Method and apparatus for recording and/or indicating in quantified form a function of two variables

摘要

Method and apparatus for recording and/or indicating a function of two variables, characterized in that a signal having a value Z which is a function of two variables X and Y is quantified and is then represented in quantified form. The representation in quantified form is effected by projecting a luminous spot on a display area at the point of coordinates (X, Y) wherein the luminosity of the spot represents the quantified form of the value Z.