In this article, we discuss unique measurement considerations for ensuring the quality of LED sources, and equipment for measuring LED displays, individual sources, and luminaires.
With the excitement surrounding the emergence of LED lighting and displays it is becoming increasingly important to be able to measure the performance of LEDs and LED-based systems in accurate and meaningful ways. This is even more important as LEDs are increasingly used as an alternative to more traditional technologies.
In this article published by Global LEDs/OLEDs, Radiant surveys a number of measurement methods that generate either near-field or far-field models of the LED or luminaire and evaluate their strengths and weaknesses to guide us in selecting the right measurement method for the application.
Southern California-based Deco Lighting is a manufacturer of innovative and intelligent LED lighting solutions. Learn how Radiant's Near-Field Measurement System is helping this leading company to deliver value to its customers.
In this article, we describe a method for the measurement of large light sources in a limited space that efficiently overcomes the physical limitations of traditional far-field measurement techniques. The measurement is performed from within the near-field of the light source, enabling a compact measurement set-up, and generates a detailed near-field color and luminance distribution model that can be directly converted to ray sets for optical design and that can be extrapolated to far-field
For optical design and product qualification, the output color and luminance distributions of large light sources are needed to qualify and predict the performance of architectural, automotive, street, security, entertainment and other lighting systems. However, these distributions are difficult to measure because of both the size of the source and the large space required for the measurement.
The invention of the electric light bulb changed the world. It enables human activity at all times of day or night, and in all ambient light conditions. The first commercially available bulbs were released in 1880, manufactured by Thomas Edison’s company, the Edison Electric Light Company. The resulting demand for electric lighting propelled the building of vast electrical distribution infrastructure to bring power to homes and businesses in the following decades.
Near-Field Measurement Systems (NFMS) offer many benefits for characterizing lighting fixtures, including LED sources and luminaries, for intensity distribution and total flux measurements at any distance. Using Radiant's NFMS paired with PM-NFMS™ software, you can generate high-resolution 3D models and 2D spatial measurements of luminance and color as viewed from each angular position of the lighting fixture.
Learn the principles of light and color as perceived by human observers, and how to use Near-Field Measurement Systems to achieve measurements of luminance and color as viewed from each angular position of the lighting fixture, enabling the most accurate characterization of light sources in R&D environments and labs.In this Presentation, you will learn about:
Learn best practices for achieving light and color characterization for large light sources using Near-Field light measurement techniques for the most accurate and objective luminance data on fixtures as viewed from any angle. This presentation describes:Why Luminaires Need TestingNear- versus Far-FieldThe Far-Field MethodThe Near-Field MethodExtraction of Useful InformationAdvantage of Near-Field Testing
The PM-NFMS™ system performs brightness and color measurements as a function of view angle for large light sources. It provides accurate near-field luminance distribution data for developers of large light sources, for automotive, transportation, architectural, and other applications.
Learn the importance of Radiant Source Models for characterizing luminance and geometry of light rays at each view angle of a light source. Light sources can be represented through either Near-Field or Far-Field data, with Near-Field data offering significant advantages to understanding how light arrays originate from multiple points in a light source, thereby detecting source defects more precisely.
The ProMetric® Near Field Measurement System (PM-NFMS™) performs brightness and color measurements as a function of view angle for large light sources. The SP-1000 is a fully-featured spectrometer configured for light source measurement as part of PM-NFMS Near Field Measurement Systems. The SP-1000 is mounted on any ProMetric® Imaging Colorimeter.This Spec Sheet features:Product SpecificationsNFMS System Requirements