The Fresnel Diffraction Pattern of a Circular Aperture at Large Distances.

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Abstract:

A technique for evaluation of the Fresnel diffraction pattern of a circular aperture with obscuration is discussed. The analysis considers Gaussian illumination over the aperture with constant illumination as the limiting case of infinite beam width. A lens correction factor is also applied. Examples of the pattern in the near region and Rayleigh region are given. Examples with lenses with positive and negative focal lengths are also given. All numerical cases considered are for constant illumination. A computer program for the calculation is given in the Appendix. An Addendum comparing these results with the results of another author has been included. Author

Author(s):
Tavis, M. T. ; Chang, N. C.
Author Organization(s):
AEROSPACE CORP EL SEGUNDO CALIF
Descriptive Note:
Rept for Apr-Nov 73,
Pagination:
0065

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-0074(4010-01)-1, SAMSO-TR-74-139
Contract/Grant Number(s):
F04701-73-C-0074
Monitor Series:
TR-74-139
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*Apertures, *Diffraction, Circular, Laser beams, Computer programs
Field(s)/Group(s):
Optics
Keyword(s):
Diffraction patterns, DIFRAC computer program, Fresnal zone
Report Date:
1974 Mar 15