Diagnostics for light-measuring devices in flying-spot display measurements

Paul A. Boynton; Edward F. Kelley; Susan M. Highnote; Randy Hurtado

doi:10.1117/12.383383

25 April 2000 Diagnostics for light-measuring devices in flying-spot display measurements

Paul A. Boynton, Edward F. Kelley, Susan M. Highnote, Randy Hurtado

Proceedings Volume 3954, Projection Displays 2000: Sixth in a Series; (2000) https://doi.org/10.1117/12.383383
Event: Electronic Imaging, 2000, San Jose, CA, United States

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.

Citation Download Citation

Paul A. Boynton, Edward F. Kelley, Susan M. Highnote, and Randy Hurtado "Diagnostics for light-measuring devices in flying-spot display measurements", Proc. SPIE 3954, Projection Displays 2000: Sixth in a Series, (25 April 2000); https://doi.org/10.1117/12.383383

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