Patent ID: 6872933
Filing Date: 2005-03-29
Classification: G01C,G01D,G01F,G01P

Abstract:
1. An optical transducer, comprising: a light source far emitting radiant energy; a base member having a surface; an elongate light collector positioned for receiving radiant energy from the light source, the elongate light collector comprising a tunnel formed in the base member, a length of the tunnel intersecting the surface to form an elongate opening, such that radiant energy projected by the light source through the elongate opening is incident on the tunnel and transmitted along a length of the tunnel; and at least one photosensor positioned for detecting an amount of the transmitted radiant energy; wherein the amount of radiant energy detected by the at least one photosensor is indicative of at least relative position between the incident radiant energy and the at least one photosensor.