The uses of various optical methods in forensic science are briefly reviewed—in particular, visual examination, microscopy, x-rays and photography, x-ray diffraction, spectrophotometry, emission spectrography, and neutron activation analysis. Attention is directed to some recent developments, particularly in the methods of bloodstain examination.
H. J. Walls, "Forensic Optics," Appl. Opt. 8, 21-28 (1969)