Dark red dots mark the locations of supernova remnants * * 屏保中暗红的点表示已知的超新星遗迹* * 。
2.
3 for dots marking , we design a convenient software , it can pick - up the characters dots information directly from dots characters - library , then make it more convenient for user . 4 two type of laser markers have been used to some product - lines . three different projects are developed 4 、为了实现在线激光打标功能，分别提出了精确定位方案、快速扫描方案和分步扫描方案三种不同的打标方案，三种打标方案均采用点阵字符打标，分别可适用于不同的在线打标要求。
3.
The innovat ions of this thesis are as follow : by using dots marking method we achieve high on - line marking , and we design the accurate orientation project , the high scan project , and the step scan project , each of them can be applied for different marking requirement the main contents of thesis are as follows : 1 the development of laser industry , the prospect and technically advantage of laser marking is reviewed 本文的创新之处为，采用点阵式标记方法实现了高速在线打标功能，并分别设计了精确定位方案、快速扫描方案和分步扫描方案三种不同的打标方案，可适用于不同的在线打标要求。主要内容如下： 1 、分析了国内外激光加工业特别是激光打标机及其市场现状、发展趋势和市场前景等。
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