光学元件标识升级公告
有折射型贝塞尔加工头和衍射型贝塞尔加工头可供选择
用于激光加工系统终端光束整形，可得到特定焦深的无衍射贝塞尔光束
单模激光适用，易集成，小像差，切割效果崩边小、热影响区域小、无锥度
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