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Bandpass Filters
UV-VIS-NIR
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.
| Gas | Center W/L | Bandwidth |
Part Number |
| Water Vapor | 2.70 µm | 3.5 - 5% of Center W/L |
2.70GA05-25 |
| Water Vapor | 2.95 µm | 3.5 - 5% of Center W/L |
2.95GA05-25 |
| Methane and Ethanol | 3.46 µm | 3.5 - 5% of Center W/L |
3.46GA05-25 |
| CO2 | 4.26 µm | 3.5 - 5% of Center W/L |
4.26GA05-25 |
| CO | 4.70 µm | 3.5 - 5% of Center W/L |
4.70GA05-25 |
| General Specifications | |
|---|---|
| Diameter Tolerance: | +0/-.1mm |
| Minimum Clear Aperture: | 21mm |
| Center W/L tolerance: | ±0.05nm |
| Transmission (Ave): | 60 - 80% |
| Surface Quality: | 60/40 per MIL-C-48497A |
| Coating Quality: | 60/40 per MIL-C-48497A |
| 24-hour Humidity: | per MIL-C-48497A |
| Moderate Abrasion: | per MIL-C-48497A |
| Adhesion: | per MIL-C-48497A |