6mm Dia. x -9mm FL, VIS-EXT Coated, Double-Concave Lens

Product Details AR Coated to Provide <0.5% Reflectance per Surface for 350 - 700nm Designed for 0° Angle of Incidence Precision Diameter and Centration Tolerances Allow for Easy OEM Integration Additional AR Coating Options Available: Uncoated , MgF 2 , VIS 0° , VIS-NIR , NIR I , and NIR II TECHSPEC VIS-EXT Coated Double-Concave (DCV) Lenses are designed to have two inward curved surfaces and a negative focal length similar to Plano-Concave (PCV) lenses. These lenses can be used for balancing aberrations created by other lenses within a system due to their negative spherical aberration. Plano-Concave (DCV) lenses are commonly used in a variety of applications including image reduction, beam expansion and telescopes. TECHSPEC VIS-EXT Coated Plano-Concave (DCV) Lenses offer optimal performance in the 350nm to 700nm range. These lenses are also available Uncoated , MgF 2 , VIS 0° , VIS-NIR , NIR I , or with NIR II AR coating options. Specifications General Type: Double-Concave Lens Physical & Mechanical Properties Diameter (mm): 6.00 +0.0/-0.025 Center Thickness CT (mm): 1.00 ±0.05 Edge Thickness ET (mm): 1.79 Centering (arcmin): <3 Clear Aperture CA (mm): 5.4 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): -9.32 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More N-BK7 f/#: 1.5 Coating: VIS-EXT (350-700nm) Coating Specification: R avg ≤0.4% @ 425 - 675nm Wavelength Range (nm): 350 - 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 =-R 2 (mm): -9.47 Numerical Aperture NA: 0.33 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 ×