Infrared IR Filters for the shortwave IR band, mid-IR band and the longwave IR band.

Infrared Filters

Infrared Filters
REFLEX Analytical complements their product line of infrared optics and lenses with infrared (IR) filters. An IR filter is an optic which is specifically fabricated to remove visible light and only pass infrared light. In military, security and surveillance applications the near and mid-infrared are of most interest, and these are usually divided into the shortwave infrared band between 0.7 and 4m, the midwave infrared band between 4 and 6m, and the longwave infrared band between 8 and 15m.

Why the different infrared labels? For military applications what is of interest is the radiation that can penetrate the atmosphere and be detected. It turns out that the short, mid and longwave infrared bands correspond to those wavelengths that easily penetrate air without being rapidly absorbed or scattered. The shortwave infrared band is associated with jet engine exhausts, gun barrel exhaust gases, munition explosions and other hot objects. The midwave infrared band is associated with running turbine and piston engines, and other high temperature operating objects. The longwave infrared band is associated with human body heat, structures or buildings, and other objects at similar temperatures.

REFLEX Analytical offers a series of IR filter types depending upon the application's requirement. Each IR filter type is wavelength and application dependent. Scroll below for examples, spectral transmission curves, pricing and order details.

The export of this product without proper licensing is strictly prohibited and falls under ITAR per title 22, CFR, parts 120-130. Please contact REFLEX Analytical Corporation to receive further information on how to obtain proper licensing from the U.S. Department of State.

Mid-Infrared Bandpass Filters (CWL 2.70m, 2.95m, 3.46m, 3.6m, 4.0m, 4.26m, 4.67m, 5.30m, 10.0m and 10.6m) CLICK HERE to download the product sheet.

8 - 12m Infrared Bandpass Filter average 80% transmittance between 8 - 12m blocking less than 0.10% transmittance from UV - 20m. Also available to order below are Infrared Broadband Filters for the wavelength range 3 - 5m, 8 - 12m, 2 - 14m and 8 - 14m.
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Infrared Broadband Filter
Infrared Broadband Filter
The 1.1 - 25m infrared filter is typically used to detect infrared radiation remotely to determine the temperature of objects. This is termed thermography and also know as forward looking infrared (FLIR). Thermography (thermal or FLIR imaging) is mainly used in military, law enforcement and industrial applications but the technology has reached the public market in the form of infrared cameras on automobiles. Thermographic and FLIR cameras detect radiation in the infrared range of the electromagnetic spectrum (0.9 - 14m) and produce images of that radiation. FLIR devices allow personnel to see objects in total darkness, through smoke, and other challenging conditions without revealing their presence or offering awareness the perimeter is being monitored. Night vision devices are not required with thermal or FLIR imagers since heat generating objects reveal themselves. Contact REFLEX Analytical to discuss your requirement. Custom components are encouraged and quoted upon request.
Infrared Bandpass Filter
Infrared Bandpass Filter
The 8 - 12m infrared bandpass filter is used in many applications including infrared tracking (also known as infrared homing). Infrared homing is a passive system in which heat generated by the target is detected and homed on. Typically used in the anti-aircraft role to track the heat of jet engines. In the case of passive missile guidance systems, missiles which use infrared seeking are often referred to as "heat-seekers". Many objects such as vehicle engines and aircraft generate and retain heat, and as such, are especially noticeable in the infrared wavelengths of light compared to objects in the background. Early infrared seekers were most effective in detecting infrared radiation with shorter wavelengths, such as the 4.2m emissions of the carbon dioxide efflux of a jet engine. Modern infrared seekers operate in the 8 - 12m wavelength range, which is absorbed least by the atmosphere. For example, generally longer wavelength infrared (LWIR) 8 - 12m will suffer less signal transfer than shorter wavelength IR (SWIR) in haze and fog. Contact REFLEX Analytical to discuss your requirement. Available in a 1.0" diameter. Custom components are encouraged and quoted upon request.
2.70m Infrared Bandpass Filter
Water Vapor Wavelength

