Laser 2000
Home > Products > Light Delivery & Control > Microscopy Filters > Individual Filters > Edge Filters > 224 nm RazorEdge® ultrasteep long-pass edge filter

224 nm RazorEdge® ultrasteep long-pass edge filter

Semrock Logo

RazorEdge filters allow you to see the weakest signals closer to the laser line, especially for Raman spectroscopy applications. With their deep laser-line blocking, ultrawide and low-ripple passbands, hard-coated reliability, and high laser damage threshold, they offer lasting performance and value.

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 > 90% 235 – 505.9 nm
Laser Wavelength224.3 nm
Edge Wavelength235.6 nm
Blocking BandODavg > 6 202 – 224.3 nm (typical)
ODabs > 6 224.3 nm
Transition Width10.1 nm
1920 cm-1
Edge Steepness1424.2 cm-1
7.4 nm

General Specifications
Angle of Incidence0 ± 2 °
Cone Half-angle5 °
Filter Effective Index3.2 Understanding 'Effective Index of Refraction' neff
Optical Damage Rating0.5 J/cm² @ 266 nm (10 ns pulse width), 1 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
OrientationArrows on ring indicates preferred direction of propagation of light


  • Size: 25 x 3.5 mm


Loading chart data...

Optical Density

Loading chart data...

Semrock Spectral Plot Info

Request a Demo


Ask the Expert

If you’re interested in the products shown here, or have questions about something you can’t find on our website, please get in touch through the form below.

Our knowledgeable sales team will be happy to help. We can normally source exactly what you need, or work with you to come up with custom solutions.

Alternatively, just call +44 (0) 1933 461 666 and ask to speak to the Photonics team.