Title:
光学要素の固定構造
Document Type and Number:
Japanese Patent JP6759622
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a fixing structure for an optical element, with improved precision in fixing position of the optical element installed in a lens barrel.SOLUTION: A fixing structure for fixing a third lens frame 6C which is installed in a lens barrel and is eccentrically adjustable in a direction vertical to an optical axis with respect to a third lens cylinder (barrel member) 5C, to the third lens cylinder by a fixing screw (fastening member) 9 is provided with a ball bearing (friction reduction member) 10 for reducing a frictional force between the third lens frame 6C and a head part 91 of the fixing screw 9. A torque in fastening the fixing screw 9 can be prevented from being transmitted to the third lens frame 6C, by the ball bearing 10, and the precision in fixing position of a third lens group L3 to the third lens cylinder 5C.SELECTED DRAWING: Figure 2B
Inventors:
Yuji Kogure
Application Number:
JP2016033768A
Publication Date:
September 23, 2020
Filing Date:
February 25, 2016
Export Citation:
Assignee:
Ricoh Imaging Co., Ltd.
International Classes:
G02B7/02
Domestic Patent References:
| JP2008180762A | ||||
| JP2007247810A | ||||
| JP2002533156A | ||||
| JP8128513A | ||||
| JP6347893A | ||||
| JP11231192A |
Attorney, Agent or Firm:
Akio Suzuki