a photographic printer that uses a plurality of small crts , or multiple image segments displayed on a single crt , to print wide format images . within the printer , the multiple crts are positioned adjacent one another and display through lenses so that image segments displayed by adjacent crts join one another . the image segments of the single crt also display through lenses , or mirrors and lenses , that join the segments . the printer may decompose each line of the image into horizontal image segments , or the printer may receive each image segment from a host computer system , and the printer displays the image segments on the crts such that they are exposed joined with one another on the photographic media . the printer also contains a closed loop calibration system to adjust the length of each image segment .