| 摘要 |
PURPOSE:To realize the positioning of a solid-state scanning optical head to a medium to be exposed to light with high accuracy, by mounting receiving members having a surface at right angles to an axis of the medium to be exposed on both ends of the solid-state scanning optical head, providing V-shaped notches on the receiving members, and nesting an axis part of both ends of said medium into the notches. CONSTITUTION:An optical head 3 is pressed toward a medium to be exposed to light 1 by compression springs 6a, 6b, whereby V-shaped notches on the tops of receiving members 14a, 14b move along collars 13a, 13b rotatably fixed on an axis 15 of the medium 1 to come into a stable state that the collars 13a, 13b reach the bottoms of the notches. Namely, if the compression springs 6a, 6b press the optical head 3 toward the medium 1 to the full, the optical head 3 integrally formed with the receiving members 14a, 14b having no longitudinal restriction moves until the collars 13a, 13b abut on both inclined surfaces of the V-shaped notches of the receiving members 14a, 14b. If this relation is maintained, a positional relation between the optical head 3 and the medium 1 can be kept constant. |
