Our Bandpass Filters pass a narrow spectral band of UV, visible, or NIR radiation and reject out-of-band wavelengths from the X-ray to the far IR. Applications include spectral radiometry, medical diagnostics, chemical analysis, colorimetry, astronomy, and wherever spectral isolation is required.
- Out-of-band blocking to less than 0.01% (10-4)
- Center wavelengths available from 206 nm to 900 nm
- Excellent temperature stability
- 25.4 mm diameter and 50.8 mm square sizes
- Superior lifetime in harsh environmental conditions
Features Scribed and Laminated Construction
Our long-UV, visible and near-infrared bandpass filters are manufactured using scribed and laminated construction. This method provides a glass-epoxy-glass seal around the perimeter of the filter that prevents the ingress of moisture into the thin-film filter elements. Our manufacturing process employs methods and materials designed to deliver the highest spectral performance while providing a robust construction capable of withstanding variable climatic conditions.
UV Filter Construction
Our UV filters in the 214 nm to 300 nm range are fabricated using our Argon-Gap Technology. These filters demonstrate superior spectral stability and field lifetime in demanding applications such as water purification and environmental monitoring. Argon-Gap technology employs a proprietary sealing process that eliminates sources of solarization by-products, such as epoxy sealants. Solarization by-products, which are created by the chemical breakdown of organic materials resulting from exposure to ultraviolet light, are a principal cause of premature failure of short-UV filters.
Excellent Out-of-Band Blocking
Our filters have excellent out-of-band blocking to less than 0.01% (10-4). Center wavelengths are available from 206 to 900 nm.