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Proceedings Paper

Considerations On Wavelength Scaling For Optical Systems
Author(s): Petras V. Avizonis
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Paper Abstract

Normally when one considers the intensity in the far field and how it scales with wavelength, a very quick and superficially simple answer is reached. Namely, the answer is that far field intensity scales inversely as wavelength squared, i.e., I(λ1)/I(λ2) = (λ2/λ1)2. Unfortunately, this relationship is only true for what is called the "on-axis intensity" of the central diffraction lobe. In most cases the interest is not to deliver a central intensity to the far field, but to deliver a maximum amount of power within a defined spot size in the far field. This spot size is normally defined to be within the first zero of the Airy pattern, or the exp (-2) point on a Gaussian intensity distribution. The purpose of this article is to examine how the far field average irradiance rather than on-axis intensity scales with wavelength, and how simple aberrations affect such average irradiance.

Paper Details

Date Published: 7 November 1983
PDF: 8 pages
Proc. SPIE 0380, Los Alamos Conf on Optics '83, (7 November 1983); doi: 10.1117/12.934808
Show Author Affiliations
Petras V. Avizonis, Air Force Weapons Laboratory (United States)


Published in SPIE Proceedings Vol. 0380:
Los Alamos Conf on Optics '83
Robert S. McDowell; Susanne C. Stotlar, Editor(s)

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