Resolution Capability of the Image-Orthicon Camera Tube Under Nonstandard Scan Conditions

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 72, No. 10, pp. 771–786
Abstract: The resolution properties of the image orthicon have been studied experimentally for nonstandard scanning rates applicable in scientific observation. Resolution may be improved by (1) raising the photocathode voltage, (2) separating the exposure and scanning operations in time so as to minimize the effect of leakage of scan fields into image section, (3) cooling the target and (4) scanning slowly without reduction of bandwidth. When operated as suggested with highlights near the “knee,” the 3-in. image orthicon has an amplitude response of 50% at 900 TV-lines and a limiting resolution of about 1500 TV-lines. With increased illumination a limiting resolution of 3000 TV-lines (60 line-pairs/mm) is attained. Maximum resolution is set by capacitive coupling between elements at the target. Response to stellar or point source images is discussed. Measurement techniques and the sine-wave response of test lenses are given.
Publication Date: 1963-10-01
DOI: 10.5594/J06135
ISSN: Print: 0361-4573
Link: https://doi.org/10.5594/J06135
Author(s): William C. LivingstonKitt Peak National Observatory, 950 North Cherry Avc., Tucson, Ariz.
William C. LivingstonKitt Peak National Observatory, 950 North Cherry Avc., Tucson, Ariz.
Copyright: © 1963 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

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Sensitivity and Motion Capturing Ability of Television Camera Tubes [Active]
A Method of Measuring the Optical Sine-Wave Spatial Spectrum of Television Image Display Devices [Active]
Military Uses of Television: Pickup Tube Performance with Slow Scanning Rates [Active]
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William C. Livingston and William C. Livingston; Resolution Capability of the Image-Orthicon Camera Tube Under Nonstandard Scan Conditions, Journal of the SMPTE ( Volume: 72, Issue: 10, October 1963); SMPTE, 1963. Available at https://doi.org/10.5594/J06135

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William C. Livingston and William C. Livingston; Resolution Capability of the Image-Orthicon Camera Tube Under Nonstandard Scan Conditions, Journal of the SMPTE ( Volume: 72, Issue: 10, October 1963); SMPTE, 1963. Available at https://doi.org/10.5594/J06135

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<span class="citation">William C. Livingston and William C. Livingston; <cite>Resolution Capability of the Image-Orthicon Camera Tube Under Nonstandard Scan Conditions</cite>, Journal of the SMPTE ( Volume: 72, Issue: 10, October 1963); SMPTE, 1963. Available at <a href="https://doi.org/10.5594/J06135" target="_blank" rel="noopener">https://doi.org/10.5594/J06135</a></span>

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William C. Livingston and William C. Livingston; <cite id="bib-10-5594-j06135">Resolution Capability of the Image-Orthicon Camera Tube Under Nonstandard Scan Conditions</cite>, Journal of the SMPTE ( Volume: 72, Issue: 10, October 1963); SMPTE, 1963
<span class="doi">10.5594/J06135</span>
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Referenced By

The Capabilities and Prospects of Television Camera Tubes in Applications for Astronomy [Active]