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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

25.4mm Diameter x 300mm FL, 370-550nm Coated, Ultrafast Thin PCX Lens

Stock #11-681 3-4 days
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Diameter (mm):
25.40 +0.00/-0.10
Effective Focal Length EFL (mm):
300.35 @ 587.6nm
Back Focal Length BFL (mm):
BBAR (370-550nm)
Coating Specification:
R<0.5% @ 370 - 550nm
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Fused Silica (Corning 7980)
Surface Quality:
Power (P-V) @ 632.8nm:
Irregularity (P-V) @ 632.8nm:
Focal Length Tolerance (%):
Centering (arcmin):
Center Thickness CT (mm):
1.60 ±0.10
Edge Thickness ET (mm):
Radius R1 (mm):
Clear Aperture CA (mm):
Numerical Aperture NA:
Plano-Convex Lens
Protective bevel as needed
Wavelength Range (nm):
370 - 550
Angle of Incidence (°):
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/cm2 @ 355nm, 20ns, 20Hz

Regulatory Compliance

RoHS 2015:
Reach 219:
Certificate of Conformance:

Product Family Description

  • Ultra-Thin Center Thickness to Limit GDD
  • Low Loss Broadband IBS Anti-Reflection Coating
  • Ideal for Ultrafast and Laser Optics Applications
  • UV or IR Grade Fused Silica Substrates

TECHSPEC® Ultrafast Thin Plano-Convex Lenses are designed with an ultra-thin center thickness to provide a low group delay dispersion (GDD) for ultrafast laser pulses.TECHSPEC Ultrafast Thin Plano-Convex Lenses are ideal for collecting and focusing light from laser sources and their corresponding harmonics, including Ti:sapphire, Yb:YAG, and Nd:YAG, Holmium, and Thulium lasers. These thin PCX lenses are available in standard sizes with effective focal lengths from 50mm to 2000mm.

IR grade fused silica differs from UV grade fused silica by its reduced amount of OH- ions, resulting in higher transmission throughout the NIR spectrum and reduction of transmission in the UV spectrum.