The IR is an active specialty within the broad scope of optical scienc
es and engineering. In Applied Optics papers are published dealing wit
h such diverse topics as basic concepts in IR technology, including em
issivity, and the theory of IR detection mechanisms as well as the dev
elopment of novel instruments used for IR applications. In this featur
e four papers are presented dealing with recent developments in the IR
. (C) 1996 Optical Society of America