Influence of laser spot focusing positions in field lens on surface quality was investigated in 532 nm nanosecond laser cutting of solar float glass. Bottom to up cutting method with X–Y helix was selected, and 16 groups of experiments have been designed with different parameters (including cutting speed, frequency, helix width and overlap rate). 6 groups of them with a long distance between field lens center and laser spot focusing position were selected to obtain maximum height values of cutting surface profile. Results indicated that cutting surface qualities are at the same level when offset distance (defined from cutting line to center point of the field lens) is under 20 mm. Conversely, as offset distance was longer than 20 mm, surface quality was in an instable state. The results also showed that white spots on the surface were randomly distributed, while burrs were localized on the side where laser cuts in.

在太阳能浮法玻璃的532 nm纳秒激光切割中，研究了物镜中激光点聚焦位置对表面质量的影响。选择了使用X–Y螺旋的自下而上的切割方法，并设计了16组具有不同参数（包括切割速度，频率，螺旋宽度和重叠率）的实验。选择其中6组，其物镜中心与激光点聚焦位置之间的距离较长，以获得切割表面轮廓的最大高度值。结果表明，当偏移距离（从切割线到物镜的中心点定义）小于20 mm时，切割表面质量处于同一水平。相反，当偏移距离大于20mm时，表面质量处于不稳定状态。