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520/70 nm BrightLine® Two-photon emission filter

Part Number: FF01-520/70-25

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  • Your filter spectrum may differ slightly from the typical spectrum above, but is certified to meet the optical specifications noted below.
  • Note that the change in blocking at 1120 nm is due to a change in the detector on the measurement equipment; the filter meets all optical specifications noted below.
Semrock Optical Filter: FF01-520/70  FF01  520/70
520/70 nm BrightLine® Two-photon emission filter
Ultrahigh-performance multiphoton fluorescence filters that accommodate a wide range of fluorescence dyes. Designed to be a fixed component in any multiphoton or nonlinear (harmonic-generation) microscope, so that when desired individual, narrower bandpass filters can be added without having to worry about the near-IR blocking of these filters. The transmission bands of these short-pass emitters are so wide, they appear clear at normal incidence.
Part NumberSizePrice1Stock StatusQuantity
FF01-520/70-2525 mm x 3.5 mm$995In StockAdd To Cart

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Custom Sizing Limits:
Diameter Range: 5mm - 50.8mm
Rectangular Dimensions: 5mm - 50.8mm

Substrate thickness/tolerance as listed on Specifications tab.
Dimensional tolerances are ±0.1mm for unhoused parts.

For sizes outside the limits listed above, please contact customer service at 1-866-SEMROCK

1) US domestic pricing only. If you are ordering from outside the US, please contact your nearest regional distributor for the correct list price.
Optical Specifications
Transmission Band 1Tavg > 93% 485 – 555 nm
Center Wavelength 1520 nm
Guaranteed Minimum Bandwidth 170 nm
FWHM Bandwidth 1 (nominal)76.5 nm
Blocking Band 1ODavg > 5 300 – 474.5 nm
Blocking Band 2ODavg > 6 567.5 – 1200 nm

General Filter Specifications
Angle of Incidence0 ± 5 degrees
Cone Half-angle7 degrees
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.
Filter Effective Index1.88 Understanding ‘Effective Index of Refraction’ neff

Physical Filter Specifications (applies to standard sized parts; contact us regarding other sizes)
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
Substrate Thickness (unmounted)2.0 mm
Substrate Thickness Tolerance (unmounted)± 0.1 mm
OrientationOrientation does not affect performance; therefore there is no arrow on the ring to denote a preferred orientation

Tech Note
Cleaning Optical FiltersInstructions for cleaning hard coated optical filters
Filter ReliabilityCompares the performance and reliability of hard coated filters to traditional soft-coated filters and provides information about the testing standards for Semrock filters
Laser Damage ThresholdProvides information for calculating laser damage threshold for pulsed and continuous wave lasers
Working with Optical DensityTables to describe the relationship between OD and transmission with tips for quickly calculating OD
BrightLine Multiphoton Fluorescence FiltersDescribes how multiphoton microscopy works and how optical filters for multiphoton fluorescence differ from traditional fluorescence filters.
Journal Article
Optical Filters for Multiphoton MicroscopyCraig Hodgson, PhD, and Turan Erdogan, PhD, Semrock, Inc., BioPhotonics, November 2006
Describes how multiphoton microscopy works, several current applications and how optical filters for multiphoton fluorescence differ from traditional fluorescence filters
Multiphoton MicroscopyAn overview of multiphoton microscopy, including solutions from Semrock and additional learning resources.

520/70 FF01-520/70 FF01 Bandpass Single-Band FF01-520/70-25

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