| 摘要 |
A plurality of CCD sensors are arranged whose respective light receiving portions form a line sensor of a single straight line on a plurality of ceramic substrates. The plurality of ceramic substrates are arranged on the frame such that one end portions of respective elastic elements are in contact with the longitudinally opposed side edges of the ceramic substrates, and the other end portions are fixedly mounted on the frame. When the frame expands or contracts due to a change in circumferential temperature so that displacement in the longitudinal direction occurs, the one end portions of the elastic elements slide on the edge parts of the ceramic substrates. That is, deformation in the longitudinal direction of the frame is not transmitted directly to the ceramic substrates. Thus, it is possible to prevent space or interval slippage on a straight line from occurring between the plurality of CCD sensors.
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