Computer-Controlled Photometry And Large-Screen Display Resolution

Waldo R. Robinson

doi:10.1117/12.957963

15 November 1979 Computer-Controlled Photometry And Large-Screen Display Resolution

Waldo R. Robinson

Proceedings Volume 0196, Measurements of Optical Radiations; (1979) https://doi.org/10.1117/12.957963
Event: 23rd Annual Technical Symposium, 1979, San Diego, United States

Abstract

A new method for measuring the resolution and contrast of calligraphic projection displays has been developed at NOSC (Naval Ocean Systems Center). The technique involves the use of a computer controlled photometer and a X-Y plotter. The plotter is normally used to give hard copy records of the photometric data obtained from spectral or spatial scans and subsequently stored in the memory of the controlling computer. In this application the photometric sensor, a miniature integrating sphere with a slit aperature, is mounted on the X-Y plotter pen holder which is in turn moved according to programmed instructions from the computer. With the X-Y plotter positioned vertically in front of a projection display, the projected brightness is measured and stored in the computer memory as a function of sensor position. The spatial displacement between measurements is under operator control and can be in increments as small as one thousandth of an inch. After the data is stored in the computer memory, it is then made into hard copy with the X-Y plotter in one of several plotting modes. From this hard copy the display performance parameters of resolution and contrast can be extracted. The different plotting modes are used to enhance various differences when more than one scan is recorded on the same chart.

Citation Download Citation

Waldo R. Robinson "Computer-Controlled Photometry And Large-Screen Display Resolution", Proc. SPIE 0196, Measurements of Optical Radiations, (15 November 1979); https://doi.org/10.1117/12.957963

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