A device and method for vehicular invisible road illumination and imaging is provided. The device includes invisible for
human eye and precisely synchronized for all vehicles
pulsed laser or nonlaser sources of light to illuminate the road. The design and method of the invention involves providing a low probability of being blinded by oncoming vehicles and illumination of the road by light pulses which are shorter than the time which is necessary for the light pulse to travel the illuminated distance observed by the driver. Using a timing
signal acquired from at least one
satellite global positioning system, the period between the illuminating pulses is set the same for all vehicles with a high level of precision. The period between the illuminating pulses is divided into a predetermined number of time zones with a predetermined duration for each zone. Each predetermined
time zone is assigned to a predetermined group of vehicles, for example, for military, government, law
enforcement, ambulance, fire rescue, trucks, luxury vehicles, small, large vehicles etc. In order to further decrease the probability of being blinded by oncoming vehicles and also to reduce the necessary
pulse energy of the illumination
laser, the imaging
system uses gated, spectrally selective imaging detectors with a
luminosity-resolving power product at least 104 cm2 Sr. To increase the reliability for the whole
system, especially for the most demanding types of vehicles such as police, ambulance and fire rescue, an additional improvement is included. For these purposes an additional generator of triggering pulse is included which illuminates an
electromagnetic pulse of a different frequency from that which is used to illuminate the road. This additional triggering pulse is generated prior to the pulse which illuminates the road with a predetermined
time difference, precisely set for all vehicles.