초록 ▼

A system for providing signals which are indicative of a target\s position along at least one dimension across an electromagnetic energy beam. The system comprises a transmitter for transmitting energy which is encoded such that the polarization state of the energy varies across the beam, and a rece

A system for providing signals which are indicative of a target\s position along at least one dimension across an electromagnetic energy beam. The system comprises a transmitter for transmitting energy which is encoded such that the polarization state of the energy varies across the beam, and a receiver which responds to the polarization of the received energy to provide signals indicative of the relative position of the target within the beam.

대표청구항 ▼

A system for providing position signals comprising: first means for transmitting a beam of electromagnetic energy which has encoded thereon, as a polarization state of the energy, angular position along at least one dimension across said beam with the transition of the polarization state being from

A system for providing position signals comprising: first means for transmitting a beam of electromagnetic energy which has encoded thereon, as a polarization state of the energy, angular position along at least one dimension across said beam with the transition of the polarization state being from elliptical polarization of a first sense at one edge of the beam, through linear polarization, to elliptical polarization of the opposite sense at the opposite edge of the beam; and second means for receiving a portion of said transmitted energy, decoding its polarization state and providing therefrom position signals indicative of the angular position of the received energy within said beam and along said dimension.