China CO2 Laser Beam Expander 3X for Marker Machine

The laser beam expander mainly has two purposes: one is to expand the diameter of the laser beam;second is to reduce the divergence angle of the laser beam. The purpose in the laser device is to extend the diameter of the beam. Due to the smaller diameter of the laser beam produced by the laser generator, compared to a beam without the beam expander, the beam after the beam expander can be focused smaller. in laser marking machine, the beam expander is always used with flat scan lens, making the marking spot finer, more accurate marking.

There are two types to fix the beam expander, one is to use M22 threaded connection, another is to fix directly on the adjustment frame with screws.

the shape of the laser beam expander can be divided into two, one is straight type, the other is trumpet. in most cases, the shape won't affect the performance, the same magnification beam expander lens installed in two shape are the same, you can replace each other.

The straight beam expander supplied by link laser, can be used to connect in two ways. the usual way is to use screws to place it in the frame slider. when the cap at one end of the beam expander is removed, you can use the threaded connection.
The most common type beam expander is derived from Galilean telescope which usually has one negative input lens and one positive output lens. The input lens presents a virtual beam focus at the output. For low expansion ratio, the Galilean telescope is most often employed due to simplicity, small package size and low cost. Beam expander is commonly used to magnify the laser diameter to be focused back in smaller spot size.
The absorbability of Zinc Selenide to the infrared wavelengths is low, and can flitter visible light, it is the top choice of beam expander lens.

Standard Beam Expander for CO2 Laser:Dia(mm)MagnificationLength(mm)Input(mm)Output(mm)Wavelength
(μm)Product Number22.00240101410.6ICC-BELZ070125.00352101810.6ICC-BELZ070231.00478.5102410.6ICC-BELZ070333.005105.5102610.6ICC-BELZ070438.006125102810.6ICC-BELZ070545.008150102910.6ICC-BELZ0706