... for Laser engraving machine and Laser marking machines. Mounting thread: M85*1mmFocal Length: 162mmBack Focal Length:195mmWork Wavelenght:1064nmScan angle:+/- 25 degreescan field ... used in micro material processing , such as drilling, dicing, fine cutting, structuring, perforating, marking and welding. Our high precision F-Theta lens ... to get the details. F-Theta Scan lens for Laser Marking Machine