Andover Corporation

Standard Infrared Bandpass Filters for Gas Analysis

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.

For your convenience and economy, we offer the filters in 25mm dia. However, we can produce custom sizes and shapes, as well as custom optical characteristics. Contact our technical sales department for a quotation.

For center w/l and bandwith specifications, click the desired part number link.

 

 

Gas	Center W/L	Bandwidth	Part Number
Water Vapor	2.70 µm	120 nm	2.70GA05-25
Water Vapor	2.95 µm	130 nm	2.95GA05-25
Methane and Ethanol	3.46 µm	140 nm	3.46GA05-25
Formaldehyde	3.60 µm	140 nm	3.60GA05-25
CO2	4.26 µm	120 nm	4.26GA05-25
CO	4.67 µm	150 nm	4.70GA05-25
NO	5.30 µm	420 nm	5.30GA05-25

 

 

 

General Specifications
Diameter Tolerance:	+0/-.1mm
Minimum Clear Aperture:	21mm
Transmission (Typ):	60 - 80%

 

 

 

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