| Abstract: | A device for measuring convergence of a color CRT including image pickup
means for producing three color image signals with respect to three color
test patterns constituting a composite test pattern presented on a viewing
screen of a color CRT, change means for changing the image magnification
of said image pickup means according to the pitch between color phosphor
elements on the viewing screen, and calculation means for calculating
respective luminous centers of gravity of the three color test patterns
from the three color image signals, and calculating a misconvergence of
the color CRT from the calculated luminous centers of gravity and a
changed image magnification. |