Helium-neon laser 20429 series

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Perfect for classroom demonstrations, these gas lasers produce a high-quality Gaussian beam with high intensity for visible diffraction patterns from a distance. Caution, the power of these lasers makes them dangerous for the retina even in case of accidental exposure: mandatory use of laser safety glasses. - Polarization: random - Output diameter: 0.8mm - Power supply: separate HT (provided) - Divergence: 1.0 mRad - Dimensions: L 45cm Ø 4.5cm - End: smooth