A HBT comprises of a fully adjustable optical collimating lens assembly which is rail mounted and designed to prevent any distortion of the optical lens supporting structure in general use, such as when aligning the lens to the vehicle or manoeuvring the equipment along the rails.
The optical lens itself, which is designed to accurately focus all types of vehicle headlamp, is fully adjustable in the vertical plane; achieved by mounting it to a vertical column.
The measurement travel of the lens is between the heights of 500mm and 1500mm, which allows for the testing of all vehicles up to and including heavy goods vehicles. Finally, at the top of the lens mounting column is a mirror or laser which allows the headlight tester to be aligned with the longitudinal axis of the presented vehicle.
During a headlamp inspection, the vehicle headlamp is aimed at an aiming screen target which has four solid red or blue lines showing the 0.5%, 1.25%, 2% and 2.75% positions about the centreline. The % increments are only in the 3.25% and 4% positions when the tester is to be used with HGV’s.
The measurement is taken by shining the headlamp through the lens in order to display the beam pattern on the aiming screen which then can be checked as acceptable by a trained technician.
Our double laser headlight tester can be viewed and purchased HERE.