IS-LI™ Luminous Intensity Measurement System

High speed, low cost, luminous intensity measurement system for LEDs and other small sources.

IS-LI™ is the first system ever offered to enable rapid, comprehensive measurement of far field luminous intensity, radiant intensity, CIE chromaticity coordinates and correlated color temperature (CCT), all as a function of angle, for LEDs and other small light sources. Based on patented Imaging Sphere™ technology developed jointly with Royal Philips Electronics, the IS LI™ acquires data over an entire 2pi steradian in a single measurement, taking just seconds or less. Previously, obtaining these precision measurements required goniometric tools; but, with no moving parts, the new IS-LI™ is orders of magnitude faster than traditional methods. This unique combination of high precision, high resolution and speed enables real-time, production-line QC of LEDs for the first time, and makes the IS-LI™ ideal for R&D purposes as well.

The IS-LI™ system consists of a 20" (550 mm) diameter, hemispherical measurement chamber, mated with our PM-1600 Imaging Colorimeter (with a 512x512 or 1024x1024 pixel detector). In addition, IS LI™ is compatible with selected PM Series™ Imaging Colorimeters and Photometers, for those who require a different dynamic range or resolution. System software supports automated and/or customized measurements, as well as data analysis and display functions. Data can be displayed as isometric plots, cross-sectional graphs, radar plots, bit maps and color graphs.

Detailed Specifications