Changchun Long Ze Precision Optics Co., Ltd

Plano-Concave Lenses Plano Concave Lens, 40mm Dia. x -63.5mm FL, AR Coated R<0.25%@780nm, N-BK7 Lens The Plano-Concave Lens have one flat surface and one concave surface. They have a negative focal length and are used to diverge incoming light, or to increase focal length in an existing optical system. They can be used in beam expanders and projection systems.More details about Plano-Concave Lenses，Optical Lenses，optical Coatings， Prism，Optical Mirror，Precision Optics，please contact us. CLZ Precision Optics specialize in manufacturing optical components from customer supplied designs, including a wide variety of Plano Concave Lenses. We can provide Featuring surface accuracy to less than 0.2 fringe measured at 633nm and finishes to 20-10 scratch-dig per MIL-PRF 13830, the material are fabricated from quartz, optical glass, silicon, etc. and the sizes up to 200mm diameter. Part Number LPC-63.5|40 Diameter (mm): 40 Diameter Tolerance (mm): ±0.025 Effective Focal Length EFL (mm): -63.5 Back Focal Length BFL (mm): Substrate: N-BK7 or Equivalent Surface Quality: 40-20 Power (P-V) @ 632.8nm: 1.5λ Irregularity (P-V) @ 632.8nm: 0.5 Waves Focal Length Tolerance (%): ±1% Centering (arcmin): < 1 minutes Center Thickness CT (mm): 2 Center Thickness Tolerance (mm): ±0.25 Edge Thickness ET (mm): 8.4 Clear Aperture CA (mm): 36