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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
IPC分类号: G02F1/13 , G02F1/1335 , G02F1/13357 , G03B21/00 , G03B21/28 , H04N5/74 , G02B9/20 , G02B13/18
CPC分类号: H04N9/3141 , G03B21/28 , H04N5/7441 , G09G2340/04 , G09G2340/0414 , G09G2340/0421 , G09G2340/0471 , G09G2340/0478 , G09G2340/0485
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。