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Proceedings Paper

Stray darkness: a new error or a previously known error recast?
Author(s): David L. Spooner
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Paper Abstract

Stray light is a commonly known error in spectrophotometer measurements. In that context, it refers to the instrument response to light that is passed by the monochromator or other spectral selective element which is outside the desired bandpass. 'Stray darkness' is a term coined by Michael Goodwin of the Eastman Kodak Company Corporate Metrology Center. He used this term to explain unusual results observed in a measurement study the conducted in which one of the instrument behaved in a way that gave results just the opposite to what would be expected if stray light was present. Goodwin made measurements of commonly used color reference items with instruments made by two manufacturers. He found that differences of the measurements of a Macbeth ColorChecker chart made with the two instruments were relatively small. However, measurements of a set of BCRA tiles often disagreed significantly. These measurement differences were confirmed by making a similar set of measurements using similar instruments. The differences were found to be due, in large measure, to the interaction of one of the measuring instruments with translucent samples.

Paper Details

Date Published: 22 December 1998
PDF: 7 pages
Proc. SPIE 3648, Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts IV, (22 December 1998); doi: 10.1117/12.334563
Show Author Affiliations
David L. Spooner, rhoMetric Associates, Ltd. (United States)

Published in SPIE Proceedings Vol. 3648:
Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts IV
Giordano B. Beretta; Reiner Eschbach, Editor(s)

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