Lighting influence in the perception of the contrast of objects in movement by using frequency doubling technology (FDT)

Abstract

Driving is a complex task, which needs, among others, a good contrast perception of objects in movement in varying light conditions. Drivers received most of the information by means of his eyes. The area of the space perceived by the eye when a point of fixation is observed is defined as the visual field and can be affected by such factors as the design of the vehicle, the ambient conditions, the traffic, the speed of traffic and the physical and psycophysical conditions of the driver. So it must be considered the importance that a suitable visual field has for a safe driving. Light sensitivity or its inverse - the luminous differential threshold to the detection of a stimulus- changes along the field of vision. Visual fields are explored inorder to locate injuries along the optical parthway, to document its gravity and to measure its progression thoughout the time. Visual field extent depends, in a great manner, on the number and on the functioning of the receptive fields of the gangionar cells. A technology used habitually to measure it is the automated perimetry.