Physics – Optics
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apopt..31.2211l&link_type=abstract
Applied Optics (ISSN 0003-6935), vol. 31, no. 13, May 1, 1992, p. 2211-2222.
Physics
Optics
1
Aberration, Geometrical Optics, Image Processing, Diffraction Patterns, Energy Distribution, Wave Front Deformation
Scientific paper
Zernike polynomials and a set of orthogonal polynomials based on the wave-front slope are used here to study the transition from physical optics to geometrical optics. A knife-edge energy distribution is used to evaluate point images derived from both physical optics and geometrical optics. Parameters obtained from this evaluation are the radius of the major axis and the eccentricity of the irradiance distribution. A direct comparison of geometrical and physical aberrations through tenth order is made based on geometrical-physical spot size, with the magnitude of the aberrations chosen in the transition region between physical and geometrical optics. Spot diagrams and diffraction images are shown side by side to the same scale with the diffraction images matched in exposure. This comparison shows tha spot size, as determined by knife-edge scans, is a consistent measure of image quality for both spot diagrams and diffraction images. Furthermore, spot size is a valid figure of merit down to the diffraction limit.
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