Compared to an offensive laser cannon, a defensive laser cannon has much smaller power, mass, and volume.
The overall structure of a laser cannon resembles a telescope, with an outer barrel and precise optical components inside.
The barrel diameter of a precision laser cannon can reach up to 10 centimeters, with a length of several meters. However, for a defensive laser cannon, the maximum barrel diameter is only 1.5 centimeters, and the length is only about 30 centimeters.
Its area of expertise is also completely different from that of an offensive laser cannon.
The divergence angle of an offensive laser cannon is extremely small, allowing it to attack relatively distant targets. A defensive laser cannon, on the other hand, does not require a high divergence angle because its targets are usually close, having already breached the defensive electromagnetic cannon's perimeter, and are only tens of kilometers or even hundreds of meters away from the spaceship.
