Title
Tolerance On Defocus Precisely Locates The Far Field (Exactly Where Is That Far Field Anyway?)
Abstract
The Fraunhofer criterion defines the location of the boundary between the Fresnel and the Fraunhofer diffraction regions and thus determines the location of that region commonly referred to as the far field. The Fraunhofer criterion is usually given as an axial distance much greater than some amount relative to the maximum dimension of the aperture. By recognizing that Fresnel diffraction patterns are merely defocused Fraunhofer diffraction patterns, we show that the Fraunhofer criterion can be written precisely in terms of an allowable tolerance on defocus. This new criterion provides insight that is useful to optical designers and engineers who routinely deal with such tolerances. © 2002 Optical Society of America.
Publication Date
5-1-2002
Publication Title
Applied Optics
Volume
41
Issue
13
Number of Pages
2586-2588
Document Type
Article
Personal Identifier
scopus
DOI Link
https://doi.org/10.1364/AO.41.002586
Copyright Status
Unknown
Socpus ID
0036575167 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/0036575167
STARS Citation
Harvey, James E.; Krywonos, Andrey; and Bogunovic, Dijana, "Tolerance On Defocus Precisely Locates The Far Field (Exactly Where Is That Far Field Anyway?)" (2002). Scopus Export 2000s. 2571.
https://stars.library.ucf.edu/scopus2000/2571