F-Theta Lens 1064nm M85 Thread for YAG Fiber Laser — Scan Field 70×70 to 300×300 mm (2.76×2.76 to 11.81×11.81 in), Focal Length 100–420 mm (3.94–16.54 in)

Precision: High-purity F-theta lens designed for 1064 nm YAG fiber laser marking systems, offering clear engraving across selectable scan fields and reliable M85 threaded mounting for galvo heads.

Specifications:

• Compatible With: YAG fiber laser marking machines, galvo systems
• Wavelength: 1064 nm (Fiber YAG)
• Mount / Thread: M85 (85 mm / 3.35 in)
• Focal Length: 100–420 mm (3.94–16.54 in)
• Scan Field / Area: 70×70 mm to 300×300 mm (2.76×2.76 in to 11.81×11.81 in)
• Input Aperture: 10–14 mm (0.39–0.55 in)
• Maximum Scanning Angle: 20°–31°
• Material: High purity fused silica / HQ quartz
• Structure / Shape: Spherical
• Use: Laser marking machine (galvo scanning systems)
• Certification: CE
• Semi-finished Product: No
• Installation Note: Designed for galvo heads with an M85 thread (installation diameter 85 mm / 3.35 in). If your galvo head measures ~79 mm, an adapter ring is required.
• Application Guidance: For optimal engraving clarity choose smaller field sizes with lower power machines. Recommended field sizes: 50–220 mm for 20–30 W systems; 300×300 mm fields are best with >50 W and quartz lenses for longer service life. Example: a 300×300 mm lens typically has a focal length of 420 mm and back working length ≈ 467 mm (18.39 in); ensure your machine column lift accommodates this.

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