Phase compensation of an aberrating medium can be achieved with image holography and a rotating diffuser in the recon-struction beam to average speckle noise. We show that the image hologram can also be used in the object plane to achieve the same result. Both amplitude and phase holograms can be used in these experiments. The results were achieved with a three-dimensional phase aberration so that longitudinal magnification and depth-of-focus effects limited the quality of the reconstructed image. With three-dimensional aberrators, one must be careful of the exact location of the image plane when recording the hologram and its placement in the reconstruction process.

Holographic FLI technique provides a means of reducing fringe clutter noise. Holographic interferometry measures position changes of the order of the wavelength of the light used. Moire techniques provide a means of desensitizing holographic interferometry. Moire techniques may be employed with FLI with the objective of automating the defect detection process. It may be necessary to employ a spatial frequency filtering step to remove fringe clutter noise.

One of the ways that the human body maintains constant temperature is by exchange of radiant energy between the skin and objects in the immediate, environment. In 1957, Lawson observed. that cancer can alter the pattern of emission of thermal energy from the female breast.' This observation stimulated a number of studies of thermographic detection of breast cancer and a number of ,publications with contradictory conclusions regarding the effectiveness of thermographic techniques., To some degree, these contradictions probably reflect inadequate experience of persons interpreting, thermographic images, and improper ambient conditions such as asymmetrical air flow during the thermographic examination.