25mm Dia 0.42 NA, 355nm V-Coat, Aspheric Lens

Product Details Designed and Coated for Nd:YAG Laser Wavelengths High Laser Damage Thresholds Low Coefficient of Thermal Expansion TECHSPEC Laser Line Coated Aspheric Lenses are designed to maximize performance in high power Nd:YAG laser applications. The aspheric designs minimize spherical aberration to decrease laser spot size and maintain high power per area. Additionally, TECHSPEC Laser Line Coated Aspheric Lenses feature high performance coatings that have been optimized for the most popular Nd:YAG laser wavelengths and a high damage threshold, UV fused silica substrate that is highly resistant to thermal expansion. Specifications General Type: Aspheric Lens Physical & Mechanical Properties Diameter (mm): 25.00 +0.0/-0.1 Center Thickness CT (mm): 8.50 ±0.1 Edge Thickness ET (mm): 2.21 Clear Aperture CA (mm): 22.5 Centering (arcmin): ≤5 Shape of Back Surface: Plano Bevel: Protective as needed Optical Properties Effective Focal Length EFL (mm): 30.00 @ 587.6nm Back Focal Length BFL (mm): 24.17 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Fused Silica (Corning 7980) f/#: 1.2 Numerical Aperture NA: 0.42 Abbe Number (v d ): 67.8 Index of Refraction (n d ): 1.458 Coating: Laser V-Coat (355nm) Coating Specification: R abs <0.25% @ 355nm Design Wavelength DWL (nm): 355 Focal Length Specification Wavelength (nm): 587.6 Aspheric Design Wavelength (nm): 355 Surface Quality: 60-40 Asphere Figure Error, RMS @ 632.8nm: 1.2λ Damage Threshold, By Design: Damage threshold for optical components varies by substrate material and coating. Click here to learn more about this specification. 7.5 J/cm 2 @ 355nm, 20ns, 20Hz Conjugate Distance: Infinite Power (diopters): 33.33 Material Properties Coefficient of Thermal Expansion CTE (10 -6 /°C): 0.52 Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 235: Compliant ×