US3101472_page_6

US3101472 | page 6 | https://thedailydialectics.com/pdfs/wipow/US3101472/US3101472.pdf

8,101,472 where R and are "measured in meter. This loss isa diffraction ‘loss which j is caused by the fact that a small portion of the energy bypasses ‘the phase Plates. Since a? log p decreases. with increasing ‘a, the diffraction loss ‘is ‘reduced when “a” is increased; this means when the…