Advantages and disadvantages of bifocal lens, the difference between bifocal lens and single vision lens

There are two types of automotive headlight lenses, one is a single-lens lens, and the other is a double-lens lens. The difference between a bifocal lens and a single vision lens is in the range of functions. A single vision lens generally can only take care of the low beam or high beam function alone, while a double vision lens can have both near and high beam functions with one lens. In addition, there is a solenoid valve in the bifocal lens, while the single vision lens does not.

Advantages and disadvantages of bifocal lenses

The advantage of double-lens lens is that it has strong light-gathering ability, one-piece design, one lens can control the switching of near and far light, and it is generally a low-beam light and lens. After installing a double lens, it can achieve two close to four distances.; The disadvantage is that the price is more expensive, if the quality of the product is poor, its light type will be poor, the light projection distribution is uneven, and light leakage may occur.

Compared with the two, the light cutting line produced by the single-lens lens is not as good as that of the double-lens, and the range and width of the light of the single-lens are not as good as that of the double-lens. The working principle of the bifocal lens is to obtain the headlight switching signal, turn on the solenoid valve, and adjust the angle of the lens, so as to realize the switching of the far and near light state.