Control of infrared radiation

THE CHARACTERISTICS of commonly used infrared sources have been rather well delineated in the past,1,2 so that the quantity and quality of their radiant outputs need not be covered in this paper. Generally speaking, these sources have one or two dimensions, represented by point sources, line sources, and area sources. All are basically omnidirectional, and their utilization is dependent on some form of optical control, both individually and when combined to form an oven.