Title:
LENS DEVICE, CAMERA SYSTEM AND CAMERA
Document Type and Number:
Japanese Patent JP2003029125
Kind Code:
A
Abstract:
To provide a lens device and a camera system, by which a focusing lens is moved with high accuracy to a focal position, in a short time by an AF system.
A first actuator A and a second actuator B are provided as drive sources to drive focusing lenses L1-L7 in the optical axis direction, and the drive speed of the focusing lens by the first actuator is set higher than that of the focusing lens by the second actuator, and also the drive position resolution of the focusing lens by the second actuator is set higher than that of the focusing lens by the first actuator.
Inventors:
KASHIBA SEIICHI
KAWAI TORU
SUZUKI TAKASHI
ISHIKAWA MASAAKI
SATO SHIGEKI
KAWAI TORU
SUZUKI TAKASHI
ISHIKAWA MASAAKI
SATO SHIGEKI
Application Number:
JP2001218697A
Publication Date:
January 29, 2003
Filing Date:
July 18, 2001
Export Citation:
Assignee:
CANON KK
International Classes:
G03B13/36; G02B7/04; G02B7/08; G02B7/28; H04N5/232; (IPC1-7): G02B7/08; G02B7/04; G02B7/28; G03B13/36; H04N5/232
Attorney, Agent or Firm:
Masayuki Kishida (2 outside)