Visualisation de photographies sur une imprimante rapide d'ordinateur. Application à la simulation de topographies en pose fixe par la méthode de Lang

In the simulation of X-ray section topographs by the means of a computer some problems occur concerning the representation of the photographic image. The grey scales used in the case of electron microscopy may not be applied to the case of X-ray topographs. We have studied a new grey scale and we have adapted the levels of intensity to the specific case of X-rays. Experimental and theoretical results are in good agreement but it is shown that quantitative measurements on photographic plates may be quite delicate.