Fabrication of chalcogenide glass rods and tubes by processor-controlled extrusion techniques

AMI is engaged in a number of programs to produce infrared transmitting fiber and lenses using AMTIRR materials, for commercial and military purposes. Through adaptation of Computer Engineering Services (author's prior company) conventional silicate glass extrusion technology, it is possible to fabricate fire polished rods and tubes of virtually any cross-sectional geometry. Diameters between about 3 mm and 75 mm and lengths as great as 1000 mm have been achieved. Extrusion is similar in many respects to fiber optic draw technology and requires precise control of feed and draw parameters, via the use of microprocessor systems. Internal homogeneity of the starting material is completely retained. This paper discusses the effort to date and describes product applications.