Spatial-Frequency Encoding Techniques Applied to a One-Tube Color Television Camera
Albert Macovski · IEEE Transactions on Broadcasting · 1970
An analysis and experimental results are presented of a new color camera technique using a single camera tube. To avoid the difficult registration problem of conventional color cameras, the color information is encoded as the amplitude of two diffraction grating patterns. This is accomplished by imaging the colored scene onto a pair of colored diffraction gratings. The recovery of the color information is done by bandpass filtering of each channel followed by envelope detection. The three color signals are derived using linear combinations of the two decoded carriers along with the average signal, which represents a weighted sum of all three colors.