PARTIALLY COHERENT IMAGING WITH SCHELL-MODEL BEAMS

The agreement between the general description of imaging with quasimon ochromatic spatially partial coherent optical fields and the concept o f the Schell-model beam is analysed, Radiator pairs of object Schell-m odel beams at the entrance window of the imaging system yield interfer ograms with different periods, visibilities and fringe orientation ont o the entrance pupil, whose superposition determines the intensity dis tribution there. Furthermore, the structure of the optical field in th e entrance pupil will be modified by the properties of the imaging sys tem through their transfer to the exit pupil, Radiator pairs in the ex it pupil generate interferograms onto the exit window, whose superposi tion yields the image intensity distribution, In the case of ideal ima ging, the optical field in the exit window will also be constituted by image Schell-model beams, which are a scaled, inverted and proportion al version of the object Schell-model beams, and the superposed interf erograms in the exit window will be Young's interferograms. (C) 1997 E lsevier Science Ltd.