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A kind of camera module resolution inspection method

A camera module and inspection method technology, applied in the field of camera module quality control, can solve the problems of low resolution batch testing accuracy of camera modules, and achieve the effects of reducing the influence of horizontal and vertical differences and improving inspection accuracy

Active Publication Date: 2020-07-17
横店集团东磁有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the technical problem that the accuracy of batch testing of camera module resolution is low at present

Method used

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  • A kind of camera module resolution inspection method
  • A kind of camera module resolution inspection method
  • A kind of camera module resolution inspection method

Examples

Experimental program
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Embodiment 1

[0017] A camera module resolution inspection method, such as figure 1 As shown, the present embodiment comprises the following steps: A) setting several machine grabbing frames, and obtaining the MTF value of each grabbing frame; B) taking several camera module samples, and obtaining the Take the resolution in the frame; C) Obtain the minimum resolution of the qualified sample, and use the corresponding MTF value as the reference MTF value of each grabbing frame; D) Make each grabbing frame exceed the corresponding reference MTF value by the machine The camera module is regarded as a qualified product.

[0018] Such as figure 2 As shown, the current capture frame covers test lines in multiple directions, resulting in MTF being a combination of camera module resolutions in all directions, that is, the average value, which reduces the accuracy of the test. In this embodiment, the method for setting several grabbing frames of the machine is: set the grabbing frame of the machi...

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Abstract

The invention relates to the field of camera module quality control, in particular to a camera module resolution inspection method, which comprises the following steps of: A) setting a plurality of machine table grabbing frames, and obtaining an MTF value of each grabbing frame; B) taking a plurality of camera module samples, and carrying out manual test to obtain the resolution of the sample in each grabbing frame; C) obtaining the lowest resolution of the qualified sample, and taking the corresponding MTF value as a reference MTF value of each grabbing frame; And D) using the camera module with each grabbing frame exceeding the corresponding reference MTF value as a qualified detection product by the machine table. The method has the substantial effects that the positions of the grabbingframes are optimized, so that the grabbing frames only cover the test lines in a single direction, the influence of transverse and longitudinal differences is reduced, and the detection accuracy is improved by formulating reasonable reference values.

Description

technical field [0001] The invention relates to the field of camera module quality control, in particular to a camera module resolution inspection method. Background technique [0002] Camera modules are mainly used in electronic terminal products such as mobile phones, tablet computers, drones, and medical care, and have now become an indispensable daily item for people. Before the camera module leaves the factory, its resolution needs to be inspected to ensure that it is a qualified product. Resolution inspection is an important means to ensure and improve the quality of camera modules. The MTF value and resolution value of a lens are both accurate measurements that reflect the resolving power of a lens. The MTF value can be conveniently obtained automatically by the machine, while the resolution value needs to be read manually. Usually the qualified reference of the camera module is given in terms of resolution. Accurate resolution test requires human eyes to judge an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N17/00
Inventor 张奕贾康康许烨焓骆淑君葛凯悦
Owner 横店集团东磁有限公司
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