发明授权
- 专利标题： Zoom lens system
- 专利标题（中）： 变焦镜头系统
-
申请号： US784177申请日： 1997-01-15
-
公开(公告)号： US6067196A公开(公告)日： 2000-05-23
- 发明人: Yasushi Yamamoto , Yuichiro Ori
- 申请人： Yasushi Yamamoto , Yuichiro Ori
- 申请人地址： JPX Osaka
- 专利权人： Minolta Co., Ltd.
- 当前专利权人： Minolta Co., Ltd.
- 当前专利权人地址： JPX Osaka
- 优先权： JPX8-005198 19960116; JPX8-007900 19960119; JPX8-296756 19961108; JPX8-296765 19961108
- 主分类号： G02B15/16
- IPC分类号： G02B15/16 ; G02B27/44 ; G02B3/08 ; G02B5/18 ; G02B15/14
摘要：
A zoom lens system has the first and second lens units. During zooming from a wide-angle end to a telephoto end, the lens units are moved to decrease a distance therebetween. The first lens unit has a positive refractive power. The second lens unit has a negative refractive power. The zoom lens system is provided with at least one surface having a power to diffract light.
公开/授权文献
- US4638553A Method of manufacture of semiconductor device 公开/授权日：1987-01-27