Patent ID: 8167698

Claim:
A system comprising: a surface for placement of an object, wherein the surface has a periphery; for providing light; and light detectors, wherein the light emitters and the light detectors are arranged around the periphery of the surface, wherein the object comprises at least a first part with optical properties of a first type and a second part with optical properties of a second type different from the first type for the light provided by the light emitters; and a processor configured to determine a first orientation and a position of the object on the surface from reflected light reflected by the second part of the object in a first direction and detected by a first set of the light detectors in response to being illuminated by a first light emitter of the light emitters when the object is in the first orientation and the position, the processor being further configured to determine a second orientation of the object located at the position from reflected light reflected by the second part of the object in a second direction and detected by a second set of the light detectors in response to being illuminated by the first light emitter when the object is in the second orientation and the position.