A drive arrangement has first and second wheels and an endless loop member. Firstly, a peeling-off film, a silicon oxide film and an amorphous silicon film are formed in succession on a glass substrate, and the amorphous silicon film is irradiated from above to obtain a polycrystalline silicon film. Each image data on a search region for each knot to be processed are copied from a contour image stored in an image storage to the respective local memories. The radial perspective includes a centered node, around which other displayed nodes and relationships are substantially concentrically arranged. An incident light adjusting unit that is moved to the aperture position is positioned by contacting with at least one of other incident light adjusting units that are retracted from the aperture.