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System and method of determining a position of a radiation scattering/reflecting element

  • US 7,465,914 B2
  • Filed: 09/09/2004
  • Issued: 12/16/2008
  • Est. Priority Date: 09/12/2003
  • Status: Expired due to Fees
First Claim
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1. A system for determining a position of a radiation reflecting/scattering element, the system comprising:

  • a transmissive element or plate having a first surface part adapted to be engaged by the reflecting/scattering element and a second surface part being opposite to the first surface part,a radiating element adapted to provide radiation into the transmissive element and onto the first surface part,a detector adapted to detect radiation provided by the radiating element and that is reflected/scattered by the reflecting/scattering element when engaging the first surface part at a position thereof and outputting a signal relating to an angle of incidence of the radiation, the transmissive element being adapted to guide the reflected/scattered light via total internal reflection to the detector, the detector being at least one at least one-dimensional detector having a plurality of detecting elements each being adapted to detect radiation and to output a corresponding signal,at least one aperture, pinhole, or lens arranged between the transmissive element and the detector and adapted to modulate radiation incident on the detecting elements, anda determining element adapted to determine, on the basis of angle signal, a position of engagement of the reflecting/scattering element on the first surface part.

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