THE DETERMINATION OF THE SPECTRAL CHARACTERISTICS OF LED SOURCES OF LIGHT AND THE DEFINITION OF THE ACTINIC COEFFICIENT
Abstract
New light-emitting-diode sources of light (LED) require relievable measurement of lighting and energy characteristics of light sources in visible spectrum. Today LED lamps are able n ot only to illuminate premise but the whole world. Development of multicolor LEDs with a broad emission spectrum, including UV area, significantly extends range of their possible use in different housing and utility sectors. Photometrical parameters of lan dscape, architectural, decorative, luminous-signal and interior lighting sets are usually measured by means of conventional gauges, optical detectors of which are adjusted to settings of reference detector, peculiar for given effective value system. Illumination spectrum structure of different lighting sources differs. Therefore the value of so called actinic coefficient, including spectrum structure if light sources, is used technical documents of gauges. Development and implementation of new LED sources provides for determination of such coefficients for different types of lamps, comprising LEDs that have different spectral structure. For today such information is absent or requires verification. This work shows experiment device for measurement of spectrum density of LED source and procedure for calculation of actinic coefficient under LED-based lighting. Proposed methods reduces measurement error upon testing of standard light measuring devices and use different light emission receivers without corrective filters, which is the most critical, if it is necessary to ensure simultaneous measurement in multiple points of light field.Keywords: actinic coefficient, led light sources
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