Methods and apparatus for position determination
OwnerAmos Talmiinventor
Life of this patent
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Abstract
Apparatus for the measurement of position of an object in a given direction, comprising: a one-dimensional array of light detectors, comprising a plurality of detectors including at least three detectors, each of which produces a signal at a given position in response to light reaching the detector; at least one edge between a dark and a light area viewed by at least one of the plurality of the detectors, which the at least one edge moves, in relation to the plurality of detectors, as the object moves in the given directions; and computing circuitry which receives signals from the at least one detector viewing the at least one edge and determines the position responsive to the signals produced by the at least one detector at the given position.
Claims49
Apparatus for the measurement of position of an object in a given direction, comprising:
- at least two light detectors including a plurality of light detectors each of which produces a signal at a given position in response to light reaching the detector;
- a plurality of edge portions defined on at least one edge between at least one dark area and at least one light area, each of said edge portions being viewed by at least one of the plurality of detectors, which at least one edge moves, in relation to the detector, as the object moves in the given direction;
- and
- computing circuitry which computes a plurality of estimates of position based on different ones of the signals produced by the detectors and which determines the given position based on a plurality of said estimates.
Scanning apparatus comprising:
- a scanning bed having:
- at least two edges, each of said edges having a band of alternating dark and light strips running therealong;
- and
- an area suitable for accepting a document to be scanned between said bands;
- and
- a scanning unit having a linear array of optical detectors, each said detector producing a signal in response to light received by the detector, the unit being operative to be moved along the scanning bed, such that a first plurality of detectors view the document and a second and a third plurality of detectors view the two bands respectively.
Dependencies are inferred from the claim text.