hi everybody i can't understand how this machines work...
here are some videos of the machines working and the finished products...
well here is my question...
you have a laser beam traveling in to the crystal you can do this and move the laser left and right easily but...
when the laser beam is travelling through the crystal how can you make the burn spot at the right altitude???
how can they stop the travelling laser beam in a determinate altitude to draw a burned point in the crystal???
because if they don't stop it with something it will keep on travelling farder than the crystal or will burn the crystal when the laser beam touch the crystal...
i attached a self made schematic drawing of two laser beams travelling one keeps on travelling through the crystal and the other stops in a determinate altitude and burn one of the points that composes the photo...
i expect that someone can explain this to me or recommend me some bibliography or something because i'm really intrigued about it...
thank you all for your time...