IR Filters

IR Bandpass Filters

IR Bandpass Filters come in two types, Narrow (up to 250nm bandwidth) and Wide Bandpass (more than 500nm bandwidth). On request, Wavelength Opto-Electronic offers bandpass filters of varying bandwidths, IR wavelengths, coatings, shapes and sizes to meet the specific needs of the customer. These filters are used in Digital Imaging, IR Gas Analysis, Security Systems, High-temperature detection and in several fields.

Diameter Tolerance

+0/-0.2mm

Clear Aperture

>80%

Thickness

<10mm

CWL Tolerance

±2nm

FWHM

10±2nm

Peak Transmission

>45%

Block

<0.1%@200nm-12µm

CWL Shift

<0.02nm/℃

Part NumberDia (mm)Center λ (nm)FWHM (nm)T (%)Pass band Type
BFIR-1.5-0.0225.4150020>70Narrow
BFIR-1.5-0.0325.4150030>70Narrow
BFIR-1.5-0.0525.4150050>70Narrow
BFIR-1.5-0.125.41500100>70Narrow
BFIR-1.5-0.2525.41500250>70Narrow
BFIR-1.75-0.0225.4175020>70Narrow
BFIR-1.75-0.0325.4175030>70Narrow
BFIR-1.75-0.0525.4175050>70Narrow
BFIR-1.75-0.125.41750100>70Narrow
BFIR-1.75-0.2525.41750250>70Narrow
BFIR-2-0.0225.4200020>70Narrow
BFIR-2-0.0325.4200030>70Narrow
BFIR-2-0.0525.4200050>70Narrow
BFIR-2-0.125.42000100>70Narrow
BFIR-2-0.2525.42000250>70Narrow
BFIR-2.5-0.0225.4250020>70Narrow
BFIR-2.5-0.0325.4250030>70Narrow
BFIR-2.5-0.0525.4250050>70Narrow
BFIR-2.5-0.125.42500100>70Narrow
BFIR-2.5-0.2525.42500250>70Narrow
BFIR-3-0.0225.4300020>70Narrow
BFIR-3-0.0325.4300030>70Narrow
BFIR-3-0.0525.4300050>70Narrow
BFIR-3-0.125.43000100>70Narrow
BFIR-3-0.2525.43000250>70Narrow
BFIR-3.5-0.0225.4350020>70Narrow
BFIR-3.5-0.0325.4350030>70Narrow
BFIR-3.5-0.0525.4350050>70Narrow
BFIR-3.5-0.125.43500100>70Narrow
BFIR-3.5-0.2525.43500250>70Narrow
BFIR-4-0.0225.4400020>70Narrow
BFIR-4-0.0325.4400030>70Narrow
BFIR-4-0.0525.4400050>70Narrow
BFIR-4-0.125.44000100>70Narrow
BFIR-4-0.2525.44000250>70Narrow
BFIR-4.25-0.0225.4425020>70Narrow
BFIR-4.25-0.0325.4425030>70Narrow
BFIR-4.25-0.0525.4425050>70Narrow
BFIR-4.25-0.125.44250100>70Narrow
BFIR-4.25-0.2525.44250250>70Narrow
BFIR-4.5-0.0225.4450020>70Narrow
BFIR-4.5-0.0325.4450030>70Narrow
BFIR-4.5-0.0525.4450050>70Narrow
BFIR-4.5-0.125.44500100>70Narrow
BFIR-4.5-0.2525.44500250>70Narrow
BFIR-4.75-0.0225.4475020>70Narrow
BFIR-4.75-0.0325.4475030>70Narrow
BFIR-4.75-0.0525.4475050>70Narrow
BFIR-4.75-0.125.44750100>70Narrow
BFIR-4.75-0.2525.44750250>70Narrow
BFIR-5-0.0225.4500020>70Narrow
BFIR-5-0.0325.4500030>70Narrow
BFIR-5-0.0525.4500050>70Narrow
BFIR-5-0.125.45000100>70Narrow
BFIR-5-0.2525.45000250>70Narrow
BFIR-5.5-0.0225.4550020>70Narrow
BFIR-5.5-0.0325.4550030>70Narrow
BFIR-5.5-0.0525.4550050>70Narrow
BFIR-5.5-0.125.45500100>70Narrow
BFIR-5.5-0.2525.45500250>70Narrow
BFIR-6-0.0225.4600020>70Narrow
BFIR-6-0.0325.4600030>70Narrow
BFIR-6-0.0525.4600050>70Narrow
BFIR-6-0.125.46000100>70Narrow
BFIR-6-0.2525.46000250>70Narrow
BFIR-6.5-0.0225.4650020>70Narrow
BFIR-6.5-0.0325.4650030>70Narrow
BFIR-6.5-0.0525.4650050>70Narrow
BFIR-6.5-0.125.46500100>70Narrow
BFIR-6.5-0.2525.46500250>70Narrow
BFIR-7-0.0525.4700050>70Narrow
BFIR-7-0.125.47000100>70Narrow
BFIR-7-0.2525.47000250>70Narrow
BFIR-7.5-0.0525.4750050>70Narrow
BFIR-7.5-0.125.47500100>70Narrow
BFIR-7.5-0.2525.47500250>70Narrow
BFIR-8-0.0525.4800050>70Narrow
BFIR-8-0.125.48000100>70Narrow
BFIR-8-0.2525.48000250>70Narrow
BFIR-8.5-0.0525.4850050>70Narrow
BFIR-8.5-0.125.48500100>70Narrow
BFIR-8.5-0.2525.48500250>70Narrow
BFIR-9-0.0525.4900050>70Narrow
BFIR-9-0.125.49000100>70Narrow
