端,第一和第二透镜单元之间以及第二和第三透镜单元之间的空气分离分别增加和减少,第一至第三透镜单元各自具有至少一个非球面,并且满足以下条件 :| D12d / D23d | <0.25其中D12d是第一和第二透镜单元与变焦之间的间隔的变化量,D23d是具有变焦的第二和第三透镜单元之间的间隔的变化量。