L. Ii, pour une abscisse x de la fibre (repérée par rapport au centre de la surface optique), correspond à la somme sur tout le volume d'intégration de l'intensité oIi, émise par chaque élément de volume oV

=. Pour-y, ,(x) peut s'exprimer comme: avec: -a(u,yo) =0 pour u e: [-XO

. Pour-une-abscisse-x and . Ii, ,(x) est donc égale à l'intensité Ii.,(x,y) réelle émise par les éléments de volume oV(x,y) compris dans le volume d'intégration et "modulée

C. Le and . Selwyn, les profils expérimentaux peuvent être fortement différents des profils réels. La figure B-4 représente schématiquement l'influence de la fonction de transfert sur des profils réels dans le cas d'une fonction de transfert en créneau (physiquement, ce cas correspondrait à un système optique ayant un volume d'intégration de section constante suivant la distance à la surface optique, REFERENCES BIBLIOGRAPHIQUES, 1985.

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