Obtaining Color Television Pictures from Space

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: When using a TV system it is desirable to be able to measure selfluminous and non-selfluminous objects, so that the attribute of their appearance known as color can be expressed numerically. Being able to determine the spectral reflectance curve of a rock or other substance on another planet would be very helpful in identifying the material. Surveyor spacecraft, which soft-landed on the lunar surface from 1966 through 1968, have slow-scan 600-line TV systems utilizing a mirror, variable focal-length lens, vidicon tube and a rotating color wheel which holds three primary color filters. The color filters were designed to rotate individually into the optical path of the camera, which necessitated three identical photos being taken, one photo using each of the three color filters. The TV-camera electronics relative-spectral response had to be found before the desired spectral transmittance of the three color filters could be selected. Moreover, the green response had to match the corresponding CIE standard tristimulus value curve because the green response is the basis for defining the photometric unit of luminous flux. Typical color results are discussed.
Publication Date: 1968-09-01
DOI: 10.5594/J16730
Link: https://doi.org/10.5594/J16730
Author(s): Donald T. Heckel, Ronald L. Quandt, L. Harold Allen

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Donald T. Heckel, Ronald L. Quandt, and L. Harold Allen; Obtaining Color Television Pictures from Space, Journal of the SMPTE ( Volume: 77, Issue: 9, September 1968); SMPTE, 1968. Available at https://doi.org/10.5594/J16730

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Donald T. Heckel, Ronald L. Quandt, and L. Harold Allen; Obtaining Color Television Pictures from Space, Journal of the SMPTE ( Volume: 77, Issue: 9, September 1968); SMPTE, 1968. Available at https://doi.org/10.5594/J16730

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<span class="citation">Donald T. Heckel, Ronald L. Quandt, and L. Harold Allen; <cite>Obtaining Color Television Pictures from Space</cite>, Journal of the SMPTE ( Volume: 77, Issue: 9, September 1968); SMPTE, 1968. Available at <a href="https://doi.org/10.5594/J16730" target="_blank" rel="noopener">https://doi.org/10.5594/J16730</a></span>

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Donald T. Heckel, Ronald L. Quandt, and L. Harold Allen; <cite id="bib-10-5594-j16730">Obtaining Color Television Pictures from Space</cite>, Journal of the SMPTE ( Volume: 77, Issue: 9, September 1968); SMPTE, 1968
<span class="doi">10.5594/J16730</span>
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