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1. (US20180275381) ZOOM LENS AND IMAGE PICKUP APPARATUS USING THE SAME

专利局 : 美国
申请号: 15717804 申请日: 27.09.2017
公布号: 20180275381 公布日: 27.09.2018
公布类型: A1
国际专利分类:
G02B 15/163
G02B 27/64
G PHYSICS
02
光学
B
光学元件、系统或仪器
15
具有改变放大率装置的光学物镜
14
利用一个透镜或多个透镜或透镜组相对于成像平面作轴向移动,以便连续改变物镜的等效焦距
16
具有在一种透镜或透镜组和另一个透镜或透镜组之间的相互影响的非线性相对移动的
163
在一个固定的透镜或透镜组的前面有第一个可移动的透镜或透镜组和第二个可移动的透镜或透镜组
G PHYSICS
02
光学
B
光学元件、系统或仪器
27
其他光学系统;其他光学仪器
64
利用稳定像的横向和斜向位置的光学元件的成像系统
CPC:
G02B 15/163
G02B 27/646
申请人: OLYMPUS CORPORATION
发明人: Kazuteru KAWAMURA
优先权数据:
标题: (EN) ZOOM LENS AND IMAGE PICKUP APPARATUS USING THE SAME
摘要: front page image
(EN)

A zoom lens includes in order from an object side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a rear-side lens unit, and an aperture stop. The second lens unit includes a first sub-unit having a negative refractive power and a second sub-unit having a negative refractive power, and the rear-side lens unit includes a third lens unit having a positive refractive power which is disposed nearest to object. The first lens unit includes at least a negative lens and a positive lens and the first sub-unit includes at least a negative lens and a positive lens. The third lens unit includes at least two lens components having a positive refractive power, and the following conditional expressions (1) and (2) are satisfied:


61≤νd1G_max_p  (1), and


−0.03≤Tp2Ga_min_p≤0.0165  (2).