公开(公告)号：EP3312657A1

公开(公告)日：2018-04-25

申请号：EP17196544.5

申请日：2017-10-16

申请人： Olympus Corporation

发明人： ABE, Kenichiro ,  KONISHI, Hirokazu ,  SAKAKURA, Masahiro ,  KASAHARA, Takashi ,  FUJITA, Yuso

IPC分类号： G02B21/02

CPC分类号： G02B21/025 ,  G02B9/18 ,  G02B21/02

摘要： An objective (1;2;3;4) includes a first lens group (G1) that has a positive refractive power and a second lens group (G2) that has a negative refractive power. The objective includes a first negative lens and satisfies 0.005 ≤ d o 1 / h o 1 ≤ 0.1 0.005 ≤ h min / h l ≤ 0.72 10 mm ≤ L ≤ 100 mm 0.1 ≤ L / f ≤ 31 when d o1 is a thickness of the first negative lens, h o1 is an axial marginal ray height on a lens surface on the object side of the first negative lens, h min is a minimum value of an axial marginal ray height in the second lens group (G2), h 1 is a height of an axial marginal ray on a lens surface of the objective that is situated closest to the image side, L is a length of the objective, and f is a focal length of the objective.

摘要翻译： 物镜（1; 2; 3; 4）包括具有正屈光力的第一透镜组（G1）和具有负屈光力的第二透镜组（G2）。 该物镜包括第一负透镜，并且当do1是第一负透镜的厚度时，满足0.005≤do1/ho1≤0.10.005≤hmin/hl≤0.7210mm≤L≤100mm0.1≤L/f≤31，ho1是轴向 第一负透镜的物体侧的透镜表面上的边缘光线高度，hmin是第二透镜组（G2）中的轴向边缘光线高度的最小值，h1是透镜表面上的轴向边缘光线的高度 位于最靠近像侧的物镜，L是物镜的长度，f是物镜的焦距。