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20mm Dia., 2mm Thick, Uncoated, Magnesium Fluoride Window

20mm Dia., Vacuum UV (VUV) Mirror

20mm Dia. x 30mm FL, MgF 2 Coated, Plano-Convex Lens

20mm Dia. x 40mm FL, MgF 2 Coated, Plano-Convex Lens

20mm Dia., 0.50 Numerical Aperture NIR Coated, Aspheric Lens

20mm Dia., 0.66 Numerical Aperture VIS Coated, Aspheric Lens

20mm Dia., 0.50 Numerical Aperture VIS Coated, Aspheric Lens

20mm Dia., 0.66 Numerical Aperture NIR Coated, Aspheric Lens

20mm Dia., 1mm Thick, NIR I Coated λ/4 N-BK7 Window

20mm Diameter, 633nm V-Coat, λ/4 N-BK7 Window

20mm Dia. x 25mm FL, MgF 2 Coated, Achromatic Doublet Lens

20mm Dia. x 35mm FL, MgF 2 Coated, Achromatic Doublet Lens

20mm Diameter, 1064nm V-Coat, λ/4 N-BK7 Window

20mm Diameter, 785nm V-Coat, λ/4 N-BK7 Window

20mm Dia. x 50mm FL, MgF 2 Coated, Achromatic Doublet Lens

20mm Dia. x 60mm FL, MgF 2 Coated, Achromatic Doublet Lens

20mm Dia., 1mm Thick, VIS 0° Coated λ/4 N-BK7 Window

20mm Dia., 2mm Thick, VIS 0° Coated λ/4 N-BK7 Window

20mm Dia., 3mm Thick, NIR II Coated λ/4 N-BK7 Window

20mm Diameter, 1550nm V-Coat, λ/4 N-BK7 Window

20mm Diameter, 405nm V-Coat, λ/4 N-BK7 Window

20mm Diameter, 980nm V-Coat, λ/4 N-BK7 Window

20mm Dia. x 30mm FL, MgF 2 Coated, Achromatic Doublet Lens

20mm Dia. x 40mm FL, MgF 2 Coated, Achromatic Doublet Lens