초록 ▼

In an optical digitizer, a cursor is movable on a plane surface having coordinate axis. The cursor includes a source of light that is scanned across the coordinate system, and a detector receiving light from the angle to which the beam is instantaneously directed. The coordinate system has curved mi

In an optical digitizer, a cursor is movable on a plane surface having coordinate axis. The cursor includes a source of light that is scanned across the coordinate system, and a detector receiving light from the angle to which the beam is instantaneously directed. The coordinate system has curved mirrors at the origin and point spaced from the origin along the axis thereof, and plane mirrors extending along the axis. A calculator determines the position of the cursor in the coordinate system by triangulation. Alternatively, the cursor may be a curved mirror, with rotating light sources and detectors positioned at determined points in the coordinate system.

대표청구항 ▼

An optical position determining system comprising a pair of a plurality of elements positioned at defined positions of a coordinate system, and of which elements there is defined a cursor element movable with respect to said positions, one of said elements comprising means for continually rotatably

An optical position determining system comprising a pair of a plurality of elements positioned at defined positions of a coordinate system, and of which elements there is defined a cursor element movable with respect to said positions, one of said elements comprising means for continually rotatably scanning a beam of electromagnetic energy across said system at a determined angular velocity so as to periodically direct said beam toward the other of said elements, said one element further comprising means for receiving and detecting electromagnetic energy reflected toward said one element instantaneously received from the angle toward which the beam is directed, the other of said elements comprising curved reflector means and shaped to receive said beam and reflect it directly back to said one element from any position in said system, said optical system further comprising means for determining a reference position of the beam, means responsive to the time for movement of said beam between said reference position and a position at which reflected energy is received at said one element for determining the relative angular position of said other of said elements with respect to said reference position, and means coupled to said one element for calculating the relative position of said cursor in said coordinate system by triangulation.