Standard infrared bandpass filters

From Andover

Bandpass filters isolate specific regions of the spectrum, simultaneously providing high transmission of desired energy, and deep rejection of unwanted energy. Available in wide or narrow bandwidths, they can be tailored to suit your specific requirements.

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.

Features
Useful for isolating narrow spectral regions
Constructed of hard, durable first-surface coatings
Available in standard and custom wavelengths up to 14µm
Filters offered in 25mm dia, but custom sizes, shapes and optical characteristics available
General Specifications
Diameter Tolerance+0/-0.1 mm
Min. Clear Aperture21 mm Dia.
Transmission (Typ.)60-80%
BlockingT < 0.1% Average to 30 µm
24-hour Humidityper MIL-C-48497A
Moderate Abrasionper MIL-C-48497A
Adhesionper MIL-C-48497A
OptionalMounted in threaded ring - contact our expert on the right for thread sizes

 Standard IR gas analysis bandpass filters

GasCenter W/LBandwidthPart Number
Water Vapor2.70 ± 0.03 µm
2.95 ± 0.03 µm
120 ± 30 nm
130 ± 30 nm
2.70GA05-25
2.95GA05-25
Methane and Ethanol3.46 ± 0.04 µm140 ± 30 nm3.46GA05-25
Formaldehyde3.60 ± 0.04 µm140 ± 30 nm3.60GA05-25
CO24.26 ± 0.04 µm120 ± 30 nm4.26GA05-25
CO4.67 ± 0.05 µm150 ± 30 nm4.70GA05-25
NO5.30 ± 0.05 µm420 ± 50 nm5.30GA05-25
SWIR4.00 ± 0.20 µm2000 ± 200 nm4.00GA20-25
FIR Broadband10.0 ± 0.20 µm4000 ± 200 nm10.00GA40-25
CO210.6 ± 0.10 µm420 ± 100 nm10.60GA15-25

Custom IR Bandpass Filters

 Andover can design and fabricate custom bandpass filters to suit your particular requirements. Every phase of the process is performed in-house, including thin-film coating design, mechanical design, substrate fabrication and polishing, coating, inspection and environmental testing.

We can coat a variety of substrate materials, including Germanium, Sapphire, Silicon, Calcium Fluoride, Zinc, Sulfide and Zinc Selenide. Contact our expert on the right for a quotation, whether it is for prototype quantities or production quantities.

Custom IR Bandpass Filter Specifications

Custom spectral and physical properties available upon request

Bandwidth
(% of CW/L)
W/L RangeTransmission
(Typ.)
BlockingPart Numbers
>10%2.4 µm - 5.0 µm
5.1 µm - 6.5 µm
6.6 µm - 8.5 µm
8.6 µm - 10.3 µm
10.4 µm - 14.0 µm
70-80%
70-80%
60-70%
60-70%
50-60%
0.3 to 40 µm
0.3 to 15 µm
0.3 to 15 µm
0.3 to 15 µm
0.3 to 15 µm
IRFC10-25
IRFC12-25
IRFC14-25
IRFC16-25
IRFC18-25
1.5-10%2.4 µm - 5.0 µm
5.1 µm - 6.5 µm
6.6 µm - 8.5 µm
8.6 µm - 10.3 µm
10.4 µm - 14.0 µm
70-80%
70-80%
60-70%
60-70%
50-60%
0.3 to 40 µm
0.3 to 15 µm
0.3 to 15 µm
0.3 to 15 µm
0.3 to 15 µm
IRFC20-25
IRFC22-25
IRFC24-25
IRFC26-25
IRFC28-25
Environmental monitoring
Security systems
FLIR systems
Avionics

Contacts

Request further information
Product Manager
+33 1 69194949
Fax: +33 1 69194930
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