Ljusstyrkefördelningen

Ljusstyrkefördelningen, often translated as luminous intensity distribution, describes how the intensity of light emitted or reflected from a source is distributed in different directions. This is a fundamental concept in photometry and lighting design. It is typically represented graphically as a curve or a set of curves, showing the luminous intensity in candelas (cd) as a function of the angle relative to a reference direction, usually the nadir (downward direction).

Understanding the luminous intensity distribution is crucial for determining the suitability of a light source for a specific application. For instance, a spotlight has a narrow and concentrated distribution, directing light intensely into a small area, while a floodlight has a wider, more diffused distribution. The shape of the distribution curve influences how light is spread across a surface, affecting illumination levels, uniformity, and the potential for glare.

Ljusstyrkefördelningen is determined by the design of the light source itself, including the bulb type, reflector, lens, and diffuser. Manufacturers provide this information in datasheets or photometric files to enable engineers and designers to accurately predict and control lighting outcomes. Analyzing these distributions helps in selecting the correct luminaires for tasks such as street lighting, architectural illumination, and interior workspace lighting, ensuring optimal visual comfort and efficiency.