25mm Dia., 0.25 NA, Uncoated 1550nm NIR Aspheric Lens

Product Details Designed at 1550nm Precision Grade Aspheric Surface Uncoated and <0.25% Reflectance V-Coat Options TECHSPEC 1550nm Precision Near-Infrared (NIR) Aspheric Lenses are designed at 1550nm to eliminate spherical aberration in the near-infrared. 1550nm lasers are commonly used in telecom, LiDAR, and other applications requiring eye-safe design features. Manufactured from S-TIH6 or N-SF6 substrates and polished through a computer numerical controlled (CNC) process, these aspheric lenses achieve high precision performance across the NIR spectrum. Featuring a 0.4λ RMS aspheric figure error, these lenses are ideal for applications that require spherical aberration correction, including imaging and laser focusing applications. TECHSPEC 1550nm Precision Near-Infrared (NIR) Aspheric Lenses are available with low numerical aperture designs for applications that require beam shape to be maintained as well as high numerical aperture designs for light-gathering applications. For custom designed CNC polished aspheric lenses, please contact us. Specifications General Type: Aspheric Lens Physical & Mechanical Properties Diameter (mm): 25.00 +0.0/-0.025 Center Thickness CT (mm): 8.50 ±0.1 Edge Thickness ET (mm): 6.43 Clear Aperture CA (mm): 22.5 Centering (arcmin): <2.5 Shape of Back Surface: Plano Bevel: Protective as needed Optical Properties Effective Focal Length EFL (mm): 50.00 @ 1550nm Back Focal Length BFL (mm): 42.65 @ 587.6nm Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More N-SF6 f/#: 2 Numerical Aperture NA: 0.25 Coating: Uncoated Design Wavelength DWL (nm): 1550 Aspheric Design Wavelength (nm): 1550 Surface Quality: 40-20 Asphere Figure Error, @ 632.8nm: 0.4λ RMS and 2λ PV Conjugate Distance: Infinite Power (diopters): 20.00 Regulatory Compliance Certificate of Conformance: View ×