Laser Optics Bessel-Lens

Bessel Lens

Bessel Lens is used in deep laser cutting application. 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. 

Part NoWavelength (nm)FFL (mm)WD (mm)Max Input Beam Dia (mm)Max Cutting Length (mm)Spot Size Range (µm)Total Length (mm)
BESL-355-10-D10355249.0410.70101.5< 1376.00
BESL-532-10-D10532212.7011.86101.5< 1202.84
BESL-1064-10-D101064243.9012.72102.0< 1233.18
BESL-1064-D20-T61064308.508.88206.0< 3301.60
BESL-1064-D20-T121064330.0515.002012.0< 5315.05

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

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