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VERIFICATION OF LIGHT-SOURCE UNIFORMITY IN A PORTABLE SETUP FOR DIGITAL CAMERA CHARACTERIZATION

Édilla M. Gonçalves Fernandes, Henrique C. de Campos Glória, Davies W. de Lima Monteiro, Luiz F. Etrusco Moreira
  • Abstract:
    This work presents a flexible, low-cost and portable setup that allows the characterization of digital cameras based on the EMVA 1288 standard. Instead of using expensive equipment as an integrating sphere, we propose a properly evaluated simple light source based on a translucent glass surface. To make this possible it is necessary to understand the uniformity aspects of this surface and to map its interference by means of a characterization procedure. The method proposed basically subtracts the non- uniformity map of the original light source allowing its use as a flat field surface.
    An optical setup was developed to extract data for the uniformity verification. It is basically composed by a digital camera, a frosted-surface light source, an extension tube and a translation stage. Some preliminary results are presented showing the validity of this approach.
  • Keywords:
    EMVA1288, standardization, translucent surface, uniformity, homogeneity, characterization, digital cameras, flat-field luminance
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  • DOI:
    _unreg_tc4-2011.013

Event details:

  • IMEKO TC:
    TC4
  • Event name:
    TC4 Symposium 2011
  • Title:

    XVIIIth IMEKO TC4 International Symposium on Measurement of Electrical Quantities (part of Metrologia2011, together with IX International Congress on Electrical Metrology - IX SEMETRO)

  • Place:
    Natal, BRAZIL
  • Time:
    27 September 2011 - 30 September 2011