Detection device and detection method for backstroke difference of electric zoom lens

Abstract

The invention provides a detection device and detection method of electric zoom lens return stroke difference. The detection device comprises a driving and controlling module, an image obtaining module and a detecting module; the driving and controlling module comprises an MCU, a driving circuit, a stepping motor, a power source and a lens support; the driving circuit is used for driving a stepping motor for zooming of an electric zoom lens; the lens support is used for fixing the electric zoom lens; the image obtaining module is used for obtaining images of the electric zoom lens; the detecting module is arranged in an upper computer, and the upper computer and the driving and controlling module constitute serial port communication; the detecting module comprises a detecting controlling unit based on a MATLAB and an image processing unit based on the MATLAB. By means of the detection device and detection method of the electric zoom lens return stroke difference, the blank of the priorart is filled up, and the electric zoom lens return stroke difference of electric zoom lenses with different modal numbers can be detected.

Description

technical field [0001] The invention belongs to the field of optical device detection, and in particular relates to a detection device and a detection method for the return stroke difference of an electric zoom lens. Background technique [0002] With the development of society and the advancement of science and technology, as a lens manufacturer, it is not only necessary to simply produce lenses, but also to conduct sufficient tests on all aspects of lenses before they can be introduced to the market. In addition to controlling the appearance of the lens, the movement of the lens, and the imaging of the lens, the control of the return distance difference of the zoom lens has also become the demand of more and more camera customers. [0003] At present, domestic and foreign lens manufacturers have almost no detection devices or detection methods for the return distance difference of electric zoom lenses, and they are unable to provide lens return distance difference and rela...

AI Technical Summary

Problems solved by technology

[0003] At present, domestic and foreign lens manufacturers have almost no detection devices or detection methods for the return distance difference of electric zoom lenses, and they are unable to provide lens return distance difference and related parameters or indicators for customers who purchase electric zoom lens products. The non-negligible error and impact of the objective return difference on the zoom and focus of the lens has brought a lot of inconvenience to the user of the lens and reduced the user experience.

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