Hereinafter referred to as bandpass bandpass filter glass glass is a kind of narrow bandwidth, short-wave and long-wave have obvious by the glass, as shown.Their spectral properties by a maximum of transmittance (TM) and its wavelength lambda (M), short wave cutoff wavelength, long wave cutoff wavelength and half width.

        Bandpass wavelength of the maximum transmittance of glass half lambda 1 and lambda (lambda 1 - lambda. 1) the difference between the 2 nm called half width.Shortwave side, short wave cutoff wavelength is in peak wavelength of transmission ratio is equal to zero.Long wave as bo long is long wave in peak side, the wavelength of transmission ratio is equal to zero, some species, in the long side of the glass transmittance reach zero, is expressed in a certain wavelength of transmission ratio.Bandpass glass with Chinese pinyin first letter DTB, named the maximum transmittance of wavelength location value as their serial number.

Band-pass filter glass properties