• Login
    View Item 
    •   Home
    • UA Graduate and Undergraduate Research
    • UA Theses and Dissertations
    • Master's Theses
    • View Item
    •   Home
    • UA Graduate and Undergraduate Research
    • UA Theses and Dissertations
    • Master's Theses
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Replicating the Blue Wool Response Using a Smartphone Spectroradiometer

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    azu_etd_15667_sip1_m.pdf
    Size:
    26.30Mb
    Format:
    PDF
    Download
    Author
    Ulanch, Rachel N.
    Issue Date
    2017
    Keywords
    Conservation
    Optical Engineering
    Textile Lightfastness
    Advisor
    Koshel, R. John
    
    Metadata
    Show full item record
    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.
    Embargo
    Release after 04-Feb-2018
    Abstract
    A spectroradiometer was developed using the rear camera of the Samsung S7 smartphone for replicating the response of blue wool, a light comparative fading test from the textile industry that was adopted by the art conservation community in the 1960s. This technique was regarded as a cost effective, readily available comparative standard for understanding lightfastness of museum objects, but not an end all solution. Many other solutions have been found since the suggestion of the blue wool standard. Including the Canadian Light Damage Calculator and Lightcheck® ,which are comparator guides for lighting museum objects. The Berlin model for comparing tested spectral data is taken with expensive equipment, to a database to determine an objects sensitivity. Microfadeometry that directly tests the object with a 0.4-mm diameter focused Xenon source that deteriorates the artwork. None however have been able to completely replace the vetted, cost effective, easy to use blue wool standard for determining the sensitivity of museum and gallery objects, but a solution is needed. The solution is a designed and tested smartphone spectroradiometer attachment that measures the illumination and reflectance spectrum of museum and gallery objects to deduce an absorption spectrum that can be correlated to an expected blue wool response under the same conditions. The attachment for the phone is made from off the shelf and 3D printed parts. It has measured the deterioration of blue wool under a high intensity source and can predict the expected time for a blue wool specimen to visibly fade under the illumination of museum LED lighting. This thesis covers the design, modeling and testing experiment for the smartphone spectroradiometer that currently has a resolution of ± 7 nm, a spectral range from 393 to 650 nm with five orders of magnitude and an absolute radiometric error of 27.5% with the possibility of room for improvement. This includes increasing the accuracy of the modeled spectrum of the sun used for calibration, applying more advanced noise removal techniques, applying filters in post processing for better resolution and of course using a smartphone that takes raw images and can have its optical image stabilizer turned off during manual mode.
    Type
    text
    Electronic Thesis
    Degree Name
    M.S.
    Degree Level
    masters
    Degree Program
    Graduate College
    Optical Sciences
    Degree Grantor
    University of Arizona
    Collections
    Master's Theses

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.