Journal of the Society of Motion Picture Engineers (1930-1949)

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634 BLOUNT These are added to the general illumination that establishes the signal level. 4. Distortion of color rendering should be reduced by the use of niters at the camera and by the selection of light sources whose spectral-energy distribution most nearly complements the sensitivity of the camera tube and results in a combined response that approximates the luminosity curve of the eye. REFERENCES (1) Peter Goldmark, "Brightness and contrast in television," Elec. Eng., vol. 68, pp. 237-242; March, 1949. (2) Otto H. Schade, "Electro-optical characteristics of television systems," RCA Rev., vol. 9, pp. 5-37; March, 1948. (3) W. F. Forsythe and E. Q. Adams, "Radiating characteristics of tungsten and tungsten lamps," J. Opt. Soc. Amer., vol. 35, pp. 108-113; February, 1945. (4) Lloyd A. Jones, "Light niters, their characteristics and applications in photography," Trans. SMPE, vol. 11, no. 30, pp. 135-181; 1927.