Beam & Optics
Spot Size vs Distance
Beam size at a given distance, from the divergence angle.
W(z) ≈ W₀ + 2 · z · tan(θ/2)
Fill the inputs from a real part
Every number is read from that part's datasheet entry: peak power and pulse energy as rated, pulse width at the part's rated maximum.
Solve for
Inputs
Result
Live diagram
Drawn from the values above, redrawn as you type - the same physical schematic the mini-program shows.