Projection arrangement for projecting an image onto a projection surface

A projection arrangement for projecting an image onto a projection surface, which arrangement comprises several projection units, each comprising a light source (26);

• a film stage (2), arranged following said light source (26), for holding a positive image recorded on a carrier medium;
• projection optics (3), arranged following the film stage (2) when projecting the positive image;
• and a first coupling member;
• said projection arrangement further comprising a control unit (25);
• a supplementary module comprising a light modulator (10) which is controllable by the control unit (25) in order to generate an image on the basis of predetermined image data;
• an optical device (11), arranged following the light modulator (10), for projecting said image onto the projection surface (34);
• and a second coupling member cooperating with said first coupling member, wherein the supplementary module may be coupled to the projection units via said coupling members, and wherein
• said supplementary module further comprises a control device (6), allowing either to direct light from the light source (26) of the projection unit, to which the supplementary module is coupled, to the light modulator (10) or to illuminate a positive image, which is held by the film stage (2), with said light.