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PM-NFMS: Near-Field Measurement System

Radiant Vision Systems, Test & MeasurementRequest Info
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PM-NFMS: Near-Field Measurement SystemPM-NFMS (ProMetric Near-Field Measurement System) is a two-axis goniometric system that measures brightness, color, and, optionally, spectrum as a function of viewing angle for large light sources. It is designed to provide accurate luminance distribution data for developers of large light sources for automotive, transportation, architectural, and other applications. Because PM-NFMS captures a complete near-field model of the light source, it provides much more comprehensive information - in a much smaller measurement space - than can be obtained from traditional spot meter-based measurements.

By processing the measured data, PM-NFMS can output IES format files, EULUMDAT files, illuminance distribution on a plane as table, and Radiant Source Model™ (RSM) files. The RSM files can be used to generate either photopic, colorimetric or spectral ray sets for use in optical design tools by using ProSource® Software.

The PM-NFMS system software supports light source performance analysis through an extensive variety of quantitative analyses, including isoplots, CIE color analyses and radar plots. In addition, the PM-NFMS software can be used to extrapolate a far-field illumination distribution from the measured near-field RSM. Because the illumination distribution is derived from the near-field data, this results in a substantial reduction in the space required to perform these measurements (<5 meters) when compared to spot meter-based methods where the measurement instrument must be place in the far field (>15 meters).

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Test & MeasurementRadiant Vision SystemsProductslightinglight measurementColor Measurementgoniometercolorimetersphotometerlight designlighting designIESLDTEulumdatradiant source modelspectralspectrumray setsoptical designillumination design

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