Apparatus for providing uniform exposure at an exposing station

摘要: Apparatus for producing uniform exposure at an exposing station comprises a source (1; 63, 64) of radiant energy; means (8 to 10; 27 30; 31 37; 41; 67, 70, 71) redistributing said energy 'n manner within rotationally symmetric divergent cone (42) and/or over predetermined cross-sectional area (53) delivery station; and (2, 4 6, 15 18; 20, 21, 24, 25; 43 52; 59, 60; 69, 77 81) controlling the level delivered in use expos- ng (12 14; 56 58; 72, 75, 76). The is preferably pulse operated least one laser. optically transmitting fibre light guide.