Title:
LENS BARREL AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/189532
Kind Code:
A1
Abstract:
A lens barrel includes: a variable-power optical system including a focus lens group; a focus actuator configured to move the focus lens group supported by a support forward or backward in a direction of the optical axis to change a shooting distance; and a moving unit configured to, in response to receiving a driving force for changing a zoom magnification, move a position of the focus lens group in the direction of the optical axis to a position corresponding to the changed zoom magnification. The moving unit is configured to move the focus lens group in the direction of the optical axis by the driving force such that a change in a shooting distance due to a change in the zoom magnification is within a predetermined tolerance when the focus lens group is at a position corresponding to the minimum shooting distance, at every zoom magnification.
Inventors:
KOBAYASHI TAKAHIRO (JP)
KOBAYASHI TOMOAKI (JP)
NAKAYAMA TAKAHIRO (JP)
KOBAYASHI TOMOAKI (JP)
NAKAYAMA TAKAHIRO (JP)
Application Number:
PCT/JP2020/010959
Publication Date:
September 24, 2020
Filing Date:
March 12, 2020
Export Citation:
Assignee:
RICOH CO LTD (JP)
KOBAYASHI TAKAHIRO (JP)
KOBAYASHI TOMOAKI (JP)
NAKAYAMA TAKAHIRO (JP)
KOBAYASHI TAKAHIRO (JP)
KOBAYASHI TOMOAKI (JP)
NAKAYAMA TAKAHIRO (JP)
International Classes:
G02B7/10; G02B15/14
Domestic Patent References:
| WO2018221723A1 | 2018-12-06 |
Foreign References:
| US20100046085A1 | 2010-02-25 | |||
| US20140168793A1 | 2014-06-19 | |||
| US20070153403A1 | 2007-07-05 |
Attorney, Agent or Firm:
SAKAI, Hiroaki (JP)
Download PDF:
Previous Patent: FLOOR FINISHING MATERIAL
Next Patent: FLAME-RETARDANT RESIN COMPOSITION, AND CABLE AND WIRE HARNESS USING SAME
Next Patent: FLAME-RETARDANT RESIN COMPOSITION, AND CABLE AND WIRE HARNESS USING SAME