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538/685 nm BrightLine® dual-band bandpass filter

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Individual multiband fluorescence bandpass filters that utilize Semrock’s patented single-substrate construction. These filters have extremely high transmission, steep and well-defined edges, and outstanding blocking between the passbands. All thin-film, hard-coated construction for unsurpassed performance and reliability.

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 BandBand 1: Tavg > 90% 513 – 563 nm
Band 2: Tavg > 90% 662.5 – 707.5 nm
Transmission WavelengthBand 1: 538 nm
Band 2: 685 nm
Transmission Wavelength Range662.5 - 707.5 nm
FWHM BandwidthBand 2: 51.4 nm
Band 1: 55.6 nm
Blocking BandODavg > 5 400 – 443 nm
ODavg > 6 443 – 493 nm
ODavg > 5 574 – 606.5 nm
ODavg > 6 606.5 – 641.5 nm
ODavg > 5 723 – 900 nm
ODavg > 2 900 – 1100 nm

General Specifications
Angle of Incidence0 ± 5 °
Cone Half-angle7 °
Filter Effective Index1.87 Understanding 'Effective Index of Refraction' neff
Optical Damage RatingTesting 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.

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 TypeLow-autofluorescence optical quality glass
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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