Ultra-narrowband optical bandpass filters with large format and improved temperature stability

Sophisticated monitor and deposition methods enable multi-cavity narrowband filters that push the envelope of performance. Hard coated ultra-narrowband optical filters made using modern plasma processes offer much improved transmission, temperature stability and out of band blocking as compared to legacy soft coatings. These filters are used in optical systems as diverse as LIDAR (light detection and ranging), Doppler shift detection of plasma velocity, laser cleanup, chemical and gas sensing, as well as for cutting-edge astronomy and instrumentation applications. Ultra-narrowband filters