{"inputs":{"wavelengthNm":632.8,"waistMm":0.5,"distanceM":10,"focalLengthMm":null},"result":{"wavelengthNm":632.8,"waistMm":0.5,"rayleighM":1.241147540135032,"divergenceMrad":0.40285299195420543,"depthOfFocusM":2.482295080270064,"atDistance":{"distanceM":10,"afterLens":false,"radiusMm":4.059440024516376,"curvatureM":10.154044721638325},"focus":null},"provenance":{"method":"Complex beam parameter q propagated with ABCD matrices: q0 = i*pi*w0^2/lambda at the waist, free space [[1,d],[0,1]], thin lens [[1,0],[-1/f,1]]. The radius comes from Im(1/q) = -lambda/(pi*w^2) and the focused waist sits where Re(q) = 0. Ideal TEM00 beam, M^2 = 1, paraxial, in vacuum or air (wavelength as given). Checked against the closed-form Siegman results in the site test suite. Pure mathematics - nothing is fetched and nothing is recalled.","canonicalUrl":"https://makerportal.ai/lab/gaussian-beam-calculator"},"license":"free-with-attribution"}