Video camera with an automatic focusing system
    1.
    发明授权
    Video camera with an automatic focusing system 失效
    具有自动对焦系统的摄像机

    公开(公告)号:US4924317A

    公开(公告)日:1990-05-08

    申请号:US254683

    申请日:1988-10-07

    IPC分类号: H04N5/232

    CPC分类号: H04N5/23212

    摘要: A video camera has an automatic focusing system provided with a focus detecting section for calculating and outputting a focus signal corresponding to a focus condition of an picked-up image from a video signal produced by an image pickup element. Either the image pickup element or a focusing lens in a photographic lens is oscillated back and forth of its present position, as needed, to detect an in-focus direction at the moment. The focusing lens is moved in the in-focus direction up to a position at which an optimum focus condition is obtained.

    Zoom lens driving apparatus
    2.
    发明授权
    Zoom lens driving apparatus 失效
    变焦镜头驱动装置

    公开(公告)号:US4991944A

    公开(公告)日:1991-02-12

    申请号:US290195

    申请日:1988-12-27

    IPC分类号: G02B7/10 H04N5/232

    CPC分类号: G02B7/102 H04N5/232

    摘要: A zoom lens driving apparatus always detects a position of an image magnification varying lens section, and drives the image magnification varying lens section in accordance with a preset relationship between the position of the image magnification varying lens section and a zoom driving speed in such a manner that the driving speed becomes higher on one side, where the focal length of the zoom lens corresponding to the position of the image magnification varying lens section is small, than on another side where the focal length is large. Accordingly, the amount of focal shift, which in the zoom lens of the inner focusing system would otherwise abruptly increase with increasing focal length, is significantly suppressed, so that an auto focus adjusting mechanism or a focus correcting device effective during zooming, provided in the zoom lens, can function satisfactorily as to follow the focal shift of the zoom lens, whereby the lens control of a superior response can always be achieved.

    摘要翻译: 变焦透镜驱动装置总是检测图像倍率变化透镜部的位置,并且以这种方式根据图像倍率变化透镜部的位置和变焦驱动速度之间的预设关系来驱动图像倍率变化透镜部 与焦距在另一侧相比,与图像倍率变化透镜部分的位置对应的变焦镜头的焦距在一侧的驱动速度变高。 因此,内聚焦系统的变焦透镜中随着焦距增加而突然增加的焦点偏移量被显着地抑制,使得自动聚焦调节机构或焦点校正装置在变焦期间有效,在 变焦镜头能够令人满意地起到跟随变焦镜头的焦点偏移的作用,从而可以始终实现卓越响应的镜头控制。

    Zoom lens, still image camera comprising the zoom lens, and video camera comprising the zoom lens
    5.
    发明申请
    Zoom lens, still image camera comprising the zoom lens, and video camera comprising the zoom lens 有权
    变焦镜头,包括变焦镜头的静止图像摄像机和包括变焦镜头的摄像机

    公开(公告)号:US20050195482A1

    公开(公告)日:2005-09-08

    申请号:US11067432

    申请日:2005-02-22

    IPC分类号: G02B15/173 G02B27/64

    CPC分类号: G02B15/173 G02B27/646

    摘要: Provided from the object side are a first lens group (11) having a positive refracting power and fixed to the image plane, a second lens group (12) having a negative refracting power and a magnification varying action exhibited when moving along the optical axis, a third lens group (13) fixed to the image plane and having a positive refracting power, and a fourth lens group (14) movable along the optical axis so as to maintain the image plane moving with the movements of the second lens group (12) and of the object in a fixed position from a reference plane. Hence the movement of the image due to camera shake is corrected by moving the whole third lens group (13) vertically to the optical axis. The size is reduced and the aberrations are small because the whole groups whose optical performance is united are decentered.

