OSA's Digital Library

Applied Optics

Applied Optics


  • Vol. 13, Iss. 11 — Nov. 1, 1974
  • pp: 2585–2588

Computation of RMS Spot Radii by Ray Tracing

J. W. Foreman, Jr.  »View Author Affiliations

Applied Optics, Vol. 13, Issue 11, pp. 2585-2588 (1974)

View Full Text Article

Enhanced HTML    Acrobat PDF (404 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



In a ray trace calculation of the rms radius of the spot formed in the image plane of an optical system by a point source object, a decision must be made as to how many rays will be traced to obtain the result. As the number of rays is increased, the rms spot radius is generally found to decrease, apparently approaching a definite lower limit as the number of rays becomes very large. This paper examines the question of how many rays must be traced and what their geometrical distribution within the aperture should be to approach the limiting value of the rms spot radius for an infinite number of rays within an accuracy of approximately 1%.

© 1974 Optical Society of America

Original Manuscript: February 1, 1974
Published: November 1, 1974

J. W. Foreman, "Computation of RMS Spot Radii by Ray Tracing," Appl. Opt. 13, 2585-2588 (1974)

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


Fig. 1 Fig. 2 Fig. 3

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited