Narrowband filters

Bandpass filters are an important class of optical thin film components that are widely used in spectroscopy, lasers, optical fiber communications, and other fields. According to spectral characteristics, bandpass filters are broadly divided into broadband filters and narrowband filters. Filters with a relative half-width of not less than 20% are usually called broadband filters, and filters with a relative half-width of less than 5% are called narrowband filters.

General parameters