    摘要翻译: 从物体侧提供具有正折射率并固定在像平面上的第一透镜组(11),当沿着光轴移动时呈现负折射力和倍率变化动作的第二透镜组(12) 固定到图像平面并具有正折射力的第三透镜组(13)和沿着光轴可移动的第四透镜组(14),以便保持像平面随着第二透镜组(12)的移动而移动 )和物体在参考平面的固定位置。 因此,通过将整个第三透镜组(13)垂直移动到光轴来校正由于相机抖动引起的图像的移动。 尺寸减小,像差小,因为光学性能结合的整个组都偏心。

    Zoom lens and video camera using the same
    6.
    发明授权
    Zoom lens and video camera using the same 失效
    变焦镜头和摄像机使用相同

    公开(公告)号:US06542312B1

    公开(公告)日:2003-04-01

    申请号:US09539134

    申请日:2000-03-30

    IPC分类号: G02B1514

    CPC分类号: G02B15/173

    摘要: A zoom lens is described that includes: a first lens group having positive refracting power and fixed with respect to an image plane; a second lens group having negative refracting power and varying power, wherein the power is varied by moving along an optical axis; a third lens group having positive refracting power and fixed with respect to the image plane; and a fourth lens group having: positive refracting power and moving along an optical axis so as to keep the image plane varied by movement of the second lens group and an object at a predetermined position from a reference surface. The first, second, third, and fourth lens groups are disposed from the object side to the image plane side in this order. The second lens group is composed of two negative lenses and one positive lens. The third lens group is composed of two positive lenses and one negative lens. The fourth lens group is composed of a positive lens. The second to fourth lens groups include at least one aspherical surface, respectively.

    摘要翻译: 描述了一种变焦透镜,包括:具有正折射率并且相对于像平面固定的第一透镜组; 具有负折射力和变化功率的第二透镜组,其中通过沿着光轴移动来改变功率; 具有正折射率并相对于像面固定的第三透镜组; 以及第四透镜组,具有:正折射力并且沿着光轴移动,以便通过第二透镜组和物体在参考表面的预定位置的移动来保持图像平面的变化。 第一透镜组,第二透镜组,第三透镜​​组和第四透镜组依次从物体侧到像面侧。 第二透镜组由两个负透镜和一个正透镜组成。 第三透镜组由两个正透镜和一个负透镜组成。 第四透镜组由正透镜组成。 第二至第四透镜组分别包括至少一个非球面。

    Device for calculating diffraction efficiencies of a diffraction lens, lens with grating element, and optical system for reading
    7.
    发明授权
    Device for calculating diffraction efficiencies of a diffraction lens, lens with grating element, and optical system for reading 有权
    用于计算衍射透镜,具有光栅元件的透镜和用于读取的光学系统的衍射效率的装置

    公开(公告)号:US06349000B1

    公开(公告)日:2002-02-19

    申请号:US09154355

    申请日:1998-09-16

    IPC分类号: G02B518

    CPC分类号: G02B5/1895 G02B5/1876

    摘要: A device for calculating diffraction efficiencies of a diffraction lens divided into a plurality of regions, each region comprising at least one grating ring, comprises a first memory for storing information about diffraction efficiencies of the regions; a second memory for storing information about weights corresponding to the regions; and a first processor for retrieving information from the first and the second memory, and calculating diffraction efficiencies of the entire diffraction lens using the formula E j = ∑ m = 1 M ⁢ W m ⁢ η mj ( 1 ) wherein: j: integer indicating the order of diffraction light Ej: diffraction efficiency for j-th order diffraction light of the diffraction lens M: positive integer (M>1) indicating the number of regions for which the diffraction efficiency is calculated m: index of the region for which the diffraction efficiency is calculated &eegr;mj: diffraction efficiency for the j-th order diffraction light of the m-th region (stored in the first memory) Wm: weight for the m-th region (stored in the second memory means). Thus, the diffraction efficiency of the diffraction lens can be calculated easily.

    摘要翻译: 一种用于计算分成多个区域的衍射透镜的衍射效率的装置,每个区域包括至少一个光栅环,包括用于存储关于所述区域的衍射效率的信息的第一存储器; 第二存储器,用于存储与所述区域对应的权重的信息; 以及第一处理器,用于从第一和第二存储器检索信息,并且使用公式计算衍射透镜的衍射效率:j:表示衍射光的次数的整数Ej:衍射的第j级衍射光的衍射效率 透镜M:表示计算衍射效率的区域数的正整数(M> 1)m:衍射效率计算区域的折射率jj第m区的第j级衍射光的衍射效率 (存储在第一存储器中)Wm:第m区域的重量(存储在第二存储装置中)。因此,可以容易地计算衍射透镜的衍射效率。

    Projection lens
    8.
    发明授权
    Projection lens 失效
    投影镜头

    公开(公告)号:US4767199A

    公开(公告)日:1988-08-30

    申请号:US854754

    申请日:1986-04-21

    CPC分类号: G02B13/18 G02B13/16

    摘要: A projection lens for projecting an image appearing on a cathode-ray tube onto a screen, small in residual aberrations, having a high imaging performance, also having a large aperture ratio and a wide field angle, suitable for a video projector having a high definition of, say, 1,125 scanning lines. The projection lens has, successively from the screen side, a Gauss type lens system, a positive lens mainly for enlarging the aperture ratio, and a negative lens mainly for widening the field angle, which negative lens has a strongly concave surface at the screen end.

