Beam expander

Imagine you have a tiny laser beam that shoots out of a machine. It's small and skinny, like a pencil.

Now, imagine you want that beam to get bigger so you can see it better or use it to do something cool.

So, you use a special thing called a beam expander.

The beam expander is like a special lens that you put in front of the laser beam. It helps to spread the light out and make it wider.

It's kind of like when you look through binoculars and you can adjust them to make things look closer or farther away. But instead of making things look closer, the beam expander makes the laser beam look wider.

So now, instead of a small, skinny beam, you have a wide beam that can do more things.

That's the magic of a beam expander!