1. A. Rosencwaig, J. Opsal, V.L. Smith and D.L. Willenborg, Appl. Phys. Lett. 46, 1013 (1985).
2. J. Opsal and A. Rosencwaig, Appl. Phys. Lett. 47, 498 (1985).
3. J. Opsal, in Review of Progress in Quantitative NDE, edited by D.O. Thompson and D.E. Chimenti (Plenum, 1987) p. 217.
4. See for example, M. Born and E. Wolf, Principles of Optics, (Pergamon, 1965) p. 38.
5. S. Wurm, P. Alpern, D. Savignac and R. Kakoschke, Appl. Phys. A 47, 147 (1988).