Compare Model Drawings, CAD & Specs Cut-on Wavelength Cut-on Wavelength Tolerance Transmittance Range Availability Price
1 inch (25.4 mm) dielectric coated bandpass filter
Longpass Filter, Dielectric, 25.4 mm, 400 ± 5 nm Cut-On, 410 - 1200 nm
$117
In Stock
400 nm ± 5 nm 410 - 1200 nm
In Stock
1 inch (25.4 mm) dielectric coated bandpass filter
Longpass Filter, Dielectric, 25.4 mm, 450 ± 5 nm Cut-On, 460 - 1200 nm
$117
In Stock
450 nm ± 5 nm 460 - 1200 nm
In Stock
1 inch (25.4 mm) dielectric coated bandpass filter
Longpass Filter, Dielectric, 25.4 mm, 500 ± 5 nm Cut-On, 510 - 1200 nm
$117
5 Weeks
500 nm ± 5 nm 510 - 1200 nm
5 Weeks
1 inch (25.4 mm) dielectric coated bandpass filter
Longpass Filter, Dielectric, 25.4 mm, 550 ± 5 nm Cut-On, 560 - 1200 nm
$117
In Stock
550 nm ± 5 nm 560 - 1200 nm
In Stock
1 inch (25.4 mm) dielectric coated bandpass filter
Longpass Filter, Dielectric, 25.4 mm, 600 ± 5 nm Cut-On, 610 - 1200 nm
$117
In Stock
600 nm ± 5 nm 610 - 1200 nm
In Stock
1 inch (25.4 mm) dielectric coated bandpass filter
Longpass Filter, Dielectric, 25.4 mm, 650 ± 5 nm Cut-On, 660 - 1200 nm
$117
In Stock
650 nm ± 5 nm 660 - 1200 nm
In Stock
1 inch (25.4 mm) dielectric coated bandpass filter
Longpass Filter, Dielectric, 25.4 mm, 700 ±6 nm Cut-On, 715 - 1200 nm
$117
In Stock
700 nm ± 6 nm 715 - 1200 nm
In Stock
1 inch (25.4 mm) dielectric coated bandpass filter
Longpass Filter, Dielectric, 25.4 mm, 750 ± 6 nm Cut-On, 765 - 1200 nm
$117
In Stock
750 nm ± 6 nm 765 - 1200 nm
In Stock
1 inch (25.4 mm) dielectric coated bandpass filter
Longpass Filter, Dielectric, 25.4 mm, 800 ± 6 nm Cut-On, 815 - 1200 nm
$117
In Stock
800 nm ± 6 nm 815 - 1200 nm
In Stock
1 inch (25.4 mm) dielectric coated bandpass filter
Longpass Filter, Dielectric, 25.4 mm, 850 ± 7 nm Cut-On, 865 - 1200 nm
$117
In Stock
850 nm ± 6 nm 865 - 1200 nm
In Stock
1 inch (25.4 mm) dielectric coated bandpass filter
Longpass Filter, Dielectric, 25.4 mm, 900 ± 7 nm Cut-On, 920 - 1200 nm
$117
In Stock
900 nm ± 7 nm 920 - 1200 nm
In Stock
1 inch (25.4 mm) dielectric coated bandpass filter
Longpass Filter, Dielectric, 25.4 mm, 950 ± 7 nm Cut-On, 970 - 1200 nm
$117
In Stock
950 nm ± 7 nm 970 - 1200 nm
In Stock
1 inch (25.4 mm) dielectric coated bandpass filter
Longpass Filter, Dielectric, 25.4 mm, 1000±7 nm Cut-On, 1020 - 2200 nm
$117
1 Week
1000 nm ± 7 nm 1020 - 2200 nm
1 Week

Specifications

  • Type
    Dielectric Longpass Filter
  • Optic Size
    Ø25.4 mm
  • Angle of Incidence
  • Surface Quality
    80-50 scratch-dig
  • Size Tolerance
    +0/-0.5 mm
  • Temperature Range
    -50 to 100°C
  • Wavelength Shift with Temperature
    0.025 nm/°C
  • Humidity Resistance
    Per MIL-STD-810E, Method 507.3, Procedure III Modified to 7 cycles

Features

Superior Isolation Between Stopband and Passband

Our long wave pass filters feature both high transmission within the passband, and high rejection within the stop band, as well as a rapid transition, resulting in superior spectral isolation of a desired wavelength range. Out-of-band rejection for our longpass filters is OD≥3 and the stopband spans from X-ray to the edge wavelength. Typical transmission is ≥80% for our long-pass filters.

Angular Sensitivity and Fine Wavelength Tuning

Unlike colored glass filters, the filter edge wavelength for thin film filters will shift to shorter wavelengths with increased AOI. This can be useful for tilt tuning these shortpass filters to your exact wavelength. The shift may be calculated by: λθ = λo [1-(no/ne)2 sin2θ]1/2 where λθ is the wavelength at the new angle of incidence; λo is the center wavelength; no is the index of refraction of the environment (no = 1 in air); ne is the effective index of refraction of the filter; and θ is the angle of incidence. This property can be beneficial as the filters may be intentionally tilted to either stop or allow transmission of light from lasers or light sources near the edge wavelength. Our visible and IR filters have a particularly high ne, allowing more precise wavelength tuning.

400 to 1000 nm Cut-On Wavelengths

Our longpass optical filters are available in a wide range of cut-on wavelengths, ranging from 400 to 1000 nm. A custom bandpass filter with excellent performance can be constructed using a combination of a shortpass and a longpass filter. These filters are available individually and in sets. The longpass filter set consists of one filter for each available edge wavelength. They are shipped in a hardwood box for convenient storage and protection.

Optical Filter Mounts