object being focused upon by projector 34 is composed of alternate light and dark bands extending parallel to straight stripes 76 e g a picket fence although the drawing figures illustrate stripes 76 as being relatively wide and few in number in actuality there may be several thousand stripes in the array on platen 32 each stripe being in the order of only a few e g 2 5 microns wide the filter stripes 76 on platen 32 while they may be a diffraction filter actually consist of very fine abutting parallel red r green g and blue b films which divide the incoming light image into its color components thus when a tape frame 12a is exposed at plane p the image applied to the image area i of the frame consists of red green and blue color components of the picture projected onto the frame which components are interlaced on the frame in other words the picture information for each color component of the picture is stored every third line of the tape frame at plane p as will be seen the color filter stripes coincide with the raster path of an electron beam that scans the frame in order to read out the image thereon when the frame is located at read station 28 the system may also include provision for automatically focussing projector 34 prior to writing an image on the tape and for controlling the charging of the tape by electron source 52 during the exposure process since those provisions are described in my first mentioned application they will not be detailed here since they are not really part of the present invention refer now to fig4 which shows the electrical environment of tape frame 12a.