Title:
ZOOM LENS, ZOOM LENS SYSTEM AND CAMERA SYSTEM
Document Type and Number:
Japanese Patent JP3363836
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a zoom lens capable of preventing the fluctuation of a viewing angle by appropriately follow-driving a zoom part to correct the fluctuation of the viewing angle at the time of starting the driving of a focus part and at the time of reversing it.
SOLUTION: This zoom lens 101 is provided with a control means 5 for setting zoom control command information for driving and controlling the zoom part Z in order to correct the fluctuation of the viewing angle in the case of driving and controlling the focus part. The control means sets a zoom control command signal Zoffset for correcting the fluctuation of the viewing angle by adding signal variation Offset necessary to start the real driving of the zoom part when a state where driving and controlling the focus part is not commanded is changed to a state where it is commanded or when the driving and controlling direction Focus of the focus part is reversed.
Inventors:
Kenichi Kubo
Application Number:
JP16266299A
Publication Date:
January 08, 2003
Filing Date:
June 09, 1999
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B7/08; G02B7/28; G02B15/00; G03B13/36; H04N5/232; (IPC1-7): G02B7/28; G02B15/00; G03B13/36; H04N5/232
Domestic Patent References:
| JP8201676A | ||||
| JP829661A | ||||
| JP10282396A | ||||
| JP8334673A |
Attorney, Agent or Firm:
Masayuki Kishida (2 outside)