Focal length adjusting device and method for fixed-focal-length camera

Abstract

The invention discloses a focal length adjusting device and method for a fixed-focal-length camera in to the technical field of fixed-focus cameras. The device comprises a fixed-focal-length camera focal length adjusting device comprising an automatic adjusting device for adjusting camera focal length. The automatic adjusting device comprises a driving collection module, an analysis control moduleand a mechanical arm. The mechanical arm is close to the camera. The camera is connected with the driving collection module. The output end of the driving collection module is connected with the analysis control module, and the output end of the analysis control module is connected with the mechanical arm. The working efficiency can be improved. Consistency of each focusing result can be ensuredin the large-batch assembly and installation process or the production process. Eye fatigue caused by long-term eye use of eyes of an operator is avoided, the health of the operator is protected and the skill requirement on the operator is reduced due to the fact that all judgments are judged by an algorithm.

Description

technical field [0001] The invention relates to the technical field of fixed focal length cameras, in particular to a focal length adjustment device and an adjustment method of a fixed focal length camera. Background technique [0002] With the development of terminal equipment, the front cameras of mobile phones, tablets, smart watches, scanning components of payment equipment, and cameras in surveillance cameras are generally fixed focal length cameras, and focal length is an important performance indicator of the lens, and the essence of focal length adjustment is It reflects the adjustment of the object distance. In a large number of fixed camera point devices, fixed focal length lenses are currently used. By means of hyperfocal imaging, the object distance can be obtained before and after the focal plane of the target surface within a certain range. A clearer image is what we often call depth of focus and depth of field. Objects beyond this range will be blurred. [0...

AI Technical Summary

Problems solved by technology

[0004] 1. The control accuracy of the manual adjustment of the focal length is insufficient, and the focal length error of the finished product is relatively large, and the consistency is relatively large;

[0005] 2. The efficiency of manually adjusting the focus is low, and it takes a long time to adjust the focus too far and then reverse it;

[0006] 3. Judging the clarity of the image by human eyes, the consistency of clarity in batches cannot be guaranteed, and the error is relatively large;

[0007] 4. Judging the clarity of the image by the human eye, due to long-term work, it is easy to cause the operator to overuse the human eye, and long-term work will pose a threat to the eye health of the operator

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