Standard IR Long Pass Filters

Standard IR Long Pass Filters

Long wave pass filters are often used for order sorting, they isolate broad regions of the spectrum, simultaneously providing high transmission of desired energy, and deep rejection of unwanted energy.
Constructed of hard, durable first-surface dielectric coatings on optical-quality IR-transmitting substrates, these filters will withstand normal cleaning and handling associated with any high-quality optical component.
For your convenience and economy, we offer the filters in three standard sizes: 12.5mm, 25mm and 50mm dia.
However, we can produce custom sizes and shapes, as well as custom optical characteristics.
Contact our technical sales department for a quotation.
  • High transmission efficiency (>85%) in pass band
  • Deep rejection of unwanted wavelengths
  • Durable first-surface dielectric coatings
  • Superior environmental stability
  • Excellent cleaning and handling durability
  • Available in both standard and custom wavelengths
  • Precise spectral separation capabilities
  • Compatible with high-volume production
  • Custom sizes and shapes available
  • Withstands normal cleaning and handling
  • Order Sorting
  • FTIR Spectroscopy
  • Thermal Imaging
  • Spectral Analysis
  • Environmental Monitoring
  • Gas Detection
  • Temperature Sensing
  • Scientific Research
  • Industrial Process Control
  • Defense and Security Systems
  • Standard Sizes: 12.5mm, 25mm, and 50mm diameter
  • Thickness: 1.0±0.2mm
  • Diameter Tolerance: +0/-0.1mm
  • Minimum Clear Aperture: 90% of outside dimension
  • Substrate Materials: Silicon or Germanium
  • Flatness: <5 waves at cut-on wavelength
  • Operating Temperature: -62°C to +71°C
  • Parallelism: <10 arc minutes
  • Transmission: >85% from 1.05x cut-on to 2.0x cut-on
  • Rejection Average: <0.1%
  • Slope: <7% (12% for 1.05µm filter)
  • Humidity Resistance: Per MIL-C-48497A

Showing 1–16 of 21 results

    PART NO.
    DESCRIPTION
    1 - 5 pcs.
    6 - 10 pcs.
    > 10 pcs.
    Stock Status

    1.05ILP-12.5

    Long Pass Filters 1050nm/LWP/12.5mm dia.

    $151.00
    $127.00
    $107.00
    In Stock

    1.65ILP-12.5

    Long Pass Filters 1650nm/LWP/12.5mm dia.

    $159.00
    $134.00
    $113.00
    In Stock

    1.05ILP-25

    Long Pass Filters 1050nm/LWP/25mm dia.

    $330.00
    $277.00
    $234.00
    In Stock

    1.65ILP-25

    Long Pass Filters 1650nm/LWP/25mm dia.

    $362.00
    $304.00
    $257.00
    In Stock

    1.05ILP-50

    Long Pass Filters 1050nm/LWP/50mm dia.

    $531.00
    $446.00
    $377.00
    In Stock

    1.65ILP-50

    Long Pass Filters 1650nm/LWP/50mm dia.

    $559.00
    $470.00
    $397.00
    In Stock

    2.40ILP-12.5

    Long Pass Filters 2400nm/LWP/12.5mm dia.

    $174.00
    $146.00
    $124.00
    In Stock

    2.40ILP-25

    Long Pass Filters 2400nm/LWP/25mm dia.

    $393.00
    $330.00
    $279.00
    In Stock

    2.40ILP-50

    Long Pass Filters 2400nm/LWP/50mm dia.

    $624.00
    $524.00
    $443.00
    In Stock

    3.60ILP-12.5

    Long Pass Filters 3600nm/LWP/12.5mm dia.

    $186.00
    $156.00
    $132.00
    In Stock

    3.60ILP-25

    Long Pass Filters 3600nm/LWP/25mm dia.

    $408.00
    $343.00
    $290.00
    In Stock

    3.60ILP-50

    Long Pass Filters 3600nm/LWP/50mm dia.

    $679.00
    $570.00
    $482.00
    In Stock

    4.50ILP-12.5

    Long Pass Filters 4500nm/LWP/12.5mm dia.

    $204.00
    $171.00
    $145.00
    In Stock

    4.50ILP-25

    Long Pass Filters 4500nm/LWP/25mm dia.

    $451.00
    $379.00
    $320.00
    In Stock

    4.50ILP-50

    Long Pass Filters 4500nm/LWP/50mm dia.

    $742.00
    $623.00
    $527.00
    In Stock

    6.00ILP-12.5

    Long Pass Filters 6000nm/LWP/12.5mm dia.

    $205.00
    $172.00
    $146.00
    In Stock