488 nm RazorEdge Dichroic™ laser beamsplitter

Product Code Description Lead Time Price Quantity Buy / Get Quote
LPD02-488RU-25x36x2.0 488 nm RazorEdge Dichroic™ laser beamsplitter 1-2 weeks £835.00
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Angle of Incidence:

45 ° with a shift of <= 0.20%/° (35 – 55 °)

Clear Aperture:

≥ 80%

Cone Half-angle:


Edge Steepness:


Edge Steepness:

101.9 cm-1

Edge Steepness:

2.4 nm

Edge Wavelength:


Filter Effective Index:

2.45 Understanding 'Effective Index of Refraction' neff

Filter Thickness Tolerance, Mounted:

± 0.1mm

Filter Thickness, Mounted:


Flatness / RWE Classification:


Laser Wavelength:


Mounted / Unmounted:


Optical Damage Rating:

1 J/cm2 @ 532 nm (10 ns pulse width)


Reflective surface marked with part number – Orient in direction of incoming light

Product Type:

RazorEdge Dichroic Beamsplitter

Reflected Wavefront Error:

< 6λ P-V RWE @ 632.8

Reflection Band:

Rabs > 94% 488 nm

Reflection Band, p-pol:

Rabs > 90% 488 nm

Reflection Band, s-pol:

Rabs > 98% 488 nm

Semrock Filter Family:

RazorEdge® Raman Filters




25.2 x 35.6 x 2.0 mm


Ultra Steep

Substrate Type:

Fused Silica

Surface Quality (Scratch-Dig):


Transition Width:

203 cm-1

Transition Width:

4.9 nm

Transmission Band:

Tavg > 93% 494.3 – 756.4 nm

Transverse Tolerance, Mounted:

+ 0.0 / - 0.1 mm

Transverse Tolerance, Unmounted:

± 0.1 mm

Each beamsplitter reflects a standard laser line incident at 45° while efficiently passing the longer Raman-shifted wavelengths. The filters exhibit ultrasteep transitions from reflection to transmission, with a guaranteed transition width of < 1% of the laser wavelength for the U-grade version. 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 spetral plot data, please see here for more information.