Correcting fixture

Abstract

The invention relates to a correction fixture for correcting the position of an optical element in a lens barrel in the process of assembling a lens module. The correction fixture comprises a post rod and an air bag arranged at one end part of the post rod, wherein the air bag is inflated to bulge outwards for pushing and pressing the optical element, so as to adjust the position of the optical element in the lens barrel. Compared with the prior art, the correction fixture utilizes the air bag on the end part of the post rod to push and press the optical element; because air pressure in the air bag is equal, the pressure of the air bag on the surface of a lens which contacts the air bag is equal and the optical element is stressed equally; therefore, the lens is positioned on a correct position in the lens barrel and is not inclined, the probability of axial superposition of various optical elements assembled in the lens module is improved, and the imaging quality of the lens module is improved.

Description

technical field [0001] The invention relates to a correction jig, in particular to a correction jig used in the assembly process of a lens module. Background technique [0002] In recent years, with the development of multimedia technology, the scope of application of lens modules has become wider and wider, such as being applied to electronic products such as digital cameras, video cameras, and mobile phones with camera functions. While people are pursuing the miniaturization of digital cameras, video cameras and mobile phones with camera functions, they also put forward higher requirements for the image quality of the objects to be photographed. It largely depends on whether the optical axes of the lenses in the lens module coincide during the assembly process. Therefore, the assembly of the lens must be quite precise, so as to increase the probability of optical axis coincidence, thereby improving the imaging quality of the lens module. [0003] A lens module usually i...

AI Technical Summary

Problems solved by technology

Due to human factors and other factors, the pressure rod 13 sometimes tilts and does not enter the lens barrel 12 in the direction of the central axis of the lens barrel 12, thus causing the lens 11 loaded into the lens barrel 12 to tilt, which in turn causes subsequent loading of the lens, etc. The element continues to tilt, thus causing the optical axes of each lens in the lens module to be difficult to overlap, reducing the imaging quality of the lens module (lpheus W. The paper "Zoom lens calibration for wind tunnel measurements" published on ) revealed the influence of misalignment of the optical axes of the lenses in the lens module)

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