Diffraction efficiency and aberrations of diffractive elements obtained from orthogonal expansion of the point spread function

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

The Point Spread Function (PSF) indirectly encodes the wavefront aberrations of an optical system and therefore is a metric of the system performance. Analysis of the PSF properties is useful in the case of diffractive optics where the wavefront emerging from the exit pupil is not necessarily continuous and consequently not well represented by traditional wavefront error descriptors such as Zernike polynomials. The discontinuities in the wavefront from diffractive optics occur in cases where step heights in the element are not multiples of the illumination wavelength. Examples include binary or N-step structures, multifocal elements where two or more foci are intentionally created or cases where other wavelengths besides the design wavelength are used. Here, a technique for expanding the electric field amplitude of the PSF into a series of orthogonal functions is explored. The expansion coefficients provide insight into the diffraction efficiency and aberration content of diffractive optical elements. Furthermore, this technique is more broadly applicable to elements with a finite number of diffractive zones, as well as decentered patterns.

Original languageEnglish (US)
Title of host publicationOptical Modeling and Performance Predictions VIII
PublisherSPIE
Volume9953
ISBN (Electronic)9781510602984
DOIs
StatePublished - 2016
EventOptical Modeling and Performance Predictions VIII - San Diego, United States
Duration: Aug 31 2016Sep 1 2016

Other

OtherOptical Modeling and Performance Predictions VIII
CountryUnited States
CitySan Diego
Period8/31/169/1/16

Keywords

  • Diffraction efficiency
  • Diffractive lenses
  • Orthogonal expansion
  • Point spread function

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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