High Performance Blocking Filters for the Region 1µm to 20µm

J S Seeley, S D Smith

Applied Optics, Vol. 5, No. 1 (1966)

Abstract

A set of filters based on the sequence of semiconductor edges is described which offers continuity of short-wave infrared blocking. The rejection throughout the stop region is greater than 10-3 for each filter and the transmission better than 70% through one octave with a square cut-off. The cut-off points are located at intervals of about two-thirds of an octave. Filters at 2.6µm, 5.5µm, and 12µm which use a low-passing multilayer in combination with a semiconductor absorption edge are described in detail. The design of multilayers for optimum performance is discussed by analogy with the synthesis of electric circuit filters.

Things to do now

Contact us

Page navigation

 

Search Form

A-Z lists