    摘要翻译: 一种投影透镜,用于将出现在阴极射线管上的图像投影到屏幕上,具有高成像性能的小像差,还具有大的开口率和宽视角,适用于具有高清晰度的视频投影仪 例如,1,125条扫描线。 投影透镜从屏幕侧依次具有高斯型透镜系统,主要用于扩大开口率的正透镜和主要用于加宽场角的负透镜,该负透镜在屏幕端具有强凹面 。

    Surface acoustic wave device comprising piezoelectric substrate having
zinc oxide layer on .alpha.-alumina layer
    9.
    发明授权
    Surface acoustic wave device comprising piezoelectric substrate having zinc oxide layer on .alpha.-alumina layer 失效
    表面声波装置包括在α-氧化铝层上具有氧化锌层的压电基片

    公开(公告)号:US4236095A

    公开(公告)日:1980-11-25

    申请号:US30906

    申请日:1979-04-17

    CPC分类号: G10K11/36 H03H3/08

    摘要: A surface acoustic wave device comprising a piezoelectric substrate which comprises an .alpha.-alumina layer as a base region and a zinc oxide layer as a surface region formed on the .alpha.-alumina layer. Preferably the two layers are each made of a single crystal, and the thickness of the zinc oxide layer and an angle between a crystallographic axis of the zinc oxide single crystal and the direction of wave propagation are determined so as to fall within optimum ranges, respectively. This device features an increased phase velocity and an augmented value for the electromechanical coupling coefficient and accordingly is of use at very-high to ultra-high frequencies.

    摘要翻译: 一种表面声波装置,包括压电基片,其包含作为基底区域的α-氧化铝层和形成在所述α-氧化铝层上的表面区域的氧化锌层。 优选地,两层各自由单晶制成,并且氧化锌层的厚度和氧化锌单晶的结晶轴与波传播方向之间的角度分别被确定为在最佳范围内 。 该装置具有增加的相速度和机电耦合系数的增加值,并因此在非常高到超高频率下使用。

    Zoom lens, still image camera comprising the zoom lens, and video camera comprising the zoom lens
    10.
    发明授权
    Zoom lens, still image camera comprising the zoom lens, and video camera comprising the zoom lens 有权
    变焦镜头,包括变焦镜头的静止图像摄像机和包括变焦镜头的摄像机

    公开(公告)号:US07586683B2

    公开(公告)日:2009-09-08

    申请号:US12005077

    申请日:2007-12-20

    IPC分类号: G02B27/64

    CPC分类号: G02B15/173 G02B27/646

    摘要: Provided from the object side are a first lens group (11) having a positive refracting power and fixed to the image plane, a second lens group (12) having a negative refracting power and a magnification varying action exhibited when moving along the optical axis, a third lens group (13) fixed to the image plane and having a positive refracting power, and a fourth lens group (14) movable along the optical axis so as to maintain the image plane moving with the movements of the second lens group (12) and of the object in a fixed position from a reference plane. Hence the movement of the image due to camera shake is corrected by moving the whole third lens group (13) vertically to the optical axis. The size is reduced and the aberrations are small because the whole groups whose optical performance is united are decentered.

    摘要翻译: 从物体侧提供具有正折射率并固定在像平面上的第一透镜组(11),当沿着光轴移动时呈现负折射力和倍率变化动作的第二透镜组(12) 固定到图像平面并具有正折射力的第三透镜组(13)和沿着光轴可移动的第四透镜组(14),以便保持像平面随着第二透镜组(12)的移动而移动 )和物体在参考平面的固定位置。 因此,通过将整个第三透镜组(13)垂直移动到光轴来校正由于相机抖动引起的图像的移动。 尺寸减小,像差小,因为光学性能结合的整个组都偏心。