25mm Dia. x 45mm FL, NIR I Coated, Achromatic Lens

Product Details Designed to Give Increased Resolution and Smaller Spot Sizes for NIR Wavelengths (750-1100nm) Decreased Spherical Aberration for Monochromatic Sources Out to 2μm Broadband AR Coating has <1% Reflectivity Between 750–1550nm TECHSPEC Near-IR (NIR) Achromatic Lenses are designed to provide the smallest spot size possible for polychromatic light between 750 and 1100nm. By utilizing our NIR doublets instead of standard doublets designed for the visible, the RMS spot diameter can be reduced from 43μm to 22.5μm, for example, when using polychromatic light. Spot size will be smaller when focusing on monochromatic sources. TECHSPEC Near-IR (NIR) Achromatic Lenses also reduce spherical aberration and perform superior when used with a monochromatic source up to 2μm in wavelength. Typical applications for these doublets include imaging lenses for the near infrared, focusing and expanding of NIR lasers, and focusing/collimating lenses for fiber optics and NIR LEDs. Specifications General Type: Achromatic Lens Physical & Mechanical Properties Diameter (mm): 25.00 +0.0/-0.025 Center Thickness CT (mm): 13.00 ±0.20 Center Thickness CT 1 (mm): 9.00 ±0.10 Center Thickness CT 2 (mm): 4.00 ±0.10 Edge Thickness ET (mm): 9.59 Clear Aperture CA (mm): 24.00 Centering (arcmin): <1 Bevel: Protective as needed Optical Properties Effective Focal Length EFL (mm): 45.00 Focal Length Tolerance (%): ±1 Focal Length Specification Wavelength (nm): 880.00 Back Focal Length BFL (mm): 37.80 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More N-LAK22 / N-SF6 f/#: 1.8 Numerical Aperture NA: 0.28 Coating: NIR I (600-1050nm) Coating Specification: R avg ≤0.5% @ 600 - 1050nm Wavelength Range (nm): 600 - 1050 Radius R 1 (mm): 29.01 Radius R 2 (mm): -25.53 Radius R 3 (mm): -132.92 Surface Quality: 40-20 Power (P-V) @ 632.8nm: 1.5λ Irregularity (P-V) @ 632.8nm: λ/4 Regulatory Compliance Certificate of Conformance: View × Reach 240: Compliant ×