Focal shift in converging annular beam. A corollary.

Details Focal shift in converging annular beam. A corollary. Focal shift in converging annular beam. A corollary.

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jopt...20..141k&link_type=abstract

Journal of Optics (Paris), Vol. 20, No. 3, p. 141 - 144

Physics

Optics

3

Apodization

Scientific paper

Using the Fresnel diffraction integral an exact expression is derived for the on axis intensity distribution of focussed annular beam. It is found that the ratio of the shift "Δf", of the maximum intensity to the distance "f" between the geometrical focus and the plane of the aperture depends not only on the Fresnel number Fl of the focussing lens but also on the central obstruction. The effect becomes significant for large obstruction ratios.

Affiliated with

Also associated with

No associations

Rating

Focal shift in converging annular beam. A corollary. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Focal shift in converging annular beam. A corollary., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Focal shift in converging annular beam. A corollary. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1855776