High quality at low cost...
The lens is designed for Laser engraving machine and Laser marking machines.

Mounting thread: M85*1mmFocal Length: 162mmBack Focal Length:195mmWork Wavelenght:1064nmScan angle:+/- 25 degreescan field size(diam.): 141mmSquare field size: 100*100mmIncident beam diam.(Max.): 12mmRcommended Mirror Separation:16mmX mirror distance: 32mmEncircled Energy (80% energy): 12.5µmMax. Diameter of lenses:66 mmConstruction: 3E/3G