Road surveillance cameras on the led lighting lighting Angle requirement

At night road surveillance cameras to make sure that the license plate, on the one hand require the camera light inhibition index is better, can effectively inhibit right against the face of strong light, make the license plate is clearly captured, pictures and true; On the other hand to object to the light.

a backlight compensation technology is good or bad, is directly related to whether can clearly see the license plate, can make the back-end video detection and analysis system for correct judgment result is given. Photo clearly depends on the choice of surveillance cameras with backlight compensation, at the same time also need to add an led lighting lamps and lanterns. Outdoor vehicles in addition to the light itself of lamps and lanterns ( The light is harmful to the camera) Light, another is the environment itself, the ambient light in the vehicle diffuse light to the camera is very few, it's need to increase the brightness of the led lighting lamps and lanterns to increase exposure object to meet the requirements of the camera to light. Mainstream intelligent transportation integrators illumination requirements for led lighting lamps and lanterns of the current classification is more, no unified standards, require clearly in 20 meters can according to the object.

can be roughly divided into two groups, there is 17 meters to 20 meters distance, need illumination for 100 lux. The other kind is 20 to 23 metres distance, intensity of illumination requirement of 200 lux.

single case, namely the lamp height 6 meters, 20 meters distance, wide lane 3. 5 meters, the actual demand type light Angle of 9. 58 degrees.

two-lane conditions, namely the height 6 meters, 20 meters distance, two-lane 7 meters wide, the actual demand type light Angle of 19 degrees.

these two schemes can adopt reflective bowl with lens combination design, use of reflective bowl concentrated the advantages of small Angle and the distribution of the optical lens to achieve maximum photosynthetic efficiency use, and at the same time within the scope of the requirements to achieve the desired effect of the uniform illumination. The bang

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