optical design

  1. Splendor

    Knowledge What is a TIR optic?

    A TIR (total internal reflection) optic is a compound lens that combines the best of both a reflector and a lens to maximize the beam shaping capabilities. The compound lens consists of a refractive lens inside a reflector. The refractive lens collects and manages the light from an LED package...
  2. Splendor

    Knowledge What are hard beams and soft beams?

    A hard beam has a very well defined beam of illumination, with a sharp drop-off at the edge. A soft beam fades gradually out toward the edges and therefore there is a softer cutoff of light output. The field-to-beam ratio helps identify the difference between hard and soft beams. A hard beam has...
  3. Splendor

    Knowledge What is center beam candle power (CBCP)?

    Center beam candle power (CBCP) refers to luminous intensity at the center of the beam of a lamp or luminaire. Every light distribution has a point of maximum intensity. For most symmetrical beams, the point of maximum intensity tends to be located at the center of the light beam. It typically...
  4. Splendor

    Knowledge What are beam spread, beam angle, and field angle?

    Beam spread, as defined by the Illuminating Engineering Society (IES), describes the angle between the two directions in a plane in which the intensity is equal to a stated percentage of the maximum beam intensity as measured in a plane through the normal beam centerline. Beam spread is a...
  5. Splendor

    Knowledge What is optical delivery efficiency?

    Optical delivery efficiency describes how efficiently light emitted from the light source is delivered for all of the various jobs of the lighting. Optical design plays an important role in deciding the success of a light fixture. To reduce power consumption, the optical efficiency of the whole...
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