BFIR-9-0.2525.49000250>70Narrow
BFIR-9.5-0.0525.4950050>70Narrow
BFIR-9.5-0.125.49500100>70Narrow
BFIR-9.5-0.2525.49500250>70Narrow
BFIR-10-0.0525.41000050>70Narrow
BFIR-10-0.125.410000100>70Narrow
BFIR-10-0.2525.410000250>70Narrow
BFIR-10.5-0.0525.41050050>70Narrow
BFIR-10.5-0.125.410500100>70Narrow
BFIR-10.5-0.2525.410500250>70Narrow
BFIR-11-0.0525.41100050>70Narrow
BFIR-11-0.125.411000100>70Narrow
BFIR-11-0.2525.411000250>70Narrow
BFIR-11.5-0.0525.41150050>70Narrow
BFIR-11.5-0.125.411500100>70Narrow
BFIR-11.5-0.2525.411500250>70Narrow
BFIR-1.5-0.525.41500500>70Wide
BFIR-1.5-0.725.41500700>70Wide
BFIR-1.5-0.825.41500800>70Wide
BFIR-1.5-125.415001000>70Wide
BFIR-1.75-0.525.41750500>70Wide
BFIR-1.75-0.725.41750700>70Wide
BFIR-1.75-0.825.41750800>70Wide
BFIR-1.75-125.417501000>70Wide
BFIR-2-0.525.42000500>70Wide
BFIR-2-0.725.42000700>70Wide
BFIR-2-0.825.42000800>70Wide
BFIR-2-125.420001000>70Wide
BFIR-2.5-0.525.42500500>70Wide
BFIR-2.5-0.725.42500700>70Wide
BFIR-2.5-0.825.42500800>70Wide
BFIR-2.5-125.425001000>70Wide
BFIR-3-0.525.43000500>70Wide
BFIR-3-0.725.43000700>70Wide
BFIR-3-0.825.43000800>70Wide
BFIR-3-125.430001000>70Wide
BFIR-3.5-0.525.43500500>70Wide
BFIR-3.5-0.725.43500700>70Wide
BFIR-3.5-0.825.43500800>70Wide
BFIR-3.5-125.435001000>70Wide
BFIR-4-0.525.44000500>70Wide
BFIR-4-0.725.44000700>70Wide
BFIR-4-0.825.44000800>70Wide
BFIR-4-125.440001000>70Wide
BFIR-4.25-0.525.44250500>70Wide
BFIR-4.25-0.725.44250700>70Wide
BFIR-4.25-0.825.44250800>70Wide
BFIR-4.25-125.442501000>70Wide
BFIR-4.5-0.525.44500500>70Wide
BFIR-4.5-0.725.44500700>70Wide
BFIR-4.5-0.825.44500800>70Wide
BFIR-4.5-125.445001000>70Wide
BFIR-4.75-0.525.44750500>70Wide
BFIR-4.75-0.725.44750700>70Wide
BFIR-4.75-0.825.44750800>70Wide
BFIR-4.75-125.447501000>70Wide
BFIR-5-0.525.45000500>70Wide
BFIR-5-0.725.45000700>70Wide
BFIR-5-0.825.45000800>70Wide
BFIR-5-125.450001000>70Wide
BFIR-5.5-0.525.45500500>70Wide
BFIR-5.5-0.725.45500700>70Wide
BFIR-5.5-0.825.45500800>70Wide
BFIR-5.5-125.455001000>70Wide
BFIR-6-0.525.46000500>70Wide
BFIR-6-0.725.46000700>70Wide
BFIR-6-0.825.46000800>70Wide
BFIR-6-125.460001000>70Wide
BFIR-6.5-0.525.46500500>70Wide
BFIR-6.5-0.725.46500700>70Wide
BFIR-6.5-0.825.46500800>70Wide
BFIR-6.5-125.465001000>70Wide
BFIR-7-0.525.47000500>70Wide
BFIR-7-0.725.47000700>70Wide
BFIR-7-0.825.47000800>70Wide
BFIR-7-125.470001000>70Wide
BFIR-7.5-0.525.47500500>70Wide
BFIR-7.5-0.725.47500700>70Wide
BFIR-7.5-0.825.47500800>70Wide
BFIR-7.5-125.475001000>70Wide
BFIR-8-0.525.48000500>70Wide
BFIR-8-0.725.48000700>70Wide
BFIR-8-0.825.48000800>70Wide
BFIR-8-125.480001000>70Wide
BFIR-8.5-0.525.48500500>70Wide
BFIR-8.5-0.725.48500700>70Wide
BFIR-8.5-0.825.48500800>70Wide
BFIR-8.5-125.485001000>70Wide
BFIR-9-0.525.49000500>70Wide
BFIR-9-0.725.49000700>70Wide
BFIR-9-0.825.49000800>70Wide
BFIR-9-125.490001000>70Wide
BFIR-9.5-0.525.49500500>70Wide
BFIR-9.5-0.725.49500700>70Wide
BFIR-9.5-0.825.49500800>70Wide
BFIR-9.5-125.495001000>70Wide
BFIR-10-0.525.410000500>70Wide
BFIR-10-0.725.410000700>70Wide
BFIR-10-0.825.410000800>70Wide
BFIR-10-125.4100001000>70Wide
BFIR-10.5-0.525.410500500>70Wide
BFIR-10.5-0.725.410500700>70Wide
BFIR-10.5-0.825.410500800>70Wide
BFIR-10.5-125.4105001000>70Wide
BFIR-11-0.525.411000500>70Wide
BFIR-11-0.725.411000700>70Wide
BFIR-11-0.825.411000800>70Wide
BFIR-11-125.4110001000>70Wide
BFIR-11.5-0.525.411500500>70Wide
BFIR-11.5-0.725.411500700>70Wide
BFIR-11.5-0.825.411500800>70Wide
BFIR-11.5-125.4115001000>70Wide

