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    • 25. 发明授权
    • Focus state detection device and method
    • 聚焦状态检测装置及方法
    • US5652424A
    • 1997-07-29
    • US493391
    • 1995-06-21
    • Keiji Moriyama
    • Keiji Moriyama
    • G03B13/36G02B7/34G01J1/20
    • G02B7/346
    • A focus state detection device includes a field mask aperture having a shape created from the overlapping portions of two areas. The first area is formed by the outermost perimeter of the cross-section of light rays passing through the field mask plane toward each of the arrays of photoelectric conversion devices from each of point of the conjugal images of the arrays of photoelectric conversion devices at the primary imaging plane. The second area is formed by line segments that are the projection onto the field mask plane of the boundary lines at the surface of each re-imaging lens on the side toward the arrays of photoelectric conversion devices. The use of this shape causes light to be directed within the boundary lines of the outer perimeter of each of the re-imaging lenses. Through the use of this shape, the creation of stray light and internal reflection in the focus state detection optical system are suppressed, and stable focus state detection precision is enabled.
    • 焦点状态检测装置包括具有由两个区域的重叠部分形成的形状的场掩模孔。 第一区域由通过场掩模平面的光线的横截面的最外周边形成为从光电转换装置的阵列的每个点的每个点处的光电转换装置的主要 成像平面。 第二区域由在多个光电转换装置阵列侧的每个重新成像透镜的表面处的边界线的场屏蔽平面上的投影线形成。 使用这种形状使得光线被引导到每个重新成像透镜的外周边界线内。 通过使用该形状,抑制焦点状态检测光学系统中的杂散光和内部反射的产生,能够实现稳定的聚焦状态检测精度。
    • 26. 发明授权
    • Zoom lens equipped with the image stabilizing function
    • 变焦镜头配有图像稳定功能
    • US5579171A
    • 1996-11-26
    • US563908
    • 1995-11-22
    • Kenzaburo SuzukiMasahiro NakatsujiKeiji Moriyama
    • Kenzaburo SuzukiMasahiro NakatsujiKeiji Moriyama
    • G02B15/173G02B27/64
    • G02B27/646G02B15/173
    • A zoom lens having a four-unit lens construction with positive, negative, positive, and positive refractive powers. In an embodiment, the second lens unit is moved toward the image side during the magnification change from the wide angle end to the telephoto end, and the third lens unit is moved in a direction substantially orthogonal to the optical axis to effect image stabilization. The zoom lens satisfies the condition that .DELTA.Y=f.sub.4 /f.sub.3 .multidot..DELTA.S. In another embodiment, the first, third, and fourth lens units are moved toward the object side during the magnification change from the wide angle end to the telephoto end, and the second lens unit is moved in a direction substantially orthogonal to the optical axis to effect image stabilization. The zoom lens satisfies the condition that .DELTA.Y=(1-.beta..sub.2).multidot..beta..sub.34 .multidot..DELTA.S.
    • 具有正,负,正和正屈光力的四单位透镜结构的变焦透镜。 在一个实施例中,在从广角端到远摄端的放大变化期间,第二透镜单元朝向图像侧移动,并且第三透镜单元在基本上垂直于光轴的方向上移动以实现图像稳定。 变焦透镜满足DELTA Y = f4 / f3x DELTA S的条件。在另一个实施例中,在从广角端到望远端的放大倍数变化期间,第一,第三和第四透镜单元向物体侧移动, 第二透镜单元在与光轴基本正交的方向上移动以实现图像稳定。 变焦镜头满足以下条件:DELTA Y =(1-β2)×β34×DELTA S.