Patent ID: 8390807

Claim:
An optical data insertion device suitable for optically inserting additional data into a light receiver of the type having means operable to capture an incident light and focus it or output a signal indicative thereof, the optical data insertion device comprising: a light guiding device comprising: an elongate light transmitting solid body, the body tapering from a wider end to a narrower end, the wider end adapted to provide a receiving surface for receiving incident light travelling in the first direction and the narrower end adapted to provide an exit surface for said incident light; and a reflector provided adjacent to the narrower end, the reflector adapted to receive said incident light from the exit surface and reflect said incident light away from the device in the second direction, the light guiding device adapted such that its exit surface is positioned adjacent to or in alignment with an aperture of the light receiver; and a light source, operable to emit light corresponding to the additional optical data for insertion, the light source positioned adjacent to or in alignment with the capture surface of the light guiding device; and the light source selected from the group consisting essentially of a lens, prism, mirror arrangement, light emitter, a projector, and combinations thereof; wherein the intensity of light emitted by the projector is variable; wherein the variation is automatically controlled by a suitable control unit in response to a timer input the light intensity is varied by being pulsed; wherein further the pulses rise rapidly to a maximum intensity, fall gradually to zero or a low level and hold at zero or at a low level for a suitable time period.