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643.5 nm RazorEdge Dichroic™ laser-flat beamsplitter

Part Number: LPD01-643RU-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.
Optical Specifications
SpecificationValue
Reflection Band 1Rabs > 94% 643.5 nm
Reflection Band 1 (p-pol)Rabs > 90% 643.5 nm
Reflection Band 1 (s-pol)Rabs > 98% 643.5 nm
Edge Wavelength 1647.3 nm
Transmission Band 1Tavg > 93% 651.9 – 997.4 nm

General Filter Specifications
SpecificationValue
Angle of Incidence45 degrees with a shift of 0.35%/degree (40 – 50 degrees)
Cone Half-angle0.5 degrees
Optical Damage Rating1 J/cm2 @ 532 nm (10 ns pulse width)
SteepnessUltra Steep
Laser Wavelength 1643.5 nm
Edge Steepness (%)0.5%
Edge Steepness (nm)3.2 nm
Edge Steepness (cm-1)77.4 cm-1
Transition Width (nm)6.4 nm
Transition Width (cm-1)154 cm-1
Flatness / RWE ClassificationLaser
Reflected Wavefront Error< 6λ P-V RWE @ 632.8 nm

Physical Filter Specifications (applies to standard sized parts; contact us regarding other sizes)
SpecificationValue
Transverse Dimensions (Diameter)25 mm
Transverse Tolerance± 0.1 mm
Clear Aperture≥ 80%
Scratch-Dig60-40
Substrate TypeFused Silica
Substrate Thickness (unmounted)2.0 mm
Substrate Thickness Tolerance (unmounted)± 0.1 mm
OrientationArrow on ring indicates preferred direction of propagation of light.

Tech Note
TopicDescription
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
Flatness of Dichroic BeamsplittersDescribes the impact of non-flat dichroic beamsplitters on microscope image fidelity
Measuring Light with Wavelengths & WavenumbersCompares units of wavelength to wavenumbers and provides formulas for calculating wavenumber shift
Laser Damage ThresholdProvides information for calculating laser damage threshold for pulsed and continuous wave lasers
Filter Types for Raman Spectroscopy ApplicationsCompares the performance of different combinations of LWP and SWP edge filters, notch and laser line filters for Raman applications
RazorEdge Filter LayoutsDescribes two different filter layouts that are commonly used in Raman applications
Journal Article
TopicDescription
Thin-Film Filters for Raman SpectroscopyTuran Erdogan, PhD, and Victor Mizrahi, PhD, Semrock Inc., Spectroscopy, December 2004
Describes the types and functions of filters commonly used in Raman spectroscopy
White Paper
TopicDescription
Flatness of Dichroic Beamsplitters Affects Focus and Image QualityAnalysis of how the radius of curvature of a dichroic filter affects focal plane shift, spot size and image fidelity in fluorescence microscopy.
Application
TopicDescription
Raman SpectroscopyAn overview of Raman spectroscopy, including solutions from Semrock and additional learning resources.

LPD01-643RU 643RU

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