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665 nm edge BrightLine® multiphoton single-edge dichroic beamsplitter

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Semrock offers a wide range of dichroic beamsplitters optimized for pulsed lasers used in multiphoton applications. These multiphoton dichroics have low GDD that helps minimize temporal pulse broadening of transmitted laser beams while exhibiting steep edges with very high and flat reflection and transmission bands.

These are ideal solutions for femtosecond pulsed lasers such as Ti:Sapphire (& OPO coupled), neodymium- and ytterbium-doped fiber and glass lasers, enabling deep tissue imaging with improved constrast.

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 > 93% 680 – 1600 nm
Reflection Band Ravg > 98% 350 – 650 nm
Edge Wavelength 665 nm
General Specifications
Angle of Incidence 45 ± 1.5 °
Cone Half-angle 2 °
Steepness Standard
Filter Effective Index 1.77 Understanding ‘Effective Index of Refraction’ neff
Optical Damage Rating Testing has proven to show no signs of degradation when exposed to at least 6.0 W of power from an unfiltered xenon arc lamp over a 25 mm diameter (corresponding to 1.2 W/cm²) for over 500 hrs.
Flatness / RWE Classification Standard Epi-fluorescence
Reflected Wavefront Error >> 6λ P-V RWE @ 632.8
Physical Specifications (for standard parts – please contact us for custom sizes)
Mounted / Unmounted Unmounted
Shape Rectangular
Size 25.2 x 35.6 x 1.1 mm
Transverse Dimensions, LxW 25.2 mm x 35.6 mm
Transverse Tolerance, Mounted ± 0.1 mm
Filter Thickness, Unmounted 1.05 mm
Filter Thickness Tolerance, Unmounted ± 0.05 mm
Clear Aperture ≥ 80% (elliptical)
Surface Quality (Scratch-Dig) 60-40
Substrate Thickness 1.05 mm
Substrate Type Low-autofluorescence optical quality glass
Orientation Reflective surface marked with part number – Orient in direction of incoming light


  • Size: 25.2 x 35.6 x 1.1 mm


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Optical Density

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Semrock Spectral Plot Info

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