您的位置: 首页 > 农业专利 > 详情页

SYSTÈME OPTIQUE D'OBJECTIF GRAND-ANGULAIRE
专利权人:
OLYMPUS CORPORATION
发明人:
申请号:
EP14787932.4
公开号:
EP2990847A1
申请日:
2014.04.03
申请国别(地区):
EP
年份:
2016
代理人:
摘要:
Excellent aberration correction, suitability for high-definition and high-pixel solid state imaging elements, a small outer diameter of an end and reduction in manufacturing cost are achieved.A wide-angle objective optical system includes, in order from an object side to an image side: a first lens group (G1); and a second lens group (G2) having positive refractive power. The first lens group includes, in order from the object side to the image side: a first lens (L1) having negative refractive power; a second lens (L2) having a concave face as an object-side face and having negative refractive power; a brightness diaphragm (S); and a third lens (L3) having positive refractive power. The following condition expressions are satisfied: -0.5<;f/f1<;0.5 0.3<;f/f2<;0.7 wherein f1, f2 and f are focal distances of the first lens group, the second lens group, and the entire wide-angle objective optical system, respectively.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

意 见 箱

匿名:登录

个人用户登录

找回密码

第三方账号登录

忘记密码

个人用户注册

必须为有效邮箱
6~16位数字与字母组合
6~16位数字与字母组合
请输入正确的手机号码

信息补充