A luminaire for projecting an image comprises a housing (1) having a light emission window (2). The housing (1) accommodates a light source (3), an optical system (4) for directing light originating from the light source (3) along a longitudinal axis (5), and an image-forming surface (6) which is positioned...http://www.google.com/patents/US6478453?utm_source=gb-gplus-sharePatent US6478453 - Luminaire