Spectral Transmission Curve CLICK HERE

25mm Diameter x 1mm Thickness
$699.00
IR-BPF-2.70
2.95m Infrared Bandpass Filter
Water Vapor Wavelength

Spectral Transmission Curve CLICK HERE

25mm Diameter x 1mm Thickness
$699.00
IR-BPF-2.95
3.46m Infrared Bandpass Filter
Methanol and Ethanol Wavelength

Spectral Transmission Curve CLICK HERE

25mm Diameter x 1mm Thickness
$699.00
IR-BPF-3.46
3.60m Infrared Bandpass Filter
Formaldehyde Wavelength

Spectral Transmission Curve CLICK HERE

25mm Diameter x 1mm Thickness
$699.00
IR-BPF-3.60
4.0m Infrared Bandpass Filter
SWIR Wavelength

Spectral Transmission Curve CLICK HERE

25mm Diameter x 1mm Thickness
$699.00
IR-BPF-4.0
4.26m Infrared Bandpass Filter
CO2 Wavelength

Spectral Transmission Curve CLICK HERE

25mm Diameter x 1mm Thickness
$699.00
IR-BPF-4.26
4.67m Infrared Bandpass Filter
CO Wavelength

Spectral Transmission Curve CLICK HERE

25mm Diameter x 1mm Thickness
$699.00
IR-BPF-4.67
5.30m Infrared Bandpass Filter
NO Wavelength

Spectral Transmission Curve CLICK HERE

25mm Diameter x 1mm Thickness
$699.00
IR-BPF-5.3
10.0m Infrared Bandpass Filter
FIR Wavelength

Spectral Transmission Curve CLICK HERE

25mm Diameter x 1mm Thickness
$1,299.00
IR-BPF-10
10.6m Infrared Bandpass Filter
CO2 Laser Wavelength

Spectral Transmission Curve CLICK HERE

12.5mm Diameter x 1mm Thickness
$729.00
IR-BPF-10.6-12.5
10.6m Infrared Bandpass Filter
CO2 Laser Wavelength

Spectral Transmission Curve CLICK HERE

25mm Diameter x 1mm Thickness
$1,299.00
IR-BPF-10.6-25
10.6m Infrared Bandpass Filter
CO2 Laser Wavelength

Spectral Transmission Curve CLICK HERE

50mm Diameter x 1mm Thickness
$2,899.00
IR-BPF-10.6-50
3 5m Infrared Broadband Filter
Spectral Transmission Curve CLICK HERE

25mm Diameter x 1mm Thickness
$249.00
IR-BBF3-5-25
3 5m Infrared Broadband Filter
Spectral Transmission Curve CLICK HERE

50mm Diameter x 1mm Thickness
$479.00
IR-BBF3-5-50
8 12m Infrared Bandpass Filter
Spectral Transmission Curve CLICK HERE

25.4mm Diameter x 1mm Thickness
$1,199.00
IR-BPF8-12-25.4
8 12m Infrared Broadband Filter
Spectral Transmission Curve CLICK HERE

25mm Diameter x 1mm Thickness
$249.00
IR-BBF8-12-25
8 12m Infrared Broadband Filter
Spectral Transmission Curve CLICK HERE

50mm Diameter x 1mm Thickness
$479.00
IR-BBF8-12-50
2 14m Infrared Broadband Filter
Spectral Transmission Curve CLICK HERE

25mm Diameter x 1mm Thickness
$249.00
IR-BBF2-14-25
2 14m Infrared Broadband Filter
Spectral Transmission Curve CLICK HERE

50mm Diameter x 1mm Thickness
$479.00
IR-BBF2-14-50
8 14m Infrared Broadband Filter
Spectral Transmission Curve CLICK HERE

25mm Diameter x 1mm Thickness
$249.00
IR-BBF8-14-25
8 14m Infrared Broadband Filter
Spectral Transmission Curve CLICK HERE

50mm Diameter x 1mm Thickness
$479.00
IR-BBF8-14-50