为了寻求更加有效的激光切割玻璃的方法，提高玻璃的切割质量，在激光热应力切割玻璃的基本原理的基础上，比较了单束聚焦CO2激光与单束非聚焦CO2激光切割玻璃的优劣，提出了双束CO2激光热应力切割的方法。先用一束低功率聚焦的CO2激光在玻璃表面划线，而后用非聚焦的CO2激光沿着该划线进行扫描，在热应力的作用下使玻璃沿着该划线分离，从而实现玻璃的切割。实验分析了单束和双束CO2激光热应力切割玻璃的切割效果。结果表明，相对于单束CO2激光切割的方法，利用双束CO2激光进行玻璃的切割，既可以保证切缝沿既定方向扩展又可以提高切面的光洁度，是一种比较理想的玻璃切割方法。

To explore a new method to improve the glass cutting quality, the principle of glass laser cutting by thermal stress was introduced. The advantages and the disadvantages of cutting glass by single focused and un-focused CO2 laser beams were analyzed, respectively. A novel method of cutting glass by dual CO2 laser beams was proposed, where a focused CO2 laser was applied to pre-score a line on the glass surface and the other unfocused laser beam was applied to separate the substrate along the scoring line. The cutting qualities with single and dual laser beams were compared experimentally. The results show that cutting glass by dual laser beams is an ideal cutting method, which not only makes the cutting path in a straight line but also makes the cutting profile very smooth.