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Lens barrel and imaging device

A technology of lens barrel and focusing lens, which is applied in installation, optics, instruments, etc., can solve problems such as inability to maintain focus, and achieve the effect of preventing interference and reducing size

Active Publication Date: 2021-10-15
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this lens barrel, as the zoom magnification is changed, the shooting distance changes (the focal plane is moved), so the lens barrel cannot keep the subject in focus

Method used

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  • Lens barrel and imaging device
  • Lens barrel and imaging device
  • Lens barrel and imaging device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] A lens barrel and an imaging apparatus including the same according to an embodiment of the present invention are described below with reference to the drawings.

[0027] figure 1 is a block diagram showing the configuration of the imaging device 1 according to the embodiment of the present invention.

[0028] Such as figure 1 As shown, the imaging apparatus 1 is a single-lens reflex camera, and includes a camera body 10 and a lens barrel 20 attachable to and detachable from the camera body 10 . The imaging device 1 is not limited to a single-lens reflex camera, and may be other types of imaging devices such as compact digital cameras, mirrorless single-lens reflex cameras, video cameras, and camcorders.

[0029] The camera body 10 includes a system controller 100, an operation unit 102, a drive circuit 104, a solid-state image sensor 106, a signal processing circuit 108, an image processing engine 110, a buffer memory 112, a liquid crystal display (LCD) 114, a read o...

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PUM

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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.

Description

technical field [0001] The present invention relates to a lens barrel and an imaging device. Background technique [0002] Lens barrels comprising variable-power optical systems are known. In such a lens barrel, as the zoom magnification is changed, the shooting distance changes (the focal plane is moved), so the lens barrel cannot keep the focus on the subject. [0003] For example, Patent Document 1 discloses a lens barrel capable of preventing defocus caused by a change in shooting distance during a zoom magnification change. [0004] The lens barrel disclosed in Patent Document 1 is configured to move the focus lens group and other lens groups, which are elements of the zoom optical system, along different trajectories when operating on the zoom operation ring, so that the lens barrel can Change the zoom magnification while preventing defocus caused by a change in shooting distance during the zoom magnification change. [0005] Citation list [0006] patent documents...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/10G02B15/14
CPCG02B7/10G02B15/14
Inventor 小林孝裕小林智晶中山贵裕
Owner RICOH KK