The importance of testing IR imagers and missile seekers with realisti
c IR scenes warrants a review of the current technologies used in dyna
mic infrared scene projection. These technologies include resistive ar
rays, deformable mirror arrays, mirror membrane devices, liquid crysta
l light valves, laser writers, laser diode arrays, and CRTs. Other met
hods include frustrated total internal reflection, thermoelectric devi
ces, galvanic cells, Bly cells, and vanadium dioxide. A description of
each technology is presented along with a discussion of their relativ
e benefits and disadvantages. The current state of each methodology is
also summarized. Finally, the methods are compared and contrasted in
terms of their performance parameters.