Luminous Intensity Distribution - Knowledge Base DIALux 4

Trang chủ » C0 C180 C90 C270 » Luminous Intensity Distribution - Knowledge Base DIALux 4

Có thể bạn quan tâm

How can we help you today?

Enter your search term here... Search Solution home Dictionary L

Luminous intensity distribution Print

Modified on: Mon, 27 Jun, 2016 at 4:17 PM

The luminous intensity distribution pattern for a light source shows in which direction and with what intensity the light is emitted. The individual values can be presented in tabular or graphic form, and a number of diagrams are normally employed for this purpose. Luminous intensity is usually based on a 1000 lm light source.

C Plane System

The interior around the light source is treated as comprising a large number of planes, which can be divided up into the A, B and C plane systems. The most frequent procedure is to use the C plane system, with the common axis represented by a vertical line passing through the centre of the luminaire. Every plane is then defined in terms of the angle formed with a defined line of reference, e.g. the axis of the luminaire. Luminous intensity is usually measured in the C-plane at 15° intervals and for emission angles in 5° increments.

Polar Curve

A polar curve  (luminous intensity distribution curve) normally shows the values measured in the C0/C180 and C90/C270 planes (transverse to and along the luminaire axis). For a rotationally symmetrical luminous intensity distribution pattern it is enough to show any one plane. The centre of the diagram corresponds to the midpoint of the luminaire.

Linear Diagram

For a linear diagram (Cartesian diagram) the emission angles are plotted along a straight x-axis and luminous intensity on the y-axis. Apart from that the values in the linear diagram correspond to those of the polar curve.

Did you find it helpful? Yes No

Send feedback Sorry we couldn't be helpful. Help us improve this article with your feedback.

Related Articles

Từ khóa » C0 C180 C90 C270