Laser Pointer Custom Lens Image

Was wondering if anyone has info on making a custom 'lens' for a laser pointer. Not sure what it's called, I just say lens [the piece responsible for making the laser beam into a star, crosshair,  or whatever]

Most laser pointers that come with shaped lens use a magnifying lens to increase the diameter of the beam before it goes through whatever kind of filter where the desired shape is cut so it is just smaller then the magnified beam.