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The Oxford Optical Pointer: a direction-sensing device with proportional electrical output

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Publication details

JournalMedical and Biological Engineering and Computing
DatePublished - Jan 1988
Issue number68
Number of pages7
Pages (from-to)68-74
Original languageEnglish


For some disabled people pointing provides a more convenient means of communication and control than the use of switches. The quadriplegic who retains good control of head movement can be provided with a number of input alternatives, but no existing system meets all the requirements of a general-purpose electronic pointing device. Consequently the Oxford Optical Pointer has been developed. The principle by which it converts relative direction into analogue electrical signals is described and its application as a head-mounted device for controlling an electric wheelchair is presented.

    Research areas

  • direction sensor, head control, infra-red, joystick emulator, photo quadrant detector, proportional input device

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