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    Practical measurement of cell-phone camera lens focal length

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    Author
    Milster, Thomas D.
    Kuhn, William P.
    Affiliation
    Univ Arizona, Coll Opt Sci
    Issue Date
    2020-08-20
    Keywords
    Focal length measurement
    miniature lenses
    cell-phone camera
    
    Metadata
    Show full item record
    Publisher
    SPIE-INT SOC OPTICAL ENGINEERING
    Citation
    Milster, T. D., & Kuhn, W. P. (2020, August). Practical measurement of cell-phone camera lens focal length. In Optical System Alignment, Tolerancing, and Verification XIII (Vol. 11488, p. 1148807). International Society for Optics and Photonics.
    Journal
    OPTICAL SYSTEM ALIGNMENT, TOLERANCING, AND VERIFICATION XIII
    Rights
    © 2020 SPIE.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    A practical instrumentation configuration for measuring focal length of cell-phone camera lenses is presented that uses a custom autocollimator, a grating, an autostigmatic microscope, and a precision stage. Uncertainty in LED wavelength is reduced by using a white LED and a set of narrow-band filters. The autocollimator is designed to allow for rapid focus adjustment at each test wavelength. Examples of the measurement technique and an error analysis are provided.
    ISSN
    0277-786X
    DOI
    10.1117/12.2570622
    Version
    Final published version
    ae974a485f413a2113503eed53cd6c53
    10.1117/12.2570622
    Scopus Count
    Collections
    UA Faculty Publications

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