BS EN ISO 11146-1. Lasers and laser-related equipment. Test methods for laser beam widths, divergence angles and beam propagation ratios - Part 1. Stigmatic and simple astigmatic beams

BS EN ISO 11146-1. Lasers and laser-related equipment. Test methods for laser beam widths, divergence angles and beam propagation ratios - Part 1. Stigmatic and simple astigmatic beams

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