Measuring Camera-Tube Resolution with the RCA P200 Test Chart
1980; Society of Motion Picture and Television Engineers; Volume: 89; Issue: 2 Linguagem: Inglês
10.5594/j00524
ISSN0036-1682
Autores Tópico(s)Industrial Vision Systems and Defect Detection
ResumoThe RCA P200 test chart was developed to eliminate most of the variables involved in the process of measuring the resolution capabilities of a television camera tube. The test pattern produces measurements that are relatively independent of video-amplifier frequency response and eliminates signal variation or test-pattern brightness variations across the tube as a factor in the measurements. The pattern facilitates beam focus to assure minimum astigmatism and analysis of the astigmatism present in the system at the best focus. The use of narrow-band video-amplifier response in conjunction with this pattern greatly reduces noise and increases the accuracy of measurements. The P200 test chart also allows accurate measurement of the resolution of tubes with very high resolution characteristics.
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