Quantitative Spectral Measurements in Color Television

Techniques for spectral and colorimetric measurement of a color television system are described. Two measurements are needed to determine whether the transducers will perform as desired in the NTSC system: first, the spectral taking sensitivities of the color cameras or pickup devices and second, the colorimetric characteristics of the display devices. The techniques to be described herein make use of narrow-band optical interference filters used in conjunction with certain "red pass" gelatin filters. Reasonably accurate measurements are obtained from which the colorimetric characteristics of the transducers can be calculated and the over-all color performance determined.