Method for automatically adjusting back focal length (BFL) of unthreaded lens based on inverse projection mode

An automatic adjustment and reverse projection technology, applied in the direction of optical components, instruments, optics, etc., to achieve the effect of ensuring consistency and improving accuracy

Active Publication Date: 2013-01-30
NINGBO SUNNY OPOTECH CO LTD
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

[0009] This method overcomes the problem of focusing after the lens mount is installed with threads, and adjusts the BFL (back focal lengh) of the lens to the micron level by using the back projection method before the module assembly, so that the module will not be adjusted after assembly. Need to refocus, so as to achieve the purpose of free focus and improve production efficiency

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  • Method for automatically adjusting back focal length (BFL) of unthreaded lens based on inverse projection mode
  • Method for automatically adjusting back focal length (BFL) of unthreaded lens based on inverse projection mode
  • Method for automatically adjusting back focal length (BFL) of unthreaded lens based on inverse projection mode

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Embodiment Construction

[0034] attached figure 1 In order to utilize the work flow implemented by the present invention, first assemble the lens base, clean and assemble the lens base before adjusting the lens BFL; after adjusting the lens BFL, fix the lens base, and at the same time carry out circuit board → SMT paste electronic components → The process of D / A chip attaching → HA mirror holder attaching can be inspected, packaged and shipped at this time.

[0035] as attached figure 2 And attached image 3 , a machine for automatically adjusting the lens BFL, including a parallel light source device 1, a standard plate 2, an image sensor 4, and a linear motion execution system 5, the parallel light source emitted by the parallel light source device 1 can be irradiated to the image sensor 4 through the standard plate 2, The lens mount group 3 is placed above the standard plate 2, the linear motion execution system 5 and the image sensor 4 are respectively connected to the PC through data lines, an...

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Abstract

The invention provides a method for automatically adjusting back focal length (BFL) of an unthreaded lens based on an inverse projection mode. The problem that a lens seat is mounted through a thread and is focused is solved. According to the method, the BFL (back focal length) of the lens is adjusted to a micron level in the inverse projection mode before a module is assembled, so that the assembled module is not required to be focused; and therefore, the aim of avoiding focusing is fulfilled, and the production efficiency is improved. A camera shooting module can be subjected to automatic unthreaded focusing, the method has the advantages of high accuracy, high efficiency and the like, the influence of subjective consciousness of an operator on the product quality is avoided during manual focusing, the consistency and stability of the product quality are improved, the burden of the operator and the labor cost of an enterprise are reduced, and compared with the traditional scheme, the method has the advantage that the overall dimension of the product can be small.

Description

technical field [0001] The invention relates to the camera module industry, and relates to a back-projection-based non-threaded automatic lens BFL method. Background technique [0002] With the development of technology and the maturity of focusing technology, focusing automation and simplification is an inevitable trend in the development of focusing technology. The early focus-free modules (such as reflow modules) used the lens mount as a All-in-one, suitable for 0.3M low-pixel resolution, and the resolution effect is average. At present, the focusing method with better effect is to adjust the focus through the thread after the module is assembled, but this method is inefficient and the thread torque fit problem has always plagued the module assembly factories. So it is necessary to develop another focusing process to meet the needs of production. [0003] The operation process and characteristics of the current conventional mobile phone camera module are as follows: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/62
Inventor 张宝忠张扣文赵波杰
Owner NINGBO SUNNY OPOTECH CO LTD
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