Dual-spectrum cylindrical mirror laser beam expanding 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 field of optics and relates to a laser beam expander system, in particular to a laser beam expander system with a double-band cylindrical mirror. Background technique [0002] In recent years, with the development of high-power laser technology, the requirements for laser shaping technology are getting higher and higher, especially the requirements for multi-spectrum laser shaping technology are also increasing. For example, the laser beam expansion system requires high collimation accuracy , multi-spectral collimation, excellent image quality of outgoing light after shaping (no aberration), low energy loss rate and other requirements. [0003] At present, in the research and 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 collimation and beam expansion. It is very inappropriate for a l...

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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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