Laser 2000

658 nm StopLine® single-notch filter

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Ideal for Raman spectroscopy, laser-based fluorescence instruments and biomedical laser systems, StopLine single-notch filters offer high transmission over ultrawide passbands (UV to 1600 nm). They offer deep laser-line blocking with OD > 6 for maximum laser rejection, and rejected light is reflected for best alignment and stray light control.

Note on spectral plots:
In the past, each shipment has included a spectral plot for every filter and every lot code in the shipment. In an effort to be more eco-friendly, we will no longer be including these plots with each shipment. If you require spectral plot data, please see here for more information.

Optical Specifications
Transmission BandTavg > 80% 350 – 400 nm
Tavg > 93% 400 – 628.2 nm
Tavg > 93% 687.8 – 1600 nm
Laser Wavelength658 nm
Notch Bandwidth27 nm (typical)
Blocking BandODabs > 6 658 nm

General Specifications
Angle of Incidence0 ± 5 °
Cone Half-angle5 °
Filter Effective Index2.21 Understanding 'Effective Index of Refraction' neff
Optical Damage Rating1 J/cm² @ 532 nm (10 ns pulse width)

Physical Specifications (for standard parts - please contact us for custom sizes)
Mounted / UnmountedMounted
Size25 x 3.5 mm
Transverse Dimensions, Diameter25 mm
Transverse Tolerance, Mounted+ 0.0 / - 0.1 mm
Filter Thickness, Mounted3.5 mm
Filter Thickness Tolerance, Mounted± 0.1 mm
Clear Aperture≥ 22 mm
Surface Quality (Scratch-Dig)60-40
Substrate Thickness2.0 mm
Substrate TypeFused Silica
OrientationArrow on ring indicates preferred direction of propagation of light


  • Size: 25 x 3.5 mm


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Optical Density

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Semrock Spectral Plot Info

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