Longpass Filters

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High Performance OD 4.0 Longpass Filters High Performance OD 4.0 Longpass Filters
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
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OD 4.0 High Performance Shortpass and Longpass Filter Kits OD 4.0 High Performance Shortpass and Longpass Filter Kits
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
  • Precision Cut-On and Cut-Off Wavelengths
  • OD 4.0 Shortpass or OD 4.0 Longpass Configurations
  • Ideal for Lab Integration
  • Note: Potential change of packaging
OD 2.0  Longpass Filters OD 2.0 Longpass Filters
SCHOTT Colored Glass Longpass Filters SCHOTT Colored Glass Longpass Filters
  • 27 Standard SCHOTT Color Glass Types
  • Cut-On Wavelengths in the UV, Visible, or NIR
  • Standard Circular and Square Sizes with 1, 2, or 3mm Thickness
Dichroic Longpass Filters Dichroic Longpass Filters
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
  • Ideal for Fluorescence or Multispectral Imaging
  • Sharp Cut-On Wavelength
  • Broad Transmission and Reflection Ranges
Fluorescence Dichroic Filters Fluorescence Dichroic Filters
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
High Performance Fluorescence Dichroic Filters High Performance Fluorescence Dichroic Filters
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
  • 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
  • Standard Fluorescence Dichroic Filters are also available
Colored Glass Replacement Longpass Filters Colored Glass Replacement Longpass Filters
  • Dielectric Coated Longpass Filters
  • >90% Typical Transmission and >OD5 Blocking
  • 100% Environmentally Safe, RoHS Compliant Construction
  • Cut-On Wavelengths from 320 to 1000nm
Infrared (IR) Longpass Filters Infrared (IR) Longpass Filters
  • Coated on Silicon or Germanium Substrates
  • Ideal for Isolating Broad Spectral Regions
  • Durable, First-Surface Coatings
High Performance Cold Mirrors High Performance Cold Mirrors
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
  • >95% Reflection from 400 - 690nm
  • >90% Transmission from 750 - 1200nm
  • Optimized for 0° or 45° Angle of Incidence
SWIR Longpass Filters SWIR Longpass Filters
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
  • Block Visible Wavelengths
  • Ideal for Machine Vision Applications
  • Can Be Used as Cold Mirrors
  • Additional Longpass Edge Filters Available
Dichroic Laser Beam Combiners Dichroic Laser Beam Combiners
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
  • Polarization Insensitive
  • Hard Sputtered Coating
  • Multiple Sizes Available
Nd:YAG Harmonic Separators Nd:YAG Harmonic Separators
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
New
  • Used to Separate Nd:YAG Harmonic Wavelengths
  • Beamsplitter Coating Features >95% Transmission
  • λ/10 Fused Silica Substrate
Laser Line Longpass Filters Laser Line Longpass Filters
  • Up to 93% Transmission to Detect Weak Signals
  • Deep > OD 6 Blocking for Maximum Laser Rejection
  • Ideal for Raman Spectroscopy, Confocal Microscopy, and Biotech Instrumentation
  • Unrivaled Performance and Lifetime
Hoya Colored Glass Longpass Filters Hoya Colored Glass Longpass Filters
  • UV, VIS and IR Pass Ranges
  • VIS Can Be Used for Color Bandpass
  • Also Available Mounted
C-Mount Longpass Glass Color Filters C-Mount Longpass Glass Color Filters New
  • Pre-Mounted in Engraved C-Mount Housings
  • Simplify Integration into Optical Systems
  • SCHOTT or Hoya Color Glass Filters Available
  • Also Available Unmounted
Everix Ultra-Thin Longpass Filters Everix Ultra-Thin Longpass Filters New
  • Ultra-Thin, Flexible Substrate
  • Sharp Cut-On Wavelength Designs
  • Extruded Thin Film, Insensitive to Scratches
Optical Cast Infrared (IR) Longpass Filters Optical Cast Infrared (IR) Longpass Filters
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  • Lightweight Plastic
  • Excellent Thermal and Chemical Resistance
Linear Variable Edge Filters 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
Flexible Thin Film UV Filters Flexible Thin Film UV Filters
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  • Virtually Transparent, Flexible Polyester Filter
  • Deep-Dyed PET Substrate to Absorb UVA, UVB, and UVC Rays
  • <10% Transmission Below 390nm
OD 2.0 Longpass Filters OD 2.0 Longpass Filters
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
  • Sharp Cut-On Wavelength
  • High Rejection/Transmission Efficiency
  • Precision Fused Silica Substrate
  • Variety of OD 2.0 Longpass Filter Kits are Available
Cold Mirrors Cold Mirrors
  • 0° and 45° Angle of Incidence Options Available
  • Reflects 90% of Visible Light
  • Transmits 80% of the NIR and IR
ISP Optics Infrared (IR) Dichroic Beamsplitters ISP Optics Infrared (IR) Dichroic Beamsplitters New
  • Separate Visible Light from Infrared (3-12µm) Light
  • Visible Transmitting/Infrared Reflecting and Visible Reflecting/Infrared Transmitting Designs
  • Ideal for Combining Visible Guide Lasers with MWIR Lasers

Longpass Filters, also known as Longpass Edge Filters, are designed to transmit wavelengths greater than the cut-on wavelength of the filter. Longpass 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 Filters can be used with Shortpass 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. The phrase "High-Pass Filter" is commonly used to refer to frequency instead of wavelength, so "High-Pass Filter" counterintuitively refers to Shortpass Filters, not Longpass Filters. "Lowpass Filter" similarly describes frequency and refers to Longpass Filters.

Edmund Optics offers a wide variety of Longpass Edge Filters for performance in the ultraviolet, visible, or infrared wavelengths. Longpass 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.

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