| 摘要 |
PURPOSE:To eliminate the need for high accuracy in optical parts but ensure to have a sufficient positioning in image areas by performing a movement adjustment for a cylindrical reflector to be set between a polygon mirror and sensitive substances in both directions such as an optical axis as one direction and a direction to be orthogonal to scanning and optical axis directions as other direction. CONSTITUTION:This device consists of a frame 10 where a cylindrical reflector 3 and its support members as well as other adjustment members are stored; a cylindrical reflector support spring 11 which supports the cylindrical reflector 3 at the frame 10 so that the reflector 3 is movable towards the optical axis direction as well as the direction to be orthogonal to the optical axis and the scanning directions; an optical axis direction adjustment screw 12 where the cylindrical reflector 3 is fixed on the frame 10 by screws and makes the cylindrical reflector 3 move back and forth, on right and left according to extents of delivery; cylindrical reflector hoisting spring 13 which is held by the frame 10 and the cylindrical reflector 3 from the directions to be orthogonal to the adjusting screw 12 and will press towards the cylindrical reflector 3 and the non-scanning direction; non-scanning direction adjustment screw 14 which will press the cylindrical reflector 3 against the spring 13. Thus this device can carry out simple and high accurate adjustment works for a reference image area by using laser beams.
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