| 摘要 |
The optical position detection device includes a light irradiation unit that irradiates a target object with light, and a light receiving unit that receives reflected light from the target object. The light receiving unit includes a segmented photodiode in which a light receiving surface is two-dimensionally segmented into a plurality of light receiving regions, the segmented photodiode outputting a current corresponding to the intensity of light received by each of the light receiving regions; a light receiving lens that condenses the reflected light from the target object and forms an image of the target object on the light receiving surface of the segmented photodiode; and an arithmetic unit that detects a position of the target object in a two-dimensional direction orthogonal to the optical axis of the light receiving lens, based on the output currents corresponding to the respective light receiving regions of the segmented photodiode. |
