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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

Image formation in coronagraphs due to mirror polarization aberrations

Chipman, Russell A. 27 November 2017 (has links)
The PSF for astronomical telescopes and instruments depends not only on geometric wavefront aberrations, but also on those polarization aberrations from the polarization properties of reflecting and transmitting surfaces. The image plane irradiance distribution is the linear superposition of four PSF images: one for each of the two orthogonal polarizations and one for each of two cross-coupled polarization terms.

Problems in null corrector design

Lytle, John D. January 1969 (has links)
No description available.

Methods for null testing sections of aspheric surfaces

Ruda, Mitchell Curtis January 1979 (has links)
No description available.

Aberration sensitivity reduction of alternating phase-shifting mask in photolithography

Mak, Yick-hong, Giuseppe. January 2004 (has links)
Thesis (M. Phil.)--University of Hong Kong, 2005. / Title proper from title frame. Also available in printed format.

Über den einfluss der erdbewegung auf die verteilung der intensität der licht- und wärmestraglung ...

Nordmeyer, Paul. January 1903 (has links)
Inaug.-diss.--Bonn. / Lebenslauf.

Simple four-mirror anastigmatic systems with at least one infinite conjugate : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy in the University of Canterbury /

Rakich, Andrew. January 1900 (has links)
Thesis (Ph. D.)--University of Canterbury, 2007. / Typescript (photocopy). "April 2007." Includes bibliographical references. Also available via the World Wide Web.


Olinger, Dale Kent January 1983 (has links)
No description available.

Spherical Aberration Gauge for the Human Visual System

Pixton, Bruce January 2009 (has links)
Spherical aberration limits the ability of a human eye to form a clear image. The amount of Spherical Aberration found in a given eye is different across a population and is actively changing as a function of accommodation, light level, and age. Any attempt made to correct spherical aberration will need to have an accurate understanding of what the appropriate correction should be. Objective measurement of the Spherical Aberration inherent to the eye's optical systems helps to answer part of the question, but there are other factors in the human visual system, such as processing in the brain that affect what is "seen". Hence, a vision correction approach based purely on objective measurement of the eye's aberrations may not necessarily correspond to better vision. The Spherical Aberration Gauge has been developed to allow subjects to deter- mine for themselves the appropriate amount of correction required. The Gauge is designed to allow users to view an eye chart or scene while adjusting the amount of spherical aberration being introduced. It produces a wide range of spherical aberration levels from which a user can determine a single level that provides best vision. The amount selected by the user is considered a subjective spherical aberration correction and can then be applied to standard vision correction devices or procedures. This project attempts to bridge the gap between what is known about ocular spherical aberration and how the brain interprets the correction. The outcome of this project is to provide a tool that identifies the preferred amounts of spherical aberration correction and that gives insight from subjective feedback on the visual benefit thereof.

Coded aperture imaging on nonplanar surfaces

Atcheson, Paul Donald, 1952- January 1976 (has links)
No description available.

Aberrational analysis of optical systems: a proximate ray trace approach

Hopkins, George W., 1947- January 1976 (has links)
No description available.

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