High-Sensitivity HDTV Camera Tube with a HARP Target

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: High-definition television (HDTV) cameras must have a high signal-to-noise ratio (SNR) and considerable depth of focus. Conventional cameras with Saticon® tubes cannot satisfy these two contradictory requirements because the sensitivity of the tubes is insufficient. In order to make a better HDTV handheld camera, a new combination of electron optics and the high-gain avalanche rushing amorphous photoconductor (HARP) target is proposed. A ⅔-in. (18mm) magnetic-focus electrostatic-deflection (MS) system provided with a unique axial-twist pattern-yoke was devised to conform with a HARP target. This resulted in a new camera tube 10 times as sensitive as a conventional tube, an amplitude response (AR) of 30% at 800 TV lines in the ITE AR chart, and good uniform resolution over the entire picture area with no sacrifice in lag or shading.
Publication Date: 1990-09-01
DOI: 10.5594/J02586
Link: https://doi.org/10.5594/J02586
Author(s): N. Egami, T. Yamagishi, S. Okazaki, K. Tanioka, M. Kurashige, K. Oku, S. Ehata

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N. Egami, T. Yamagishi, S. Okazaki, K. Tanioka, M. Kurashige, K. Oku, and S. Ehata; High-Sensitivity HDTV Camera Tube with a HARP Target, SMPTE Journal ( Volume: 99, Issue: 9, September 1990); SMPTE, 1990. Available at https://doi.org/10.5594/J02586

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N. Egami, T. Yamagishi, S. Okazaki, K. Tanioka, M. Kurashige, K. Oku, and S. Ehata; High-Sensitivity HDTV Camera Tube with a HARP Target, SMPTE Journal ( Volume: 99, Issue: 9, September 1990); SMPTE, 1990. Available at https://doi.org/10.5594/J02586

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<span class="citation">N. Egami, T. Yamagishi, S. Okazaki, K. Tanioka, M. Kurashige, K. Oku, and S. Ehata; <cite>High-Sensitivity HDTV Camera Tube with a HARP Target</cite>, SMPTE Journal ( Volume: 99, Issue: 9, September 1990); SMPTE, 1990. Available at <a href="https://doi.org/10.5594/J02586" target="_blank" rel="noopener">https://doi.org/10.5594/J02586</a></span>

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<li>
N. Egami, T. Yamagishi, S. Okazaki, K. Tanioka, M. Kurashige, K. Oku, and S. Ehata; <cite id="bib-10-5594-j02586">High-Sensitivity HDTV Camera Tube with a HARP Target</cite>, SMPTE Journal ( Volume: 99, Issue: 9, September 1990); SMPTE, 1990
<span class="doi">10.5594/J02586</span>
</li>