Color Simplifies Chart (Jan, 1948)
Color Simplifies Chart
If you think the colorful maze of wavy lines on this seven-element oscillogram is complex, just try to unscramble the same lines on the one without color (inset). Westinghouse oscillographers, having the same trouble, collaborated with Ansco film experts on a method of photographing the wavy-line readings in color. By placing a filter of a different color in the path of each light beam before it strikes the moving film, as many as seven readings can be produced in separate colors at the same time. Then, to record the colored lines, color film is substituted for the usual black-and-white.