Page 10 - Chalcogenide Glasses for Infrared Optics

Co n t e n t s ix

6.5 Volume Production . . . . . . . . . . . . . . . . . . . . . 146
6.6 Problem of Refractive Index Change
When Pressure Molding . . . . . . . . . . . . . . . . . 148
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
7 Glass Processes for Other Applications . . . . . . . . . 153
7.1 AMI as Supplier of Chalcogenide Glasses
for IR Fibers . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
7.2 AMI Fiber Drawing Process . . . . . . . . . . . . . . 158
7.3 Chemical Applications of AMI IR Fiber . . . . 168
7.3.1 Fiber Summary . . . . . . . . . . . . . . . . . . 173
7.4 Extrusion of Chalcogenide Glasses . . . . . . . . 174
7.4.1 Glass Extrusion Summary . . . . . . . . . 178
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

8 IR Imaging Bundles Made from Chalcogenide
Glass Fibers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
8.1 The Stacked Ribbon Method . . . . . . . . . . . . . 181
8.2 IR Imaging Bundles of 1-m Length . . . . . . . . 184
8.3 Goals of the Navy SBIR 10-m IR Imaging
Bundle Program . . . . . . . . . . . . . . . . . . . . . . . . 191
8.4 The Navy Phase II 27-Month Program . . . . 192
8.4.1 The 1-m C2 Imaging Bundles . . . . . . 192
8.4.2 AMI Glass Clad Fibers . . . . . . . . . . . . 194
8.4.3 AMI Production of High-Purity
Arsenic Trisulfide Glass . . . . . . . . . . . 194

8.4.4 The 50 Percent Transmission Goal . . . 196
8.4.5 Formation of Bundles on the
10-m Drum . . . . . . . . . . . . . . . . . . . . . 199
8.4.6 Optical Evaluation of 10-m
Imaging Bundles . . . . . . . . . . . . . . . . . 204
8.5 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210

9 AMI Infrared Crystalline Materials . . . . . . . . . . . . . 211
9.1 Cadmium Telluride . . . . . . . . . . . . . . . . . . . . . 211
9.2 Previous Work at TI . . . . . . . . . . . . . . . . . . . . 212
9.2.1 Conclusions Concerning This Effort . . 214
9.3 AMI DARPA-Funded Large Plate Process . . . 215
9.3.1 Conclusions . . . . . . . . . . . . . . . . . . . . . 221
9.4 Vacuum Float Zoned Silicon Detector
Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
9.5 Silicon as an Infrared Optical Material . . . . 225
9.6 Single-Crystal Silicon Fibers . . . . . . . . . . . . . 228
9.7 Gallium Arsenide as an Infrared
Optical Material . . . . . . . . . . . . . . . . . . . . . . . . 230