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LMS-3M Lamp Measurement Sphere

Photonics.com
Jul 2010
Labsphere Inc., PhotonicsRequest Info
 
NORTH SUTTON, N. H., July 8, 2010 — With lighting technology advancing to include larger and more complex devices, Labsphere has introduced the LMS-3M 3-m integrating sphere for complete optical characterization of these larger lamps and luminaires. The sphere complies with IESNA LM-79 and LM-80 standards to deliver accurate and reproducible measurements of any lamp, up to 2-m linear lamps and 30-cm luminaries.

The lamp measurement integrating sphere accommodates light sources positioned base up, base down or longitudinally, to easily and efficiently measure virtually any lamp type, including fluorescents up to 2 m in length. The design also allows for forward and partial flux measurements of test sources that are board-mounted or heat-sinked.

The larger sphere better integrates light for more reliable testing of a device’s photometric and colorimetric performance with measurements of total spectral flux, luminous flux, correlated color temperature, color rendering index and chromaticity. Measurement data relies only on the test device’s true power, not on its size, shape or spectral distribution.

The near-Lambertian properties of the sphere’s Spectraflect interior coating provide a uniform dispersion of light that integrates and reduces hot spots. Spectraflect exhibits reflectance values of 98% and is spectrally flat through the visible spectrum for higher optical efficiency on low-lumen lamps.

The sphere is designed to measure a variety of lamps and luminaires on the same system with little adjustment. The standard geometry accommodates 4pi measurement, and with optional aperture reducers, can be configured for 2pi measurement. Baffled intake and output ports and an ambient air temperature controller maintain and monitor the temperature inside the measurement environment, complying with Energy Star requirements. The new sphere size fully integrates with all of the company’s photometric and spectroradiometric systems and software, so current system users may upgrade easily.

The LMS-3M can be customized with the software and accessories to fit testing needs.



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GLOSSARY
chromaticity
The qualities of color associated with hue and saturation, but not brightness or lightness.
color rendering index
A CIE index describing the changes in color of standard test objects when the illumination is changed from a standard to a test illuminant.
correlated color temperature
Temperature of the blackbody having chromaticity nearest to that of the test source on a specified chromaticity diagram.
luminous flux
Descriptive of the radiant power of visible light modified by the eye response. It is the measure of the flow of visible light energy past any given point in space in a given time period, and is defined as the amount of flux radiated by a source of 1 candela into a solid angle of 1 steradian.
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