9.0mm Dia. x -9 FL, YAG-BBAR, Plano-Concave Lens

Product Details Negative Focal Lengths for Beam Expansion or Light Projection Applications Optimized for R<0.25% at both 532nm and 1064nm AR Coated to Provide <1.0% Reflectance per Surface for 500 - 1100nm Various Coating Options: Uncoated , VIS-EXT , MgF 2 , VIS 0° , VIS-NIR , NIR I , NIR II , and 1064nm V-Coat TECHSPEC YAG-BBAR Coated Plano-Concave (PCV) Lenses are designed to bend parallel input rays to diverge from one another on the output side of the lens causing this lens to have a negative focal length. These lenses can be used for balancing aberrations created by other lenses within a system due to their negative spherical aberration. Plano-Concave (PCV) lenses are commonly used in a variety of applications including image reduction, beam expansion and telescopes. TECHSPEC YAG-BBAR Coated Plano-Concave (PCV) Lenses feature less than 0.25% reflection at common Nd:YAG laser wavelengths of 532nm and 1064nm. These lenses are also available Uncoated , VIS-EXT , MgF 2 , VIS 0° , VIS-NIR , NIR I , or with NIR II AR coating options. Specifications General Type: Plano-Concave Lens Physical & Mechanical Properties Diameter (mm): 9.00 Center Thickness CT (mm): 2.25 ±0.05 Edge Thickness ET (mm): 3.63 Centering (arcmin): <3 Clear Aperture CA (mm): 8.1 Bevel: Protective as needed Optical Properties Effective Focal Length EFL (mm): -9.00 Focal Length Specification Wavelength (nm): 587.6 Back Focal Length BFL (mm): -10.21 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More N-SF11 f/#: 1.00 Coating: YAG-BBAR (500-1100nm) Coating Specification: R abs <0.25% @ 532nm R abs <0.25% @ 1064nm R avg <1.0% @ 500 - 1100nm Wavelength Range (nm): 500 - 1100 Surface Quality: 40-20 Power (P-V) @ 632.8nm: 1.5λ Irregularity (P-V) @ 632.8nm: λ/4 Focal Length Tolerance (%): ±1 Radius R 1 (mm): -7.07 Numerical Aperture NA: 0.50 Damage Threshold, By Design: Damage threshold for optical components varies by substrate material and coating. Click here to learn more about this specification. 5 J/cm 2 @ 532nm, 10ns Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 235: Compliant ×