Thorlabs FES0700 Shorptass Filter
General Overview
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Part Number: FES0700
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Diameter: 25.4 mm (1″) with a clear aperture of ~21.1 mm
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Mounting: Housed in a black anodized aluminum ring, clearly marked with the direction arrow
Optical Performance
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Cut-off Wavelength: 700 nm ±3 nm (@50% transmission)
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Transmission Range:
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Efficient transmission (~>90%) from ~400 to ~690 nm
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Peak transmission ≈80% in the visible range (550–1000 nm typical)
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Rejection (Blocking) Region:
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From ~711 to 1200 nm with optical density (OD) >5 (i.e., attenuation to <0.001%)
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Construction & Quality
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Substrate: UV fused silica or soda‑lime, 3.5 mm thick
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Coating: Hard‑coated dielectric—durable and cleanable
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Surface Quality: Scratch‑dig 40‑20
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Wavefront Error: λ/4 at 632.8 nm



