Increased interest in the ultraviolet portion of the spectrum in recent years has resulted in considerable improvement in interference filters for that area. The purpose of this paper is to describe various types of bandpass filters for use in the 200-nm to 400-nm region. Achievable specifications are presented for signal-to-noise ratio, peak transmittance, depth of blocking, etc., and manufacturing techniques are discussed. Examples are given of general classes of filters used in different areas of the ultraviolet, and specific advantages and disadvantages of each are considered.
John V. Gavin,
"Bandpass Interference Filters For The Ultraviolet", Proc. SPIE 0140, Optical Coatings: Applications and Utilization II, (26 September 1978); doi: 10.1117/12.956274; https://doi.org/10.1117/12.956274