(Chapter Headings): Blackbody Radiation, Image Plane Intensity, and Units. Interaction of Radiation with Matter. Absorption, Emission, and Lasers. The Semiconductor Laser. The Ideal Photon Detector and Noise Limitations on Optical Signal Measurement. Real Detectors; Vacuum Photodiode and Photomultiplier, Photoconductor, Junction Photodiode, Avalanche Photodiode. Heterodyne or Coherent Detection and Optical Amplification. Systems I: Radiometry, Communications, and Radar. SystemsII: Imaging. References. Appendix: Problem Solutions. References. Subject Index.