Bessel lens is applicable in laser processing technology particularly in laser cutting and deep-hole drilling of steel, glass and other materials. Bessel beam, which has 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.
Our company offers Bessel lens at two wavelengths 355nm and 1064nm with the tunability of output beam focus depth 0.7-1.5mm with respect to the input beam size 4-6mm.
Input beam @ 1/e²
Depth of Focus
Focus line width