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

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S-l RESPONSE AT 3000 °K -I RESPONSE AT 2500° K 600 800 WAVELENGTH (millim icrons ) 1000 Fig. 3. Effect of tungsten light source color temperature change. 3.0 1. Interference Filter 2. Interference Filter plus Wratten 38A 400 600 800 WAVELENGTH (millim icrons) 1000 92 Fig. 4. Spectral density characteristic of one type of interference filter. August 1952 Journal of the SMPTE Vol. 59