Fig. 4. Energy density variation in a radial direction for the focal plane when = = 1.000 m. zP f1 Fig. 10. Energy density variation in a radial direction for the focal plane when = = 0.200 m. zP f3 Examination of figures (3), (4) and (10) clearly show that the peaks become narrower as becomes larger, that is, the closer the peaks are to the aperture the narrow they m are.
Fig. 4. Energy density variation in a radial direction for the focal plane when zP = f1 = 1.000 m. Fig. 10. Energy density variation in a radial direction for the focal plane when zP = f3 = 0.200 m. Examination of figures (3), (4) and (10) clearly show that the peaks become narrower as m becomes larger, that is, the closer the peaks are to the aperture the narrow they are.
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