Thorlabs FES0700 Shorptass Filter

Thorlabs FES0700 Shorptass Filter

General Overview

• Part Number: FES0700

• Diameter: 25.4 mm (1″) with a clear aperture of ~21.1 mm

• Mounting: Housed in a black anodized aluminum ring, clearly marked with the direction arrow

Optical Performance

• Cut-off Wavelength: 700 nm ±3 nm (@50% transmission)

• Transmission Range:

  • Efficient transmission (~>90%) from ~400 to ~690 nm

  • Peak transmission ≈80% in the visible range (550–1000 nm typical)

• Rejection (Blocking) Region:

  • From ~711 to 1200 nm with optical density (OD) >5 (i.e., attenuation to <0.001%)

Construction & Quality

• Substrate: UV fused silica or soda‑lime, 3.5 mm thick

• Coating: Hard‑coated dielectric—durable and cleanable

• Surface Quality: Scratch‑dig 40‑20

• Wavefront Error: λ/4 at 632.8 nm