Patent ID: 6466382
Filing Date: 2002-10-15
Classification: G03F

Abstract:
An optical arrangement, comprising a projection exposure system for microlithography, in particular having slit-shaped illumination, having at least one light source that emits radiation and an optical element that is heated by exposure to the radiation, wherein the optical element is exposed to the emitted radiation of the light source with non-rotational-symmetric intensity distribution; whereina) the optical element (1; 101) has an absorbing coating (4, 5; 104, 105) having a spatial distribution such that b) the absorption of the coating (4, 5; 104, 105) is non-rotational-symmetric in an approximately complementary manner to the intensity distribution of the exposure to the radiation (7, 107, 108, 109) of the light source (10; 110, 111, 112).