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1. 发明申请

US20020048093A1 Imaging optical system 有权
标题翻译：成像光学系统
公开(公告)号：US20020048093A1
公开(公告)日：2002-04-25
申请号：US09940540
申请日：2001-08-29
申请人： Nikon Corporation
发明人： Kenzaburo Suzuki , Hidenobu Harada
IPC分类号： G02B015/14 , G02B009/08 , G02B009/00 , G02B013/04
CPC分类号： G02B13/04
摘要： An imaging optical system having superior optical performance with the improved correction of chromatic aberration over a wide wavelength range extending from the visible wavelength range to the infrared wavelength range is provided. According to one aspect, an imaging optical system includes, in order from an object, a front lens group GF with a positive refractive power having at least one lens element, an aperture stop SP and a rear lens group GR with a positive refractive power having at least one lens element. The front lens group GF includes a double convex positive lens GT arranged to the most object side. At least one of the front lens group GF and the rear lens group GR includes a triple cemented lens GS being adjacent to the aperture stop SP having a negative refractive power as a whole composed of a first positive lens, a negative lens, and a second positive lens. Predetermined conditional expression is satisfied.
摘要翻译：提供了一种成像光学系统，其具有优异的光学性能，并且在从可见光波长范围延伸到红外波长范围的宽波长范围内改善了色差校正。根据一个方面，成像光学系统按照从物体起依次包括具有至少一个透镜元件的正折光力的前透镜组GF，具有正折光力的孔径光阑SP和后透镜组GR，至少一个透镜元件。前透镜组GF包括布置在最物体侧的双凸正透镜GT。前透镜组GF和后透镜组GR中的至少一个包括与具有负折射力的孔径光阑SP相邻的三重胶合透镜GS整体由第一正透镜，负透镜和第二透镜组正镜片满足预定条件表达式。

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