12mm Diameter x -48 FL, NIR II Coated, Plano-Concave Lens

Product Details AR Coated to Provide <0.7% Reflectance per Surface for 750 - 1550nm Designed for 0° Angle of Incidence Various Coating Options: Uncoated , VIS-EXT , MgF 2 , VIS 0° , VIS-NIR , YAG-BBAR , and NIR I TECHSPEC NIR II Coated Plano-Concave (PCV) Lenses are designed to bend parallel input rays to diverge from one another on the lens’s output side 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 NIR II Coated Plano-Concave (PCV) Lenses offer optimal performance in the 750 to 1550nm range. These lenses are also available Uncoated , VIS-EXT , MgF 2 , VIS 0° , VIS-NIR , YAG-BBAR , or with NIR I AR coating options. Specifications General Type: Plano-Concave Lens Physical & Mechanical Properties Diameter (mm): 12.00 +0.0/-0.025 Center Thickness CT (mm): 3.50 ±0.05 Edge Thickness ET (mm): 4.12 Centering (arcmin): <1 Clear Aperture CA (mm): 11.00 Optical Properties Effective Focal Length EFL (mm): -48.00 Focal Length Specification Wavelength (nm): 587.6 Back Focal Length BFL (mm): -50.31 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More N-BK7 f/#: 4.00 Coating: NIR II (750-1550nm) Coating Specification: R abs ≤1.5% @ 750 - 800nm R abs ≤1.0% @ 800 - 1550nm R avg ≤0.7% @ 750 - 1550nm Wavelength Range (nm): 750 - 1550 Surface Quality: 40-20 Power (P-V) @ 632.8nm: 1.5λ Irregularity (P-V) @ 632.8nm: λ/4 Focal Length Tolerance (%): ±1.00 Radius R 1 (mm): -24.81 Damage Threshold, Reference: Damage threshold for optical components varies by substrate material and coating. Click here to learn more about this specification. 8 J/cm 2 @ 1064nm, 10ns Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 253: Compliant ×