104 one or more lamp and reflector assemblies forming a light source 107 are provided for illuminating the line like area on which scanning array 100 is focused fig4 shows the essential portions of an imaging scanning array 100 in which a substrate 110 has a plurality of silicon chips 112 a 112 b 112 z assembled end to end and mounted thereon also defined on each chip 112 a 112 b 112 z is a set of photosensors 114 these structures may be by way of example and not limitation photosensors in a ccd photogates or cmos photodiodes the most common primary material for chips 112 a 112 z is crystalline silicon a substance for forming substrate 110 is the board sold under the tradename ceracom made by ibiden corporation of japan which generally comprises a ceramic core with a fiberglass resin laminate thereon another material suitable for substrate 110 includes the printed wire board material known as u201c fr 4 u201d or a relatively thin substrate of alumina on each chip 112 there is provided a large number such as 250 or more photosensors 114 which are separated by a largely consistent pitch a pitch being defined as the distance between the centers of adjacent photosensors within a chip in a full width array ideally the short pitches at the end photosensors will add up to the same pitch relative to end photosensors of adjacent chips.