Abstract
This paper describes a method which enables a noncontact positioning device using an optical sensor of mouse to be used in a strong ambient light condition such as outdoor solar light. The optical sensor does not function in solar light because of both luminance saturation and disappearance of laser speckle pattern. In the proposed method, a pipe and a bandpass filter are attached to the end of the aperture near an image sensor of the optical sensor so as to reduce the solar light. The experimental results show that the device functions in solar light and estimates the position of a vehicle which is equipped with the positioning device.
