1. An imaging device, comprising: an image sensing device comprising a plurality of image sensors, the image sensors being continuously arranged and configured for sensing images; a lens array comprising a plurality of lenses corresponding to the image sensors; a light-channel plate defining a plurality of light channels corresponding to the lenses, each light channel receiving a corresponding lens; a storing device configured for storing a predetermined object distance; a distance sensor configured for sensing a current object distance, and controlling the imaging sensors to sense images if determining the current object distance is larger than the predetermined object distance; and an image processor electrically connected with the image sensors and configured for combining the images sensed by the image sensors.