Advantages of Projector Headlights
In the world of technology, the projector is not a new invention. Modern projector units have existed since the early 1920′s. They have existed as long as slides (still photos) and movies have been shown. The technology actually belongs to the AV (Audio/Visual) world, but arrived in the automotive industry in the early 1990′s.
What is a curved lens?
The term “curved lens” is used for simplicity. The optical name for it is “Plano convex”. One side is plano, the other is convex. Another commonly used name is ellipsoidal lens. It is also called a collector lens, because it collects light rays to a concentrated beam. They may seem very propitiatory, but if look around, you will find single, generic curved lenses in various sizes available. For example, sells 3″ Ellipsoidal lenses.
The automotive projector unit
The reflector gathers as much light as possible so that it passes above the cutoff shield and gets evenly spread out by the curved lens:
Whats a HID Cutoff Line?
The projector headlights have projector lens that create a cut off line of light. This HID cutoff line allows projector lens to put as much light on the road without jeopardizing the safety of on coming traffic. All the light output is below the cut off which is below oncoming traffics eyes, making for a safe trip. Have you even try to drive by a HID equipped projector car and notice how you get a blue “flicker” but the light output is white? This effect actually is the color along the cutoff. The projector lens bend the light creating a blue line above the cutoff making it appear blue; however the bulbs are NOT blue like 8000 HID Kit.
The reason that the projector lens create cutoff pattern is because we want to avoid putting too much light to the upcoming traffic; therefore, there are different cutoff pattern for left hand drive and right hand drive countries. We will show the appropriate cutoff pattern for left hand drive and right hand drive below, if you are US or Canadian drivers, you should use the DOT cutoff pattern (the ECE LHD pattern is for European Left Hand Drive countries); if you are located in European countries that are left hand drive, please refer to the ECE LHD cutoff line pattern, if you are located in European countries that are right hand drive, please refer to the ECE RHD cutoff line pattern.