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COTS Filters and Polarizers

COTS Filters and Polarizers are used to transmit certain wavelengths or polarization states of light for a range of defense or security applications. COTS Filters are designed to transmit a certain wavelength or wavelengths while reflecting unwanted wavelengths. COTS Polarizers transmit only specific polarizations of light. COTS Filters and Polarizers are an easier, low cost alternative to developing similar custom components. Products designed for different wavelengths or polarizations are available to suit many applications’ needs.


Absorptive Neutral Density (ND) Filters
  • Attenuates Visible Light Via Absorption, Rather than Reflection
  • Multiple Filters Can be Stacked for Increased Blocking
  • Optical Densities from 0.1 to 4.0 are Available

Fluorescence Bandpass Filters
  • Common Wavelengths for Popular Fluorophores
  • >93% Transmission
  • >OD 6 Blocking, <3% from Edge of Bandwidth

Hard Coated OD 4 10nm Bandpass Filters
  • Ideal for Life Sciences or Chemical Analysis
  • Available in UV, VIS, and IR Center Wavelengths
  • Feature High Performance Hard Coatings
  • Hard Coated OD 4 25nm and 50nm Bandpass Filters Also Available

High Performance OD 4 Longpass Filters
  • Cut-On Slope <1%
  • Rejection OD ≥ 4.0
  • ≥91% Transmission in Pass Band

High Performance OD 4 Shortpass Filters
  • Broad Transmission and Rejection Ranges
  • Sharp Slope for Effective Spectral Discrimination
  • Combine with Longpass Filter for Custom Bandpass Ranges

Infrared (IR) Neutral Density (ND) Filters
  • Spectrally Flat from 2μm to 14μm
  • Precision Germanium Substrate

Linear Glass Polarizing Filters
  • 95% Polarization Efficiency
  • 30% Typical Single Transmission of Unpolarized Light from 400 - 700nm
  • 0.15% Average Crossed Transmission from 400 - 700nm
  • Also Available Mounted

OD 2 Longpass Filters
  • Sharp Cut-On Wavelength
  • High Rejection/Transmission Efficiency
  • Precision Fused Silica Substrate

Longpass Glass Color Filters
  • UV, VIS and IR Pass Ranges
  • VIS Can Be Used for Color Bandpass

Mounted Infrared (IR) Filters
  • Pass Only Visible Light or Only IR
  • IR-Cut are Ideal for Use As Heat-Absorbing Filters

Near-IR (NIR) Neutral Density (ND) Filters
  • Ideal for NIR Wavelengths 700-1100nm
  • Optical Densities Ranging from 0.3 to 3.0

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

OD 2 Shortpass Filters
  • Sharp Cut-Off Wavelength
  • High Transmission / Rejection Efficiency
  • Precision Fused Silica Substrate

Traditional Coated 193 – 399nm Bandpass Interference Filters
  • Available in UV, Visible, and IR Center Wavelengths
  • 10 – 80nm Bandwidths Available
  • Ideal for Biomedical Applications and Instrumentation Integration
  • 193-399nm, 400-699nm, and 700-1650nm CWL Options Available

Traditional Coated 400 – 699nm Bandpass Interference Filters
  • Available in UV, Visible, and IR Center Wavelengths
  • 10 – 80nm Bandwidths Available
  • Ideal for Biomedical Applications and Instrumentation Integration
  • 193-399nm, 400-699nm, and 700-1650nm CWL Options Available

Traditional Coated 700 – 1650nm Bandpass Interference Filters
  • Available in UV, Visible, and IR Center Wavelengths
  • 10 – 80nm Bandwidths Available
  • Ideal for Biomedical Applications and Instrumentation Integration
  • 193-399nm, 400-699nm, and 700-1650nm CWL Options Available

High Contrast Glass Linear Polarizers
  • 10,000:1 High Extinction Ratio for 400 - 700nm
  • Polarization Axis is Reference Marked
  • Anti-Reflection Coated to Minimize Reflection Loss

UV-NIR Neutral Density Filters
  • Constant Transmission from 190 – 1700nm
  • Can be Stacked to Create Intermediate Density Values
  • Multiple Optical Densities Available

UV-VIS Neutral Density (ND) Filters
  • Ideal for 250-700nm Sources
  • Optical Densities Ranging from 0.3 to 3.0

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