Focusing lens group and laser processing applied optics system

Abstract

The invention relates to a focusing lens group and a laser processing applied optics system. The focusing lens group comprises a first lens of the focusing lens group, a second lens of the focusing lens group, a third lens of the focusing lens group, a fourth lens of the focusing lens group and a fifth lens of the focusing lens group which are placed on the optical axis in sequence along the incident direction of the ultraviolet laser. The focal length of the focusing lens group is 30mm and the entrance pupil diameter thereof is 15mm. The invention removes the chromatic aberration of the ultraviolet laser used by the laser processing system and the visible illuminated light used by an illumination system, ensures the focus point of the ultraviolet laser and the focus point of the visible illuminated light to coincide, removes the disturbance of the chromatic aberration with imaging in an imaging monitoring system, ensures the imaging monitoring system to be clear, accurately monitors and locates the processing position and ensures the accuracy and quality of ultraviolet processing. Meanwhile, the focus point of the visible illuminated light can be adopted to align the focus point of the ultraviolet laser and accurately locate the position of the workpiece to be processed.

Description

【Technical field】 [0001] The invention relates to an optical device and system, in particular to a focusing lens group and an optical system for laser processing applications. 【Background technique】 [0002] With the continuous development of laser processing, the types of media to be processed are increasing, and the processed effects are required to be more and more refined, especially for some special materials. Because UV ultraviolet laser has the advantages of extremely small focus spot and small processing heat-affected zone, the use of UV ultraviolet laser for laser processing is becoming more and more widespread. [0003] UV ultraviolet laser processing is mainly used for ultra-fine marking, marking and scribing of special materials, etc., especially for cutting and scribing in the IT field. Its working conditions are monitored in real time. Since ultraviolet light is invisible to the human eye, real-time monitoring cannot be carried out during the working process,...

AI Technical Summary

Problems solved by technology

Since ultraviolet light is invisible to the human eye, real-time monitoring cannot be carried out during the work process, and the precise positioning of the workpiece to be processed will bring a lot of trouble to the engraving work

[0004] Traditionally, the visible illumination light vision system is used to monitor the ultraviolet ray processing, but due to the different wavelengths of the visible illumination light and the ultraviolet ray, resulting in chromatic aberration, the vision system cannot accurately monitor the ultraviolet ray processing, and accurately locate the position of the workpiece to be processed

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