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Toothing device for wood connections, in particular can be used on saws

机译:用于木材连接的磨齿装置,特别是可用于锯

摘要

729,667. Optical objectives. BERTELE, L. Oct. 16, 1952 [Oct. 24, 1951], No. 25952/52. Class 97 (1). In an optical objective having three members of which the first member is a simple positive lens L1, the second member is a negative meniscus triplet L2, L3, L4 convex towards the object and the third member is a positive doublet L5, L6 having a cemented surface r8 convex towards the object, the air space between the front lens and the triplet being of the form of a negative lens and the other air space being of the form of a positive lens with its lens curved face on the image side, the positive lens L6 of the doublet has a refractive index at least 0.18 greater than that of the negative lens L5 and the radius of curvature of surface r8 is between 0.5 and 0.85 times the equivalent focal length. Specifications 681,456 and 692,013 are referred to.
机译:729,667。光学物镜。 L.BERTELE,1952年10月16日[10月。 1951年4月24日],编号25952/52。 97类(1)。在具有三个部件的光学物镜中,第一部件是简单的正透镜L1,第二部件是朝向物体凸出的负弯月面三元组L2,L3,L4,第三部件是具有胶合的正双重透镜L5,L6表面r8朝向物体凸出,前透镜和三元组之间的空气空间为负透镜,另一空气空间为正透镜,其透镜曲面在像侧,正双合透镜的透镜L6的折射率比负透镜L5的折射率大至少0.18,并且表面r8的曲率半径在等效焦距的0.5至0.85倍之间。参考规格681,456和692,013。

著录项

  • 公开/公告号DE923389C

    专利类型

  • 公开/公告日1955-02-10

    原文格式PDF

  • 申请/专利权人 MEYER EDY;

    申请/专利号DE1952M012845

  • 发明设计人 MEYER EDY;

    申请日1952-02-06

  • 分类号B27F1/04;B27F1/12;

  • 国家 DE

  • 入库时间 2022-08-23 23:26:02

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