Patent ID: 7362451
Filing Date: 2008-04-22
Classification: G01B

Abstract:
1. A sensor device, comprising: a light-transmitting element for irradiating an object to be measured with light at a prescribed angle; an image pickup element for receiving the light to be measured at another angle; a normal measurement area setting device capable of setting a normal measurement area in a visual field of the image pickup element; an irradiated-light image position detecting device for detecting a position of a light-irradiated image in the visual field of the image pickup element by scanning the normal measurement area; a following-type measurement area setting device for setting at least one following-type measurement area which includes a position of the detected irradiated-light image, and is narrower than the normal measurement area in a displacement measuring direction; a displacement measuring device for measuring a target displacement by scanning the following-type measurement area; and an output device for outputting the target displacement.