R., Nagarajan, Defence Laboratory, Jodhpur, India

• Defence Science Journal Vol 67 No 2: Infrared Technologies - Special Issue Papers
  High Temperature Calibration of Thermal Imagers for Infrared Measurements on Military Platforms
  Abstract  PDF  Fig. 6 Calibration curve of MWIR imager with 200 mm lens for 750 – 1600 °C dynamic range with IT: 330 µs  Fig. 5 Calibration curve of MWIR imager with 50 mm lens for 330 – 630 °C dynamic range with IT: 2000 µs  Fig. 4 Low and high reference temperatures taken at 30% and 70% of dynamic range respectively for performing ‘Two Point’ NUC  Fig. 3 Photon detector response (voltage output) as a function radiant energy  Fig. 2 Experimental setup for calibrating thermal imaging systems  Fig. 1 Schematic of a thermal imaging system  Fig. 7 Calibration curve of LWIR imager with 50 mm lens for 100 – 1600 °C dynamic range with IT: 120 µs  Fig. 8 Calibration curve of LWIR imager with 200 mm lens for 100 – 1600 °C dynamic range with IT: 130 µs  Table-1 Details of dynamic ranges and their corresponding integration times (ITs)
• Defence Science Journal Vol 67 No 2: Infrared Technologies - Special Issue Papers
  Infrared Characterisation and Prediction of Aviation Turbine Fuel Plume
  Abstract  PDF  Fig 1: Experimental Setup for Plume IR measurements  Fig 2: Thermocouple setup for plume temperature measurements  Fig 3: Thermal profile along plume axis in broad- & narrow- bands  Fig 4: Plume radiance profile along plume axis in Narrow & broad bands  Fig 5: Thermal map of ATF plume in different aspect angles  Fig 6: Comparison of the theoretically and experimentally obtained radiance profile  Fig 7: Spectral radiance behaviour along jet axis centre line  Fig 8: Axial transmission profile along the plume axis centre line  Fig 9: Axial radiance distribution along the axis centre line  Fig 10: Angular distribution of predicted Radiance vs. Experimental results (a) Narrow band (b) Broad band  Table 1. Through Plume transmission for IR mapped Tc spot