Contents: H. Aben: Integrated photoelasticity and its applications.- A. Lagarde: Modern nondestructive methods of coherent light photoelasticity with applications in two- and three-dimensional problems in statics, contact stresses, fracture mechanics and dynamic impulse.- J.W. Dally: Dynamic photoelasticity and its application to stress wave propagation, fracture mechanics and fracture control.- J.F. Kalthoff: The shadow optical method of caustics.