Laser 2000
Home > Products > Light Delivery & Control > Microscopy Filters > Individual Filters > Dichroic Beamsplitter Filters > 427 nm edge LaserMUX™ single-edge laser dichroic beamsplitter

427 nm edge LaserMUX™ single-edge laser dichroic beamsplitter

Semrock Logo

LaserMUX filters are designed to efficiently multiplex or demultiplex (combine or separate) laser beams at a 45° angle of incidence. These ultralow-autofluorescence filters are ideally suited for multi-laser fluorescence imaging and measurement applications such as laser microscopy and flow cytometry. This laser dichroic beamsplitter is optimized for reflecting laser beams up to 2.5 mm in diameter while minimizing RWE.

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 Band Tavg > 95% 439.0 – 647.1 nm
Transmission Band, p-pol Tabs > 95% for transmitted laser wavelengths
Transmission Band, s-pol Tabs > 94% for transmitted laser wavelengths
Reflection Band Ravg > 98% 372.0 – 415.0 nm
Reflection Band, p-pol Rabs > 96% for laser wavelengths
Reflection Band, s-pol Rabs > 99% for laser wavelengths
Laser Wavelength 375 nm ± 3
405 nm +10/-5
Edge Wavelength 427 nm
Transition Width 5.8%
General Specifications
Angle of Incidence 45 ° with a shift of 0.35%/° (40 – 50 °)
Cone Half-angle 0 °
Steepness Standard
Transmitted Laser Wavelengths 440 +3/-1 nm
457.9 nm
473 +5/-0 nm
488 +3/-2 nm
514.5 nm
515 nm
532 nm
543.5 nm
561.4 nm
568.2 nm
594.1 nm
632.8 nm
635 +7/-0 nm
647.1 nm
Filter Effective Index 1.82 Understanding ‘Effective Index of Refraction’ neff
Optical Damage Rating 1 J/cm² @ 532 nm (10 ns pulse width)
Flatness / RWE Classification Laser
Reflected Wavefront Error < 6λ P-V RWE @ 632.8
Physical Specifications (for standard parts – please contact us for custom sizes)
Mounted / Unmounted Mounted
Shape Round
Size 25 x 3.5 mm
Transverse Dimensions, Diameter 25 mm
Transverse Tolerance, Mounted + 0.0 / – 0.1 mm
Filter Thickness, Mounted 3.5 mm
Filter Thickness Tolerance, Mounted ± 0.1 mm
Clear Aperture ≥ 22 mm
Surface Quality (Scratch-Dig) 60-40
Substrate Thickness 2.0 mm
Substrate Type Low-autofluorescence optical quality glass
Orientation For optimal filter performance, when using the filter as a:
• MUX: Arrow points toward outgoing transmitted & combined laser beams
• DEMUX: Arrow points toward incoming combined beams and outgoing reflected beam


  • 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.