A three-lens system using a rotatable cylindrical lens pair converts astigmatic elliptical Gaussian beams into circular Gaussian beams, with a closed-form condition for the optimal rotation angle.
Deastigmatism, circularization, and focusing of a laser diode beam using a single biconvex microlens,
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Correcting astigmatism and ellipticity in Gaussian beams using a cylindrical lens pair with tunable focal lengths
A three-lens system using a rotatable cylindrical lens pair converts astigmatic elliptical Gaussian beams into circular Gaussian beams, with a closed-form condition for the optimal rotation angle.