发明名称 Wide angle zoom lens of two-group construction
摘要 A wide angle zoom lens system comprises a forward group which is a divergent lens group, and a rearward group which is a convergent lens group. The divergent lens group includes, in succession from the object side, at least two negative meniscus lenses having their convex surfaces facing the object side and only one positive meniscus lens having its convex surface facing the object side. The convergent lens group has, in succession from the object side, a biconvex positive lens having its surface of sharper curvature facing the object side, a single or doublet positive lens having its surface of sharper curvature facing the object side, a biconcave negative lens having its surface of sharper curvature facing the image side, a positive meniscus lens having its convex surface facing the image side, and a positive meniscus lens having its convex surface facing the object side. The lens system satisfies predetermined conditions.
申请公布号 US4380375(A) 申请公布日期 1983.04.19
申请号 US19800153788 申请日期 1980.05.27
申请人 NIPPON KOGAKU K. K. 发明人 MOGAMI, SATOSHI
分类号 G02B13/02;G02B13/04;G02B15/16;G02B15/177;(IPC1-7):G02B15/14 主分类号 G02B13/02
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