A photoplotter is a printing device that exposes light to a photo sensitive film to produce output.ย� The film is then developed like traditional photos to get the result.ย� There are 2 types of photoplotter, vector type and raster type.ย� Vector plotters move the exposure light anywhere in 2D space to create the image.ย� Need a line from point A to B?ย� No problem, just move from A to B.ย� These are similar to old style pen plotters.ย� Raster plotters, are more like a dot matrix printer, sending out one line of dots, then moving to the next to create an image.