Projection lens and method of using same
    11.
    发明授权
    Projection lens and method of using same 失效
    投影镜头及其使用方法

    公开(公告)号:US5483382A

    公开(公告)日:1996-01-09

    申请号:US123133

    申请日:1993-09-17

    申请人: David Kappel

    发明人: David Kappel

    摘要: A new and improved projector lens arrangement which can automatically adjusted for focusing purposes in an easily and convenient manner according to a novel focusing method of the present invention. The projection lens arrangement generally includes three groups of optical elements aligned along a common optical axis with a variable vertex length and wide field coverage angle. One element group near the object is a doublet having a negative element with a concave surface and a positive element being bi-convex having one surface near the image complementarily shaped to the concave surface of the negative element.

    摘要翻译: 根据本发明的新颖的聚焦方法,一种新的和改进的投影透镜装置,可以以容易和方便的方式自动调节聚焦目的。 投影透镜装置通常包括沿共同光轴对准的三组光学元件,其具有可变顶点长度和宽视场覆盖角度。 物体附近的一个元件组是具有凹形表面的负极元件和双元件,双元件具有两个凸起,其中一个表面靠近图像的负面元件的凹表面互补地成形。