Focal length, spot size and depth of field
Quick answer
What each lens does to the beam, and which job it suits. There are 12 tables in this set, each one worked through for a specific combination.
- Laser
1.5 inch lens (38.1 mm) for engraving fine detail and photographs
A 1.5 inch (38.1 mm) lens focuses a CO2 beam to roughly 0.064 mm with about 0.61 mm of usable depth. That makes it a good match for eng...
- Laser
1.5 inch lens (38.1 mm) for general purpose cutting and engraving
A 1.5 inch (38.1 mm) lens focuses a CO2 beam to roughly 0.064 mm with about 0.61 mm of usable depth. That makes it a poor match for gen...
- Laser
1.5 inch lens (38.1 mm) for cutting 6 mm and thicker material
A 1.5 inch (38.1 mm) lens focuses a CO2 beam to roughly 0.064 mm with about 0.61 mm of usable depth. That makes it a poor match for cut...
- Laser
2.0 inch lens (50.8 mm) for engraving fine detail and photographs
A 2.0 inch (50.8 mm) lens focuses a CO2 beam to roughly 0.086 mm with about 1.09 mm of usable depth. That makes it a good match for eng...
- Laser
2.0 inch lens (50.8 mm) for general purpose cutting and engraving
A 2.0 inch (50.8 mm) lens focuses a CO2 beam to roughly 0.086 mm with about 1.09 mm of usable depth. That makes it a good match for gen...
- Laser
2.0 inch lens (50.8 mm) for cutting 6 mm and thicker material
A 2.0 inch (50.8 mm) lens focuses a CO2 beam to roughly 0.086 mm with about 1.09 mm of usable depth. That makes it a poor match for cut...
- Laser
2.5 inch lens (63.5 mm) for engraving fine detail and photographs
A 2.5 inch (63.5 mm) lens focuses a CO2 beam to roughly 0.107 mm with about 1.7 mm of usable depth. That makes it a poor match for engr...
- Laser
2.5 inch lens (63.5 mm) for general purpose cutting and engraving
A 2.5 inch (63.5 mm) lens focuses a CO2 beam to roughly 0.107 mm with about 1.7 mm of usable depth. That makes it a good match for gene...
- Laser
2.5 inch lens (63.5 mm) for cutting 6 mm and thicker material
A 2.5 inch (63.5 mm) lens focuses a CO2 beam to roughly 0.107 mm with about 1.7 mm of usable depth. That makes it a good match for cutt...
- Laser
4.0 inch lens (101.6 mm) for engraving fine detail and photographs
A 4.0 inch (101.6 mm) lens focuses a CO2 beam to roughly 0.171 mm with about 4.35 mm of usable depth. That makes it a poor match for en...
- Laser
4.0 inch lens (101.6 mm) for general purpose cutting and engraving
A 4.0 inch (101.6 mm) lens focuses a CO2 beam to roughly 0.171 mm with about 4.35 mm of usable depth. That makes it a poor match for ge...
- Laser
4.0 inch lens (101.6 mm) for cutting 6 mm and thicker material
A 4.0 inch (101.6 mm) lens focuses a CO2 beam to roughly 0.171 mm with about 4.35 mm of usable depth. That makes it a good match for cu...