Diagnostics for Light Measuring Devices in Flying-spot Display Measurements

Published

January 31, 2000

Author(s)

Paul A. Boynton, Edward F. Kelley, S. Highnote, R. Hurtado

Abstract

Flying-spot displays, such as some laser projection displays, use a high-energy beam as a light source that scans the image across the display screen. Each pixel can be a narrow, high-energy pulse. When such displays are measured with convential light-measuring devices (LMDs)such as luminance or illuminance meters, there is concern that the LMD may not accurately measure the display light output due to 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 fro an evaluation of LMDs for use in measuring flying-spot displays. This method tests for both integration and saturation errors using a bipartite comparator and a neutral density filter. The construction and procedure of the diagnostic is described. Limitations of the technique as well as sources of error are presented.

Proceedings Title

Projection Displays, Sixth in a Series Conf.

Volume

3954

Conference Dates

January 24-25, 2000

Conference Location

San Jose, CA, USA

Conference Title

SPIE - The International Society for Optical Engineering

Pub Type

Conferences

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Keywords

display measurements, flying-spot displays, laser displays, measurement diagnostics, projection displays

Citation

Boynton, P. , Kelley, E. , Highnote, S. and Hurtado, R. (2000), Diagnostics for Light Measuring Devices in Flying-spot Display Measurements, Projection Displays, Sixth in a Series Conf., San Jose, CA, USA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=13127 (Accessed March 13, 2025)