Take a percolation light glass brief name takes a glass is a kind of bandwidth more narrow, the glass that short-wave and long waves have to close obviously, is shown as diagram.Their spectrum characteristic from shoot biggest value( TM) and its wave-length( the λ M) positions of the ratio deeply, the short-wave closes the wave-length, the long wave closes the wave-length and the half widths to mean.

  Take a glass biggest shoot the half of the ratio deeply to should of wave-length λ 1 be called the half width with 2 its bad value(2 －λs of λ 1) nms of λs.The short-wave closes the wave-length is in the tallest value short-wave side, shoot ratio to be equal to deeply zero of wave-length.The long wave closes the wave-length is in the tallest value long wave side, shoot ratio to be equal to deeply zero of wave-length, some species, shoot the ratio to can not reach deeply in the long wave side glass zero, then shoot ratio to mean deeply with the some wave-length.Take a glass to pronounce the first letter of alphabet ＤＴＢ with the Chinese language to assign name to, be their ordinal number to the wave-length position value that shoots to compare the biggest value deeply.

Wavelength ( mm )

Technial Indexes