9.0mm Diameter x -18 FL, MgF 2 Coated, Plano-Concave Lens

Product Details AR Coated to Provide <1.75% Reflectance per Surface for 400 - 700nm Designed for 0° Angle of Incidence Various Coating Options: Uncoated , VIS-EXT , VIS 0° , VIS-NIR , YAG-BBAR , NIR I , and NIR II TECHSPEC MgF 2 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 MgF 2 Coated Plano-Concave (PCV) Lenses are ideal for broadband applications. These lenses are also available Uncoated , VIS-EXT , VIS 0° , VIS-NIR , YAG-BBAR , NIR I , or with NIR II AR coating options. Specifications General Type: Plano-Concave Lens Physical & Mechanical Properties Diameter (mm): 9.00 +0.0/-0.025 Center Thickness CT (mm): 2.25 ±0.05 Edge Thickness ET (mm): 2.89 Centering (arcmin): <1 Clear Aperture CA (mm): 8.1 Bevel: Protective as needed Optical Properties Effective Focal Length EFL (mm): -18.00 Focal Length Specification Wavelength (nm): 587.6 Back Focal Length BFL (mm): -19.26 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More N-SF11 f/#: 2.00 Coating: MgF 2 (400-700nm) Coating Specification: R avg ≤1.75% @ 400 - 700nm Wavelength Range (nm): 400 - 700 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): -14.12 Numerical Aperture NA: 0.25 Damage Threshold, By Design: Damage threshold for optical components varies by substrate material and coating. Click here to learn more about this specification. 10 J/cm 2 @ 532nm, 10ns Regulatory Compliance RoHS 2015: Compliant × Reach 219: Compliant × Certificate of Conformance: View ×