Back to articles
General Papers
Volume: 43 | Article ID: art00012
Image
The Measurement of Diffuse Optical Densities. Part II: The German Standard Reference Densitometers
  DOI :  10.2352/J.ImagingSci.Technol.1999.43.4.art00012  Published OnlineJuly 1999
Abstract

This article describes the design and performance of two densitometers used for high-accuracy measurements of visual diffuse optical transmission densities. The two densitometers were developed and constructed at the Physikalisch-Technische Bundesanstalt (PTB), the German National Institute of Metrology. Both devices comply with the ISO standards 5-2 and 5-3 and are primarily used for the calibration of standard step tablets. One of these densitometers, the PTB's inverse square law densitometer, is the national standard reference densitometer capable of measuring with high accuracy optical densities up to D = 3.3. The other densitometer, called fiber densitometer, measures densities up to D = 6. For both densitometers, the expanded ISO uncertainty of density measurement (coverage factor k = 2) is 0.003 for densities below 1.5 and increases to 0.006 at density 6 for the fiber densitometer with spectrally neutral samples.

Subject Areas :
Views 18
Downloads 1
 articleview.views 18
 articleview.downloads 1
  Cite this article 

E. Buhr, D. Hoeschen, D. Bergmann, "The Measurement of Diffuse Optical Densities. Part II: The German Standard Reference Densitometersin Journal of Imaging Science and Technology,  1999,  pp 382 - 387,  https://doi.org/10.2352/J.ImagingSci.Technol.1999.43.4.art00012

 Copy citation
  Copyright statement 
Copyright © Society for Imaging Science and Technology 1999
  Login or subscribe to view the content