Lasers are collimated [0], not focused. They might be focusing it to maximize light intensity at the required spot. [0] https://en.wikipedia.org/wiki/Collimate

Lasers are collimated [0], not focused. They might be focusing it to maximize light intensity at the required spot. [0] https://en.wikipedia.org/wiki/Collimated_beam https://en.wikipedia.org/wiki/Collimated_beam