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12.4µm CWL, 25.0mm Diameter, 0.25µm FWHM, IR Bandpass Filter

Stock #17-253 10 to 12 days
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Qty 10+
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Diameter (mm):
25.00 +0.00/-0.20
Angle of Incidence (°):
Optical Density OD (Average):
Clear Aperture CA (mm):
Center Wavelength CWL (nm):
12,400.00 ±124
Full Width-Half Max FWHM (nm):
500.00 ±50
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Germanium (Ge)
Traditional Coated
Surface Quality:
Thickness (mm):
1.00 ±0.2
Transmission (%):
≥65 (at peak)
Bandpass Filter
Typical Applications:
Atmospheric/Solar Imaging
Blocking Wavelength Range (nm):
200 - 16000
Center Wavelength CWL (µm):
12.40 ±0.124
Full Width-Half Max FWHM (µm):
0.25 ±0.05

Regulatory Compliance

Certificate of Conformance:

Product Family Description

  • Ideal for Gas Analysis
  • Center Wavelengths of 2.7-12.4μm
  • Single Substrate Interference Filter

Infrared (IR) Bandpass Filters, developed with durability in mind, provide the high transmission and deep rejection needed to isolate narrow spectral regions. The single substrate dielectric construction ensures easy maintenance, allowing for use in harsh environments. The filters are ideal for environmental monitoring, security and FLIR applications. Infrared (IR) Bandpass Filters have center wavelengths of 2.7-12.4μm. These filters are available in a 12.5, 25, or 50mm diameters, in a variety of center wavelengths. 

Bandpass interference filters are used extensively in a variety of biotech, biomedical, and quantitative chemical applications to selectively transmit a narrow range of wavelengths while blocking all others. Interference filters are widely used in instrumentation for applications including clinical chemistry, environmental testing, colorimetry, elemental and laser line separation, flame photometry, fluorescence, and immunoassays. In addition, interference filters are used to select discrete spectral lines from arc or gas discharge lamps, including Hg, Xe, and Cd, and to isolate a particular line from Ar, Kr, Nd:YAG, and other lasers. Bandpass interference filters are often used in conjunction with laser diode modules and LEDs.

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