Ultrafast transformation of a space-time signal into an image

Dynamic transformation of an ultrafast space-time signal into an image is p roposed and realized. The transformation is carried out in the sum frequenc y generation of waves of spectral decomposition of two ultrashort pulses, o ne of them containing a space-time signal. A monochromatic wave appearing i n sum frequency generation contains a two-dimensional image equivalent to t he initial space-time signal. The time scale, in which the transformation c onsidered is possible, extends from femtoseconds to nanoseconds.