Laser Focus Spot Size Calculator
How to find your spot size in mm.
Fill out this form and check the results at bottom.
You may check the laser source spec sheet for info.
Beam Diameter at Lens (usual
7
mm):
Lens Focal Length [mm]:
F63 (50×50 mm)
F100 (70×70 mm)
F130 (90×90 mm)
F160 (110×110 mm)
F210 (140×140 mm)
F225 (150×150 mm)
F254 (175×175 mm)
F290 (200×200 mm)
F330 (220×220 mm)
F420 (300×300 mm)
F541 (400×400 mm)
Beam Quality (M²):
Wavelength [nm]:
1064 nm (Fiber)
10,600 nm (CO₂)
Beam Diameter at Focus:
—
Depth of Field (DOF):
—
Recommended linespace #1:
—
Recommended linespace #2:
—
for coin depth engraving.