Bessel Lenses
Bessel lenses are used in deep laser cutting applications. Bessel beam, which has a small focusing spot size and long focus depth is generated by allowing laser light to pass through a combination of the axicon lens and focusing lens. The tunability of depth of focus of the output beam by adjusting the size of the input beam diameter is the most attractive feature of this Bessel beam optical system.
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| Part No | Wavelength (nm) | FFL (mm) | WD (mm) | Max Input Beam Dia (mm) | Max Cutting Length (mm) | Spot Size Range (µm) | Total Length (mm) |
|---|---|---|---|---|---|---|---|
| BESL-355-10-D10 | 355 | 249.04 | 10.70 | 10 | 1.5 | < 1 | 376.00 |
| BESL-532-10-D10 | 532 | 212.70 | 11.86 | 10 | 1.5 | < 1 | 202.84 |
| BESL-1064-D10-T2 | 1064 | - | 10.80 | 10 | 6.0 | - | 238.00 |
| BESL-1064-D20-T12 | 1064 | 330.05 | 15.00 | 20 | 12.0 | < 5 | 315.05 |
No. | Pulse Energy | No. of Pulse | Frequency | Spot Distance | Focusing Range | Cutting Result | Splinter Effect |
1 | 620μJ | 6 | 50k | 5 | 5.6mm | Smooth | Easy to Break |
2 | 714μJ | 6 | 50k | 3 | 5.8mm | Smooth | Easy to Break |
3 | 714μJ | 6 | 50k | 4 | 5.8mm | Smooth | Easy to Break |
4 | 714μJ | 6 | 50k | 5 | 5.8mm | Smooth | Easy to Break |
5 | 810μJ | 6 | 50k | 3 | 6mm | Smooth | Easy to Break |
6 | 810μJ | 6 | 50k | 4 | 6mm | Smooth | Easy to Break |
7 | 810μJ | 6 | 50k | 5 | 6mm | Smooth | Easy to Break |
