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Camera and making method thereof

A manufacturing method and camera technology, applied to cameras, instruments, focusing devices, etc., can solve problems such as changes, achieve high-precision focusing, and improve photographic performance

Inactive Publication Date: 2005-11-23
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a lens configuration with high FC sensitivity, the focus position may change greatly due to slight unevenness of the screw mechanism supporting the lens group or the cam groove.

Method used

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  • Camera and making method thereof
  • Camera and making method thereof
  • Camera and making method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Embodiments of the present invention will be described below with reference to the drawings.

[0028] figure 1 It is a block diagram showing an embodiment of a camera with a zoom lens according to the present invention, and an electrical configuration of the camera.

[0029] like figure 1 As shown, the camera with a zoom lens of this embodiment is provided with a CPU 1 as a control means, and this CPU 1 is a microcomputer for performing various controls on the entire camera system of this embodiment.

[0030] The above CPU1 is respectively connected with: EEPROM2, EXT terminal 3, PWSW4, BKSW5, RWSW6, 1RSW7, 2RSW8, ZUSW9, ZDSW10, LCD11, flash meter circuit part 12, distance measuring circuit part 15, photometry circuit part 20, zoom drive circuit part 23, zoom drive signal detection circuit section 25, focus drive circuit section 26, focus drive signal detection circuit section 28, shutter drive circuit section 29, shutter drive signal detection circuit section 31, fil...

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PUM

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Abstract

To provide a camera with a zoom lens, that can realize more accurate focusing and the improvement of the photographing performance of the camera. In this camera where the moving amount of a focusing lens in a zoom lens is calculated based on the focal distance information of the zoom lens and information stored in a memory, the information stored in the memory includes a focal distance showing an extreme value obtained by measuring the deviation of a focusing position from the image pickup surface of every focal distance of the zoom lens at the time of assembling and manufacturing the camera and an adjusted value in the focal distance showing the extreme value, and the extending amount of the focusing lens is calculated based on the present focal distance information of the zoom lens and data on the focal distances of a plurality of adjusted positions and a plurality of adjusted values stored in the memory.

Description

technical field [0001] The present invention relates to an automatic focus (AF) camera with zoom, in particular to a camera with a zoom lens whose focus position changes with the zoom position, a focus correction device for the camera, and a method for manufacturing the camera. Background technique [0002] Conventionally, a camera with a zoom lens has a structure in which a plurality of lens groups are provided in a zoom lens barrel (lens frame), and the focal length is changed by changing the interval between each lens group, and shooting is performed with an arbitrary image magnification. Furthermore, with a zoom lens, when performing a zooming operation (focal length changing operation), the focal plane is always constant at any focal length position. [0003] This kind of zoom lens, for example, makes the rotating frame rotate in the desired direction, and then a lens group fixed on the mirror frame utilizes a straight-moving screw mechanism to protrude or extend in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B13/36G06F13/10
Inventor 小林芳明
Owner OLYMPUS CORP
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