The light source itself that is actually

Posted by foyitaf on July 28th, 2016

The light source itself that is actually emanating the light. Today, there are two main types of optical systems used on automobiles. The first is known as a reflector lamp. These lamps use optics to direct reflected light. There are two main types of optics used in reflector lamps. 1. Lens optics - refracts light through a lens at the front of the headlight into a desired pattern. 2. Reflector optics - disperses light in a pattern designed into the reflector itself, rather than into the lens. The second type of optical system common to automobiles is known as a projector lamp. This system concentrates reflected light into a focal point aimed through a condenser.

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Beyond optical systems, the light source itself is the other major factor responsible for lighting. The original light source used for automobile headlights was ignited Tungsten gas in a sealed vacuum. These headlights are virtually obsolete due to their lack of efficiency. The addition of halogen (quartz-iodine) technology with Tungsten created more light using less power. The next advancement in lighting uses metal halide lamps that contain xenon gas. This method was dubbed as a high intensity discharge or HID. Introduced in the early 1990's by BMW, HID's had a much higher adoption rate in Europe and Japan than North America. HID's have been praised for many benefits over halogen lamps. These reasons include: 1. Less power consumption with higher luminosity 2. Longevity 3. Increased Safety The newest advance in automotive lighting was the use of LED technology. Advantages of LED's include lower power consumption, longer life spans and more flexible design possibilities. The 2009 Cadillac Escalade Platinum was the first all-LED headlamps sold in the U.S. market.

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