Illumination system in a projection copier

An illumination system in a projection copier for the illumination and the projection of an original onto a light sensitive recording material comprising;

• (a) platform means for receiving the original;
• (b) a plurality of reflectors, each of said reflectors comprising two reflector parts detachable from each other at a separating point;
• and,
• (c) radiating source means partially surrounded by said reflectors for reflecting incident radiation in the direction of the original wherein each radiating source at two transverse sides of the illumination system is surrounded by three heat-protection filters and each radiating source at two longitudinal sides of the illumination system is surrounded by two heat-protection filters and one reflector plate arranged between the radiating source and the longer of two reflector parts of a reflector in the radiator unit, wherein said one reflector plate corresponding to said radiating source at each end along the longitudinal axis of said illumination system is a rectangle beveled along the upper edge and said one reflector plate corresponding to the middle radiating source along the longitudinal axis of said illumination system is a rectangle.