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 and converted into the unit the field asks for.
Solve for
Inputs
Result
Live diagram
Drawn from the values above, redrawn as you type - the same physical schematic the mini-program shows.
