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Automatic focusing device

An automatic focusing and optical device technology, which is applied in the focusing device, focusing device, camera focusing device, etc., can solve problems such as the coaxiality of the optical axis, and achieve the effect of realizing the focusing function.

Inactive Publication Date: 2009-10-28
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] To sum up, the lens modules that are driven by stepping motors, induction coils, and piezoelectric elements to achieve autofocus are all mechanically moved to achieve focus, and there is whether the optical axis between the lens module and the photoreceptor is coaxial The problem

Method used

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Experimental program
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Embodiment Construction

[0019] see figure 1 and figure 2 , the autofocus device 100 of the present invention includes a lens barrel 1 , a lens mount 2 , an optical device 3 , and an image detection package 4 . The lens barrel 1 , the optical device 3 and the image detection package 4 are all installed in the lens holder 2 . The lens barrel 1 is mounted on the top of the lens holder 2 , the optical device 3 and the image detection package 4 are sequentially installed in the lens holder 2 , and the optical device 3 is installed between the lens barrel 1 and the image detection package 4 .

[0020] The lens barrel 1 is a cylindrical body with a built-in lens 10 and an external thread 12 on its outer wall.

[0021] The lens holder 2 is also a hollow cylindrical body, and its inner diameter is slightly larger than that of the lens barrel 1 . An inner thread 20 is provided on the inner wall of the lens holder 2 , and the inner thread 20 can cooperate with the outer thread 12 on the outer wall of the le...

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Abstract

The present invention provides an automatic focus device, which includes a lens barrel, a lens mount and an image detection package, the lens barrel and the image detection package are installed in the lens mount; wherein, the auto focus device further includes An optical device placed in a lens holder, the optical device includes an upper substrate, a lower substrate and four piezoelectric pillars supporting the upper and lower substrates, an intermediate layer is formed between the upper and lower substrates and the four piezoelectric pillars , the middle layer has a built-in stretchable transparent capsule filled with transparent liquid that can transmit light, and the upper and lower substrates are transparent substrates that can transmit visible light, and the optical device is installed between the lens barrel and the image detection package , and the thickness can be changed.

Description

technical field [0001] The invention relates to an automatic focusing device, in particular to an automatic focusing device which has a simple structure and realizes focusing by non-mechanical movement. Background technique [0002] At present, digital cameras have become more and more popular, and the public has higher and higher requirements for digital cameras. And there have been many mobile phones with additional digital camera functions on the market, and the specifications of the digital camera for mobile phones are also getting higher and higher, from the earliest 300,000 pixels to the digital camera for mobile phones with megapixels now. In addition to pixel requirements, the public is increasingly concerned about the zoom function of mobile phone digital cameras. The auto-zooming digital cameras on the market often adopt two mechanisms of stepping motor drive and induction coil drive auto-focus, both of which use the method of mechanically moving the lens to achie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B13/36G03B13/32G03B30/00
CPCG02B13/001H04N5/2254G02B7/08G03B3/02G02B7/021H04N23/55
Inventor 张仁淙
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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