Patent ID: 11947184
Assignee: RICOH COMPANY, LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A lens barrel configured to be able to change zoom magnification, the lens barrel comprising:
a variable-power optical system including a focus lens group;
a support configured to movably support the focus lens group forward and backward in a direction of an optical axis of the lens barrel;
a focus actuator configured to move the focus lens group supported by the support forward or backward in the direction of the optical axis to change a shooting distance between a minimum shooting distance and infinity; and
a moving structure configured to, in response to receiving a driving force for changing the zoom magnification, move a position of the focus lens group and the support in the direction of the optical axis to a position corresponding to the changed zoom magnification,
the moving structure being configured to move the focus lens group and the support 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.