| 摘要 |
A small, lightweight housing includes a plurality of light signal transmitters and can be attached to the body such as the wrist of an operator such that another part of the body or another object can be brought into the beam of a particular light transmitter to reflect or scatter the light signal from one of the light signal transmitters and coded such that a particular light transmitter can be distinguished. A receptor associated with the housing receives the reflected or scattered or scattered light and alters the signal applied to a light signal transmitter, such as by increase of power, increase of the number of similarly modulated light transmitters which are driven or coding such as imposition of additional modulation. A signal is then received from an optical link by an optical receptor at a base station.
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