Method for measuring size of mobile phone lens based on micro-CT

Abstract

The invention provides a method for measuring the size of a mobile phone lens based on a micro-CT. The micro-CT does not need a specific clamp, does not need physical parameters such as the refractive index and the transmittance of the lens, is high in scanning precision, can observe the internal and external structures in a lossless manner, and obtains a 3D solid model. The internal size of the lens is measured through CT, and the measurement precision is improved from the aspects of the CT hardware equipment level, the measurement method and the calculation method. The method provided by the invention solves the problem that the traditional contact measurement method needs a specific clamp and cannot obtain the internal assembly size and the 3D solid model, and improves the measurement precision of the internal structure size of the mobile phone lens.

Description

technical field [0001] The invention relates to a method for measuring the size of a mobile phone lens based on micro-CT, which belongs to the technical field of CT detection size measurement. Background technique [0002] The geometric dimensions of mobile phone lenses, such as lens thickness, air gap, optical effective diameter, surface accuracy, etc., play a vital role in the optical performance of the lens, and very small dimensional deviations will affect the imaging quality of the lens. Lens reverse engineering is a technology to obtain the internal structure and internal dimensions of the lens through a series of testing methods. Through the lens reverse technology, not only can the internal structure size of the lens be quickly obtained, but also the design database data can be added to provide design inspiration for the lens optical engineering design of a lens with better performance. [0003] At this stage, the methods for obtaining the internal dimensions of mob...

AI Technical Summary

Problems solved by technology

[0005] At present, in the aspect of CT size measurement, the manual measurement by the operator is basically the main method, which will lead to a large deviation between the measured size and the actual size, especially for some precision components that require extremely strict dimensional accuracy, and the extremely small size Changes can have a fatal impact on its performance

In addition to manual measurement, some companies at home and abroad are equipped with industrial CT automatic measurement software, the basic principle of which is based on the "half-height width" method of image pixels, but when the contour size and effective beam width are close, it is difficult to measure

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