Self-Blocking SWIR Filters
Apr 2012Optics Balzers AGRequest Info
Optics Balzers AG offers customized bandpass filters with a self-blocking design for the short-wavelength infrared (SWIR) spectral region. The filters combine a wide blocking range and high bandpass transmittance in a single all-dielectric interference coating. All filters are deposited by in situ monitored plasma-assisted sputter and evaporation processes, and show high stability in terrestrial and space environments. The company also offers compatible broadband dichroic beamsplitters. SWIR optical sensing applications in the spectral region between 900 and 3000 nm require filters with high transmittance in the passband, blocking ranges over the full detector response, and long-term shift-free spectral performance with good environmental stability. Applications include optical remote sensing of the Earth from air and space; near-infrared, Raman and emission spectroscopy; plasma diagnostics; and blood analysis.