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Autofocus system using multiple lenses and method thereof

An auto-focus and multi-lens technology, applied to TV system components, focusing devices, color TV components, etc., can solve problems such as focus failure, depth calculation inaccuracy, long focus time, etc., and achieve the effect of avoiding influence

Active Publication Date: 2017-08-25
ALTEK SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Two-dimensional focusing needs to move the lens multiple times to obtain multiple contrast values, resulting in a longer focusing time
[0007] However, the three-dimensional focusing of the prior art has a disadvantage. If repeated patterns appear in the focus areas of the images of the two lenses, it is easy to cause inaccurate depth calculations, and incorrect depths will also cause focus failure.

Method used

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  • Autofocus system using multiple lenses and method thereof
  • Autofocus system using multiple lenses and method thereof
  • Autofocus system using multiple lenses and method thereof

Examples

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Embodiment Construction

[0033] figure 1 A block diagram of a first embodiment of an autofocus system using multiple lenses for the present invention. Such as figure 1 As shown, the auto-focus system 11 is suitable for an image capture device 10 having a first lens 20 , a second lens 30 , a first lens driving module 70 and a second lens driving module 71 .

[0034]The first lens driving module 70 and the second lens driving module 71 respectively include a stepping motor and a linkage mechanism. The linkage mechanism connects the stepping motor and the optical lens groups in the first lens 20 and the second lens 30, so it can be The rotation direction and steps of the stepping motor drive the optical lens group to move, thereby changing the imaging effect of the optical lens group on the image sensor (sensor). For the convenience of description, the first lens driving module 70 and the second lens driving module 71 are referred to below as the first lens driving module 70 and the second lens driving...

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Abstract

The present invention provides a multi-lens auto-focus system and its method, wherein multi-lens is used and multiple focusing methods are combined to achieve both fast and accurate focusing system. In particular, the effect of repeated images on the depth-based focusing method can be avoided.

Description

technical field [0001] The invention relates to an automatic focusing system, in particular to an automatic focusing system using multiple lenses and a method thereof. Background technique [0002] Generally speaking, an auto focus function is one of the important functions of today's video cameras, such as digital cameras or digital video cameras. Through the automatic focus function, camera users can quickly find the focal length of the lens group, improve the success rate of shooting results, and improve image quality. In addition, the autofocus function can also correctly track fast-moving objects to lower the technical threshold of videography or photography. [0003] In the prior art, the basic operation of the autofocus function is to automatically control the movement of the lens through the camera system, so that the image of the object is clearly imaged on the photosensitive unit. When the position of the object is different, the focus position of the lens group ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/28G03B13/36H04N5/232
CPCG03B13/36G02B7/38H04N23/673
Inventor 黄裕程张文彦康仲嘉
Owner ALTEK SEMICON