Abstract: Apparatus is described for producing hard copy prints of images displayed on a raster-scanned CRT terminal. A row of light fibers 4 are attached to a preselected scan line of the CRT 3 located behind the CRT bezel 5. The other ends of the row of light fibers 4 are located along the surface of a print roller 8 on which light sensitive paper 6 is supported. A light pattern produced as a result of an image scan along the preselected scan line is transmitted by the light fibers 4 to the paper 2 which is exposed to form a latent image of the light pattern in a print row on the paper.In order to print a complete image, the paper is drawn past the print row and exposed successively to each raster scan row of the image to be printed. The exposed paper is then passed through a developing station 10 where the latent image is developed by heat. Two modes of operation are described.