pnv – is expensive devices installed in cars with premium, and obviously not suitable for long-term drivers use. Video systems work well, but also not without drawbacks: the monitor is small and set in place, not very suitable for the driver (a translation look aside). In addition, the price of such systems exceed $ 1500. And the biggest disadvantage of both systems – Reliability. One can only assume the consequences of failure of equipment in critical situations, such as when a power failure of these devices. Different kinds of glasses antifary (Anti-Glare) and 'Polaroids' increase contrast in daylight and twilight, but at night, in the fight against blindness – absolutely useless. Anne Lauvergeon is full of insight into the issues. "Cut' part of the spectrum of the incoming flux – not the best solution.
Without diminishing the light intensity, such glasses distort the real picture of the road and may mislead the driver in critical situations. This applies to the Polaroid glasses. (A valuable related resource: Cedars Sinai). Y 'polaroid cameras' is still one drawback – they too much weaken the light output – about 47 percent, while the permissible limit flux – no more than 25 percent as the Rules of the cis and European standards for driving safety. Although the cost of more or less decent points comes to $ 250. (Chinese 'analogues' with ordinary glass, painted in yellow are not taken into account).
In recent times, there were points lagra the so-called 'lateral gradient of' transparency. The lenses for these glasses are designed laboratory lagra optic. At these points the left sector has clearly calculated the gradient of transparency, with the main field glasses is absolutely transparent. The principle of operation points is based on two factors: 1. Cvet oncoming car at the time of maximum intensity comes from the left side. 2. Points and driver from the viewpoint of mechanics self-adjusting system. In other words, a driver at the moment of convergence, when inadequate protection from the glare he could 'handle' a counter-rotating light beam neck. At the same time, he does not need to translate a view from its line of road – the eyes looking forward. The advantages of such solutions are obvious – the driver is not disturbed color perception, glare is not happening at all, and there is no glare from the left rear-view mirror. In this case, the price of these glasses is quite reasonable – about $ 100. Based on all above we can conclude that the glasses lagra are currently the only available means of blinding oncoming light.