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20mm Dia. x -20mm FL, Uncoated, Double-Concave Lens

20mm Dia. UV-Enhanced Aluminum Coated, λ/10 ZERODUR Mirror

20mm Dia. Ultra-Thin NIR II Coated, Fused Silica Window

20mm Dia. Protected Gold Coated, Reflective Diffuser

20mm Dia. Linear Plastic Polarizer (XP42-200)

20mm Dia. High-Temperature Linear Polarizing Film (XP40HT-18)

20mm Dia. Broadband Hybrid Diffuser

20mm Dia. 400 – 750nm Broadband λ/10 Mirror

20mm Dia. 2mm Thick VIS-NIR Coated, 1λ Fused Silica Window

20mm Dia. 2mm Thick Uncoated, 1λ Fused Silica Window

20mm Dia. 1mm Thick YAG-BBAR Coated, 1λ Fused Silica Window

20mm Dia. 1mm Thick UV-AR Coated, 1λ Fused Silica Window

20mm Dia. 1064nm Laser V-Coat, λ/20 Fused Silica Window

20mm Dia x 40mm Focal Length, Spherical Mirror

20mm Dia x 16mm FL, NIR I Coated, Molded Aspheric Condenser Lens

20mm Dia Protected Gold, λ/20 Mirror

20.0mm Diameter x 80.0mm FL, 785nm V-Coat, PCX Lens

20.0mm Diameter x 80.0mm FL, 1064nm V-Coat, PCX Lens

20.0mm Diameter x 70.0mm FL, 1550nm V-Coat, PCX Lens

20.0mm Diameter x 60.0mm FL, 405nm V-Coat, PCX Lens

20.0mm Diameter x 50.0mm FL, 532nm V-Coat, PCX Lens

20.0mm Diameter x 40.0mm FL, 633nm V-Coat, PCX Lens

20.0mm Diameter x 35.0mm FL, 785nm V-Coat, PCX Lens

20.0mm Diameter x 35.0mm FL, 1064nm V-Coat, PCX Lens