Tag - category of optical filters

A Brief Introduction of Optical Filters——Part Ⅱ Types of Optical Filters

There are different classification method of filters. It can be classified according to spectral band, spectral types, bandwidth, wavelength, features of coating, industry application etc. The following will introduce two common classification ways. 1.Classified according to spectral band According to the length of spectrum, filters can be divided into ultra violet filters, visible light filters, near infrared filters, infrared filters and far infrared filters. The wavelengths are listed as follows: Ultra violet filters—180~400nm Visible light filters—400~700nm Near infrared filters—700~3000nm Infrared filters—over 3000nm~10μm Far infrared filters—15~1000μm  2.Classified according to [...]