| 摘要 |
PROBLEM TO BE SOLVED: To provide a positional deviation detecting machine of disks which may be reduced in its cost. SOLUTION: This positional deviation detecting mechanism has three detecting holes 111, 112 and 113 which are respectively disposed at the base surface of a loading section 110 for the five disks of a rotary tray, a light emitting section 200 which casts light on a specific area (an area facing the detecting hole 111) among the light reflectable regions of the disks (not shown in Figure) loaded on the loading section 110 moved to a detecting position, four reflector plates 300 which successively introduce the light reflected from the specific area (the area facing the detecting hole 111) to the two different specific areas (the area facing the detecting hole 112 and the area facing the detecting hole 113) among the light reflectable regions 910 and a photodetecting section 400 which receives the light reflected by the last specific area (the area facing the detecting hole 113) of the two different specific areas. The positional deviation of the disks is detected by utilizing the change in the quantity of the light received by the photodetecting section 400 when the disks are deviated from right positions and when the disks are properly positioned.
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