| 摘要 |
PURPOSE:To obtain assembling characteristics having high accuracy, by fitting an optical frame formed as one body by a casting, to the lower chassis, and fitting a unit containing original plate glass, an exposure lamp, a mirror block, electrifying device, etc., to this frame. CONSTITUTION:Shafts 18, 19 for guiding a uniform-speed lamp frame 20 and a half-speed mirror block 21 are slidably fixed to one end face part of the upper part of an optical frame 1, and also to the other end face part, a rail 22 for supporting one end of the half-speed mirror block 21 and the uniform-speed lamp frame 20, and also moving them smoothly is fixed. Also, a lens 23 is fitted to a lens housing part 33 provided on the center part of the optical frame 1 through a lens frame 24, and the residual morror group for forming an optical axis is fixed to a mirror block 25, and thereafter, is positioned and fixed to the optical frame 1. Also, the original plate glass 30 lays a glass supporting plate on projecting parts 26, 27, 28 and 29 of the optical frame 1, and is fixed on said plate. |
