A Study of Image Artifacts Caused By Structured Mid-spatial Frequency Fabrication Errors on Optical Surfaces

Persistent Link:
http://hdl.handle.net/10150/194928
Title:
A Study of Image Artifacts Caused By Structured Mid-spatial Frequency Fabrication Errors on Optical Surfaces
Author:
Tamkin, John M.
Issue Date:
2010
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Aspheric and freeform surfaces are becoming more common as optical designs become more sophisticated and new generations of fabrication tools reduce cost. Unlike spherical surfaces, these surfaces are fabricated with processes that leave a signature or "structure" that is primarily in the mid-spatial frequency region. Tolerancing aspheric and freeform surfaces requires attention to both surface form and structured mid-spatial frequency fabrication errors. These structured surface errors are shown to create image artifacts such as ghosts, and ripples in the MTF profile. Spatial frequencies beyond "form" errors are often ignored or are modeled with statistical descriptors, which do not account for structured errors.This work explores and develops the theory to describe these errors without statistical assumptions. The analytic source of these artifacts in the image Point Spread Function and the Modulation Transfer Function are compared with computational models. The magnitudes of the image artifacts arising from structured surface errors are shown to be non-linear with surface height. It is also shown that multiple structured surface frequencies mix to create sum and difference diffraction orders that are not present in statistical models.An algorithm is developed that enables an optical designer to determine the important spatial frequencies and magnitudes of allowable errors given an MTF performance budget.
Type:
text; Electronic Dissertation
Keywords:
Aspheric surfaces; diffraction theory; mid-spatial frequency; Optical Design; Optical Fabrication; Optical tolerancing
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Optical Sciences; Graduate College
Degree Grantor:
University of Arizona
Advisor:
Milster, Thomas D
Committee Chair:
Milster, Thomas D

Full metadata record

DC FieldValue Language
dc.language.isoENen_US
dc.titleA Study of Image Artifacts Caused By Structured Mid-spatial Frequency Fabrication Errors on Optical Surfacesen_US
dc.creatorTamkin, John M.en_US
dc.contributor.authorTamkin, John M.en_US
dc.date.issued2010en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractAspheric and freeform surfaces are becoming more common as optical designs become more sophisticated and new generations of fabrication tools reduce cost. Unlike spherical surfaces, these surfaces are fabricated with processes that leave a signature or "structure" that is primarily in the mid-spatial frequency region. Tolerancing aspheric and freeform surfaces requires attention to both surface form and structured mid-spatial frequency fabrication errors. These structured surface errors are shown to create image artifacts such as ghosts, and ripples in the MTF profile. Spatial frequencies beyond "form" errors are often ignored or are modeled with statistical descriptors, which do not account for structured errors.This work explores and develops the theory to describe these errors without statistical assumptions. The analytic source of these artifacts in the image Point Spread Function and the Modulation Transfer Function are compared with computational models. The magnitudes of the image artifacts arising from structured surface errors are shown to be non-linear with surface height. It is also shown that multiple structured surface frequencies mix to create sum and difference diffraction orders that are not present in statistical models.An algorithm is developed that enables an optical designer to determine the important spatial frequencies and magnitudes of allowable errors given an MTF performance budget.en_US
dc.typetexten_US
dc.typeElectronic Dissertationen_US
dc.subjectAspheric surfacesen_US
dc.subjectdiffraction theoryen_US
dc.subjectmid-spatial frequencyen_US
dc.subjectOptical Designen_US
dc.subjectOptical Fabricationen_US
dc.subjectOptical tolerancingen_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineOptical Sciencesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorMilster, Thomas Den_US
dc.contributor.chairMilster, Thomas Den_US
dc.contributor.committeememberDallas, Williamen_US
dc.contributor.committeememberRolland, Jannicken_US
dc.identifier.proquest11002en_US
dc.identifier.oclc659754942en_US
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