IR Longpass Filters

IR Longpass Filters transmit light higher than the cut-on wavelengths and attenuate the shorter wavelengths. Wavelength Opto-Electronic provides long pass filters of versatile coatings, cut-on wavelengths, sizes and shapes in the IR region. Customize IR Long pass filters are also available. These filters are popularly used in Spectroscopy, Thermography, and Metrology & Device Engineering.

Diameter Tolerance

+0/-0.2mm

Clear Aperture

>80%

Thickness

<10mm

Cut-on Tolerance

±2nm

Cut-off Tolerance

±2nm

Peak Transmission

>70-80%

Block

<0.1%

CWL Shift

<0.02nm/℃

Part NumberDia (mm)Cut-on λ (nm)Blocking λ (nm)Transmitting λ (nm)T (%)
LFIR-1.05-125.41050200-10501060-12000> 80
LFIR-1.5-125.41500200-15001510-12000> 80
LFIR-1.75-125.41750200-17501760-12000> 80
LFIR-2-125.42000200-20002010-12000> 80
LFIR-2.5-125.42500200-25002510-12000> 80
LFIR-3-125.43000200-30003010-12000> 80
LFIR-3.5-125.43500200-35003510-12000> 80
LFIR-4-125.44000200-40004010-12000> 80
LFIR-4.5-125.44500200-45004510-12000> 80
LFIR-5-125.45000200-50005010-12000> 80
LFIR-5.5-125.45500200-55005550-12000> 80
LFIR-6-125.46000200-60006020-12000> 80
LFIR-6.5-125.46500200-65006520-12000> 80
LFIR-7-125.47000200-70007050-12000> 80
LFIR-7.5-125.47500200-75007550-12000> 80
LFIR-8-125.48000200-80008030-12000> 80
LFIR-8.5-125.48500200-85008520-12000> 80
LFIR-9-125.49000200-90009050-12000> 80
LFIR-9.5-125.49500200-95009550-12000> 80
LFIR-10-125.410000200-1000010000-12000> 80
LFIR-10.5-125.410500200-1050010550-12000> 80
LFIR-11-125.411000200-1100011050-12000> 80
LFIR-11.5-125.411500200-1150011520-12000> 80

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