The Importance of the Optic in the Lighting LED

The optical is one of the factors key in the operation and duration of the luminaires LED.

The Importance of the Optic in the Lighting LED

The optics of a LED luminaire is based on the design of mirrors, lenses and elements that help control the projected light. The optic is essential for the efficiency of the luminaire. The headlights of cars are one of the clearest examples of optics, the physical properties of glass lenses allow the beam of light amplified and intensified its scope. The optics help to direct the light, increasing its intensity or protect us from glare.

In the case of LED lighting, there are two basic optical types.

  1. Primary. It protects each chip
  2. High school. Charge of molding the light according to the type of lenses that have installed the fixture. Lenses can be of two types: divergent that extend the light or convergent beam that concentrate the light beam. Also could consider is as a third type of optic the fiber optic by help to disperse and direct the light.

How choose the optical most appropriate for each project

In projects of lighting of Interior it normal is find is optical of diagrams symmetrical, while in the case concrete of the lighting public, is often use optical asymmetric that direct the light to areas specific to avoid losses light.

The majority of them elements optical for lighting are manufactured in polycarbonate of grade optical or acrylic to maximize the transmission light. There are also other lenses manufactured in polystyrene which have one lower optical performance and a further deterioration over time but are less expensive to produce.

In addition to the materials of manufacture there are other parameters to have in has:

  1. FWHM (Full Widht at Half Maximum) It is a value that shows the maximum optical performance of the appliance. Section of the distribution of the light:
  2. Value of the 10%. It indicates the angle that the light intensity decreases by 10% with respect to the maximum value. Vital parameter for optical components of narrow beam. How much closer is the value of 10%of the FWHM less waste and more focused light.
  3. CD / LM (candelas per lumen) is the factor that measures greatly the efficiency of the luminaire. The value cd / lm must be seen in combination with all the factors of the optical and analyze is with much care. We can find examples of luminaires that have a high peak to the Center, but the shape of the curve is of low quality or low efficiency for the entire system.

Optical components in LED lighting play a vital role for the final success of the fixture, there are enough parameters to be considered for each application or project, that they are to be compared between different optical solutions with great care.

 

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