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Interchangeable lens type digital camera

A digital video camera and video camera technology, applied in the direction of camera, image communication, camera body, etc., can solve problems not specifically described

Inactive Publication Date: 2011-04-06
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This problem is not specifically described in the above prior art

Method used

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  • Interchangeable lens type digital camera
  • Interchangeable lens type digital camera
  • Interchangeable lens type digital camera

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0031] FIG. 1 is a block diagram showing the overall structure of an interchangeable lens type digital camera according to a first embodiment of the present invention. The interchangeable lens type digital camera shown in FIG. 1 includes a camera body 1 and an interchangeable lens 2.

[0032] The interchangeable lens 2 includes a focus lens 3, a lens driving section 4, a lens control section 5, a lens contact point section 8, an encoder 15, a lens data storage 20, and a temperature sensor 22. The focusing lens 3 is a lens included in the imaging lens of the interchangeable lens 2. The focus adjustment of the imaging lens is performed by moving the focus lens 3. The lens driving section 4 moves the focus lens 3 in the direction of its optical axis. When the interchangeable lens 2 is mounted on the camera body 1, the lens control section 5 is connected to the camera body 1 so that it can freely communicate with the camera body 1 and control the lens driving section 4.

[0033] The...

no. 2 approach

[0123] Next, the second embodiment of the present invention will be described below. In the first embodiment, for the infinity-side drive limit position, ΔP is subtracted from the infinity-side drive limit position in the lens data memory 20 stored in the interchangeable lens 2, and the obtained position is set as a new Drive limit position on the infinity side. In addition, for the nearest neighbor side drive limit position, ΔP is added to the nearest neighbor side drive limit position stored in the lens data memory 20, and the obtained position is set as a new nearest neighbor side drive limit position. When the infinity side drive limit position or the nearest neighbor side drive limit position is changed to a position shifted by ΔP toward the infinity side mechanical collision position or the nearest neighbor side mechanical collision position, it may be the infinity side drive limit position or nearest neighbor position The side drive limit position overlaps with the infi...

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PUM

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Abstract

An interchangeable lens type digital camera includes a camera main body and an interchangeable lens. The camera main body includes a control section which communicates with an interchangeable lens, and controls focus adjustment of the interchangeable lens by a hill-climbing AF system. A judgment section judges a characteristic of the interchangeable lens on the basis of communication between the interchangeable lens and the control section. The interchangeable lens includes a focus lens for performing focus adjustment. A focus lens drive section drives the focus lens. A lens control section communicates with the control section, and controls the focus lens drive section to perform focus adjustment.; The control section changes a previously determined drive enabled range of the focus lens on the basis of a judgment result of the judgment section to perform focus adjustment of the interchangeable lens.

Description

Technical field [0001] The present invention relates to an interchangeable lens type digital camera, and more particularly to an interchangeable lens type digital camera provided with an automatic focusing control device. Background technique [0002] Hitherto, as an auto focus (AF) mechanism of an interchangeable lens type AF single-lens reflex camera using silver halide film or a digital type, a through lens (TTL) phase difference AF mechanism has been used in many cases. In the TTL phase difference AF system, a defocus detection mechanism for AF is provided in the camera body. In addition, the focus lens in the interchangeable lens is driven by a motor inside the lens or inside the camera based on the defocus amount detected by the defocus detection mechanism, thereby performing a focus control operation. In addition, in compact digital cameras, video cameras, etc., so-called hill climbing AF is generally used, which is used to perform contrast detection by using high frequen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B17/14H04N5/225H04N5/232
CPCG03B13/32H04N5/23212H04N23/672H04N23/673H04N23/63
Inventor 小林一也
Owner OLYMPUS CORP