EXPOSURE SYSTEM

PURPOSE:To improve resolution and productivity, by providing a light transmitting body, which is displaced in the direction intersecting a light path, and has a rough surface between a light source and an original plate. CONSTITUTION:A light transmitting body 6, which has a rough surface 6a, is linearly displaced and reciprocated in the direction intersecting a light path of light 4 by a driving mechanism. The light transmitting body 6 is provided between a light source 3 and an original plate 5. Therefore, spatial interference of the light 4 of such as laser having relatively short wavelength e.g., is decreased. Occurrence of interference fringe due to excessively good spatial interference and the resultant unclear profile of a figure, which is transferred on a material 1 to be exposed from the original plate 5, is avoided. The figure on the original plate 5 is transferred to the material 1 to be exposed by the light 4. Thus the exposing time is shortened, and the resolution of the figure, which is transferred from the original plate to the material to be exposed, can be improved without impairing productivity.