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    Optical Density OD
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    Transmission Wavelength (nm)

    Longpass Edge and Dichroic Filters

    Longpass Edge and Dichroic Filters are designed to transmit wavelengths greater than the cut-on wavelength of the filter. Longpass Edge and Dichroic Filters are commonly used to isolate portions of the spectrum in a variety of industrial or life sciences applications including microscopy or fluorescence instrumentation. Longpass Filters are typically designed for a 0° Angle of Incidence, whereas Longpass Dichroic Filters are designed for use at a 45° Angle of Incidence. Longpass Edge and Dichroic Filters can be used with Shortpass Edge and Dichroic Filters to create custom bandpass filters. Certain Longpass Edge Filters can also be used as cold mirrors to minimize the heat buildup often caused by infrared radiation.

    Edmund Optics offers a wide variety of Longpass Edge and Dichroic Filters for performance in the ultraviolet, visible, or infrared wavelengths. Longpass Edge and Dichroic Filters are available in a range of optical densities. Higher optical densities offer increased blocking capability. TECHSPEC High Performance OD 4 Longpass Filters offer high blocking with superior transmission. TECHSPEC Dichroic Longpass Filters feature hard coatings for increased durability, while offering high performance for use in fluorescence applications or as spectral beamsplitters. Longpass Edge Filter kits containing some of Edmund Optics’ most popular Longpass Edge Filters are also available.

    TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

    High Performance OD 4 Longpass Filters
    • Cut-On Slope <1%
    • Rejection OD ≥ 4.0
    • ≥91% Transmission in Pass Band
    TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

    OD 4 High Performance Shortpass and Longpass Filter Kits
    • Precision Cut-On and Cut-Off Wavelengths
    • OD 4 Shortpass or OD 4 Longpass Configurations
    • Ideal for Lab Integration
    TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

    OD 2 Longpass Filters
    • Sharp Cut-On Wavelength
    • High Rejection/Transmission Efficiency
    • Precision Fused Silica Substrate
    TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

    OD 2 Longpass Filter Kits
    • Sharp Cut-on Wavelength
    • High Rejection / Transmission Efficiency
    • Multiple Diameters Available
    • Shortpass Filter Kits Also Available
    TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

    Dichroic Longpass Filters
    • Ideal for Fluorescence or Multispectral Imaging
    • Sharp Cut-On Wavelength
    • Broad Transmission and Reflection Ranges
    TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

    High Performance Fluorescence Dichroic Filters
    • Improved Flatness, Transmitted Wavefront, and Surface Quality
    • Ideal for Fluorescence Microscopy or High Magnification Imaging Applications
    • Most Popular Cut-On Wavelengths of Fluorescence and Longpass Dichroic Filters
    TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

    Fluorescence Dichroic Filters
    • Ideal for Fluorescence or Multispectral Imaging
    • Sharp Transition from Reflection to Transmission
    • Extended Reflection and Transmission Bands
    TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

    Dichroic Laser Beam Combiners
    • Polarization Insensitive
    • Hard Sputtered Coating
    • Multiple Sizes Available
    TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
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    Nd:YAG Harmonic Separators
    • Used to Separate Nd:YAG Harmonic Wavelengths
    • Beamsplitter Coating Features >95% Transmission
    • λ/10 Fused Silica Substrate

    Infrared (IR) Longpass Filters
    • Coated on Silicon or Germanium Substrates
    • Ideal for Isolating Broad Spectral Regions
    • Durable, First-Surface Coatings

    Longpass Glass Color Filters
    • UV, VIS and IR Pass Ranges
    • VIS Can Be Used for Color Bandpass
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    Ultra-Thin Longpass Filters
    • Ultra-Thin, Flexible Substrate
    • Sharp Cut-On Wavelength Designs
    • Extruded Thin Film, Insensitive to Scratches
    TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

    SWIR Longpass Filters
    • Block Visible Wavelengths
    • Ideal for Machine Vision Applications
    • Can Be Used as Cold Mirrors
    • Additional Longpass Edge Filters Available
    TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

    High Performance Cold Mirrors
    • >95% Reflection from 400 - 690nm
    • >90% Transmission from 700 - 1150nm
    • Optimized for 0° or 45° Angle of Incidence

    Linear Variable Edge Filters
    • Use in Pairs to Create High Efficiency Custom Bandpass Filters
    • Optimum Input Beam Diameter of 0.2 x 8.0mm
    • OD3 Blocking
    • Linear Variable Bandpass Filters Also Available

    Optical Cast Infrared (IR) Longpass Filters
    • Lightweight Plastic
    • Excellent Thermal and Chemical Resistance

    UV Longpass Filters
    • Ideal for UV Applications
    • For use with Longpass and Bandpass Filters
    • Various Sizes Available

    Flexible Thin Film UV Filters
    • Virtually Transparent, Flexible Polyster Filter
    • Deep-Dyed PET Substrate to Absorb UV Rays
    • <10% Transmission Below 390nm
    TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

    Multi-Edge Fluorescence Dichroic Filters
    • Multiple Cut-On Wavelengths On a Single Filter
    • High Peak Transmission, Excellent Blocking
    • Ideal for Simultaneous Viewing of Multiple Fluorophores
    • For Optimal Performance Pair with Multi-Band Fluorescence Bandpass Filters

    Cold Mirrors
    • 0° and 45° Angle of Incidence Options Available
    • Reflects 90% of Visible Light
    • Transmits 80% of the NIR and IR
    TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

    Raman Longpass Edge Filters
    • High Transmission for Detecting Weak Signals
    • Deep Blocking for Maximum Laser Rejection
    • Ideal for Raman Spectroscopy or Life Science Instrumentation 

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