发明名称 |
Zoom lens |
摘要 |
A device includes a zoom lens having a focusing lens the position of which varies according to a zooming operation, a first moving part arranged to mechanically move the focusing lens according to the zooming operation, and a second moving part arranged to move the focusing lens in such a way as to electrically correct any shift of focus that results from the movement of the focusing lens caused by the first moving part.
|
申请公布号 |
US5790902(A) |
申请公布日期 |
1998.08.04 |
申请号 |
US19970790588 |
申请日期 |
1997.01.29 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
MIZOUCHI, SATORU;KATO, MASATAKE;EGUCHI, MASAHARU;OGAWA, HIDEKI |
分类号 |
G02B7/10;(IPC1-7):G01J1/20 |
主分类号 |
G02B7/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|