Lens barrel, image-capturing device, and method for controlling lens barrel

Patent metadata

Field	Value
Publication number	US-10852502-B2
Application number	US-201816164421-A
Country	US
Kind code	B2
Filing date	Oct 18, 2018
Priority date	Jul 20, 2011
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

A lens barrel in which tilt adjustment can be made depending on the position of a lens unit in the optical axis direction. This lens barrel includes: at least three guide bars provided so as to extend along the optical axis direction; a driving unit that respectively drives the at least three guide bars in the optical axis direction; a lens frame holding unit that holds an image-capturing lens, the lens frame holding unit being attached to at least three guide bars and being driven in the optical axis direction by the at least three guide bars; and a control unit that controls said at least three linear actuators so as to adjust the respective drive amounts in the optical axis direction of the at least three guide bars and to tilt the lens frame holding unit from a direction orthogonal to the optical axis.

First claim

What is claimed is:

1. A lens barrel comprising:
a lens holding frame that holds a lens;
a support unit that supports the lens holding frame; and
a drive unit that moves the support unit in an optical axis direction, and changes a lens tilt of the lens with respect to the optical axis direction, based on at least one of a position of the lens in the optical axis direction, a focal length and an object distance.

2. The lens barrel according to claim 1 , wherein the drive unit is an actuator.

3. The lens barrel according to claim 1 , comprising a plurality of the support units.

4. The lens barrel according to claim 3 , comprising a plurality of the drive units that respectively move the plurality of support units.

5. The lens barrel according to claim 4 , wherein
the plurality of drive units change the lens tilt in response to drive amounts of the plurality of drive units being respectively adjusted.

6. The lens barrel according to claim 1 , comprising:
a storage unit that stores information related to at least one of the position of the lens in the optical axis direction, the focal length and the object distance, and information related to the lens tilt.

7. An imaging device, comprising the lens barrel according to claim 1 .

8. A lens barrel comprising:
a lens holding frame that holds a lens;
a support unit that supports the lens holding frame;
a drive unit that moves the support unit in an optical axis direction, and changes a lens tilt of the lens with respect to the optical axis direction; and
a position detection unit that detects a position of the lens holding frame,
wherein the drive unit changes the lens tilt, based on the position of the lens holding frame detected by the position detection unit.

9. A lens barrel comprising:
a lens holding frame that holds a lens;
a support unit that supports the lens holding frame;
a drive unit that moves the support unit in an optical axis direction, and changes a lens tilt of the lens with respect to the optical axis direction; and
an operation unit that changes a focal length or an object distance,
wherein the drive unit changes the lens tilt, when the focal length or the object distance are changed by the operation unit.

10. The lens barrel according to claim 9 , comprising:
an operation amount detection unit that detects an operation amount of the operation unit,
wherein the drive unit changes the lens tilt, based on the operation amount of the operation unit detected by the operation amount detection unit.

Assignees

• Nikon Corp

Inventors

• Fukino Kunihiro

Classifications

• H04N23/67

  Focus control based on electronic image sensor signals · CPC title

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• G02B7/102 Primary

  controlled by a microcomputer (cameras with interchangeable lenses G03B17/14) · CPC title

• G02B15/145

  having five groups only · CPC title

• G03B2205/0023

  by tilting or inclining one or more optical elements with respect to the optical axis · CPC title