公开(公告)号：US5436767A

公开(公告)日：1995-07-25

申请号：US236680

申请日：1994-05-02

申请人： Takayuki Suzuki ,  Susumu Takahashi ,  Kimihiko Nishioka

发明人： Takayuki Suzuki ,  Susumu Takahashi ,  Kimihiko Nishioka

IPC分类号： G02B23/24 ,  G02B13/18

CPC分类号： G02B9/12 ,  G02B23/243

摘要： An objective lens system for endoscopes comprising, in order from the object side, a first lens component having negative refractive power, a second lens component having positive refractive power and a third lens component having positive refractive power; wherein astigmatism is corrected favorably by using an aspherical surface in the third lens component or an aperture stop is arranged between the second lens component and an image surface of the objective lens system, and aberrations including chromatic aberration are corrected favorably.

摘要翻译： 一种用于内窥镜的物镜系统，包括从物体侧开始具有负折光力的第一透镜部件，具有正屈光力的第二透镜部件和具有正折光力的第三透镜部件; 其中通过在第三透镜部件中使用非球面来适当地校正像散，或者在第二透镜部件和物镜系统的图像表面之间布置孔径光阑，并且有利地校正包括色像差的像差。