Thorlabs AC508-1000-B Achromatic Doublet

Key Specifications

• Type: Achromatic doublet (cemented)

• Coating / AR Range: 650 – 1050 nm

• Diameter: 50.8 mm (2″)

• Focal Length (EFL): 1000 mm, with ±1% tolerance

• Center Thickness: ~2.8 to 4.2 mm

• Edge Thickness: ~6.4 mm

• Materials: N-BAF10 and N-SF10 glass

• Surface Quality: 40-20 scratch-dig

• Surface Accuracy (PV): λ/4 at 632.8 nm

• Centration Error: < 3 arcmin

• Clear Aperture: > 90% of diameter

• Damage Threshold:

  • Pulsed: 5.0 J/cm² (810 nm, 10 ns, 10 Hz)

  • CW: 1000 W/cm² (1070 nm, ~0.97 mm beam)

• Operating Temperature: –40 °C to +85 °C