Cross-pointer for a DIY CO2 laser cutter

The cross-mark pointer was designed for a DIY 40W CO2 laser cutter (https://www.facebook.com/groups/271589873026356/). The cross mark can help positioning and alignment of objects to be cut.

Two line-laser-diode-pointer modules are used to generate the cross mark. The pointer module is 9 mm in outer diameter and its spreading angle of the light sheet is 90 degrees. The projected light line is too thick, so a slot mask is used for shading.

https://youtu.be/h_14anI-YwA