Dual-spectral cylindrical mirror laser beam expander system

Abstract

The invention belongs to the field of optics and relates to a dual-spectrum cylindrical mirror laser beam expanding system. The dual-spectrum cylindrical mirror laser beam expanding system comprises a first plus lens and a second plus lens and also comprises a first cylindrical mirror and a second cylindrical mirror. The first plus lens, the first cylindrical mirror, the second cylindrical mirror and the second plus lens are arranged on the same optical axis in sequence. The invention provides the dual-spectrum cylindrical mirror laser beam expanding system with the advantages that the energy utilization ratio of a laser device is improved, traditional light beams can be expanded simultaneously in meridian and sagittal directions at different magnification ratios, and the accuracy is improved.

Description

Technical field [0001] The invention belongs to the optical field, and relates to a laser beam expansion system, in particular to a dual-spectrum cylindrical mirror laser beam expansion system. Background technique [0002] In recent years, with the development of high-power laser technology, the requirements for laser shaping technology have become higher and higher, especially for multi-spectral laser shaping technology. For example, laser beam expansion systems require high collimation accuracy. , Multi-spectral collimation, after shaping, the emitted light has good image quality (no aberration), and low energy loss rate is required. [0003] At present, in the development of various laser equipment, the common laser beam expansion system is either using the traditional beam expansion system design method, using two common lens combinations for collimating beam expansion. In this way, although the processing and adjustment are easy to achieve, For the laser spot with the specif...

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Problems solved by technology

[0003] At present, in the research and development of various laser equipment, the common laser beam expansion system either uses the traditional beam expansion system design method to use two common lens combinations for collimation and beam expansion. It is very inappropriate for the laser spot of the specified specification shape and size (the field diaphragm must be used to realize it), and the energy is lost; or for the laser monochromatic beam expansion, the collimation and beam expansion of the multi-spectral beam cannot be realized.

In addition, in the beam expander system with different spot sizes, in order to achieve different magnifications in the meridional and sagittal directions, it is necessary to study a new laser spot expander system to solve the problem of bidirectional magnification matching

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