| 摘要 |
An apparatus for optical encoding. An electrical input circuitry is provided for providing a pulsed electrical input signal. A light source circuitry is connected to the pulsed electrical input circuitry for utilizing the pulsed electrical input signal to produce pulses of light. Light collecting and electrical conducting circuitry is provided and synchronized with the light source circuitry. The light collecting and electrical conducting means is positioned in relation to the light source circuitry for receiving and being responsive to light produced by the pulsed light source circuitry. An electrical output signal is produced, indicating such a response. Positionable light interrupting circuitry is provided for opening and closing the optical path of light being transmitted from the light source circuitry to the light collecting and electrical conducting circuitry. The opening and closing affects the electrical output signal, the resulting pulsed electrical output signal for use in encoding. The apparatus results in minimized power consumption as a result of the pulsed synchronization of the light source circuitry and the light collecting and electrical conducting circuitry. The present invention is particularly adaptable for use with cursor control devices for computer controlled display systems.
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