An image forming device includes an image carrier, a charging unit, an exposing device, a developing device, a control device and a pair of position adjusting devices. Each of the position adjusting devices is respectively provided at a leading edge and a trailing edge of an output field of the laser light of the exposing device. The position adjusting devices move the exposing device in a direction intersecting with a plane including a rotational center line of the image carrier to adjust a scanning direction of the laser light to be parallel to the rotational center line of the image carrier.

 
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< Optical scanner for scanning a laser beam in accordance with an image signal

> Compact laser altimeter system

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