Manufacturing method of optical microstructure, machine table and light guide plate of machine table

Abstract

The invention discloses a manufacturing method of an optical microstructure, a machine table and a light guide plate of the machine table. The manufacturing method of the optical microstructure of the multimode laser machining machine table includes the steps that a substrate is provided; a first laser beam and a second laser beam are irradiated to a beam combiner, and the first laser beam and the second laser beam have different laser modes. The multimode laser machine table used for executing and manufactured through the manufacturing method of the optical microstructure of the multimode laser machining machine table comprises a first laser resonant cavity, a second laser resonant cavity, a bearing platform and a machining unit. The light guide plate is provided with a plurality of optical microstructures. According to the multimode laser machining machine table, the method and the light guide plate of the machine table, the first laser beam coincides with the second laser beam through the beam combiner, a micro concave part and a sunken part can be formed in the substrate through one-time machining and irradiating, the time needed for machining is effectively shortened, and therefore the production efficiency is improved, and a better flattening effect can be achieved on the surface of the substrate.

Description

technical field [0001] The present invention relates to the field of laser processing, in particular to a manufacturing method, machine and light guide plate for forming optical microstructures through multi-mode laser processing. Background technique [0002] The light guide plate is a component used in the backlight module to guide light. It transmits the light provided by the light source to the remote side of the light guide plate through the principle of total reflection, and uses several optical structures arranged on it to destroy the total reflection of light. , to guide the light to the light-emitting surface to form a uniform surface light source. [0003] The traditional method used to form the optical structure of the light guide plate is to directly form dots on the light guide plate through the designed optical structure pattern through screen printing. The size of the optical structure is limited, which in turn affects the output quality and light uniformity....

AI Technical Summary

Problems solved by technology

[0008] However, although the above method can reduce the impact of the protrusions on the overall optical structure pattern, it must undergo secondary laser processing, and the distribution of the protrusions is not fixed, so the second laser beam must also be processed one by one. Adjust the bombardment position according to the distribution of the protrusions

And it needs to irradiate at intervals along the periphery of the micro concave hole, which takes a very long processing time

Furthermore, as the number of concave holes included in the optical structure pattern increases, the processing time must also be lengthened accordingly

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