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Proceedings Paper

Diagnostics for light-measuring devices in flying-spot display measurements
Author(s): Paul A. Boynton; Edward F. Kelley; Susan M. Highnote; Randy Hurtado
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Paper Abstract

Flying-spot displays scan an image across the display screen using a high-energy beam. Each pixel can be a narrow, submicrosecond pulse. When such displays are measured with conventional light-measuring devices (LMDs), such as luminance or illuminance meters, there is concern that the LMD may not accurately measure the display light output because of the unique characteristics of the source. The LMD may be unable to properly integrate the narrow pulses, or the high-energy signal may saturate the detector. As in all areas of metrology, it is essential to verify that the instruments used are providing the desired information. A diagnostic has been developed that allows for an evaluation of LMDs for use in measuring flying-spot and similar displays. This method tests for both integration and saturation errors using a bipartite comparator and a neutral density filter. Errors resulting from the saturation of the LMD by the flying-spot display are demonstrated. The construction and procedure of the diagnostic is described. Limitations of the technique as well as sources of error are presented.

Paper Details

Date Published: 25 April 2000
PDF: 10 pages
Proc. SPIE 3954, Projection Displays 2000: Sixth in a Series, (25 April 2000); doi: 10.1117/12.383383
Show Author Affiliations
Paul A. Boynton, National Institute of Standards and Technology (United States)
Edward F. Kelley, National Institute of Standards and Technology (United States)
Susan M. Highnote, Highnote Enterprises (United States)
Randy Hurtado, Laser Power Research (United States)

Published in SPIE Proceedings Vol. 3954:
Projection Displays 2000: Sixth in a Series
Ming Hsien Wu, Editor(s)

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