Illumination

The future of LEDS lies some way beyond the humble LED bulb. (Image: LariBat/shutterstock.com)

 

LEDs: filling the world with white light

As nations turn to LED lighting to save energy and cut emissions, industry players are still chasing efficiencies and searching for the elusive, right light, reports Rebecca Pool

Radiometry & photometry: The dark art of light metrology

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The science of measuring the amount, spectral and spatial distribution of light emitted by a source is generally poorly understood. Few university-level physics or engineering syllabuses review the principles of optical radiation measurement, let alone the practicalities. This is despite our interacting with light almost constantly, both in nature and in our work and leisure activities. This white paper reviews the fundamental principles of light metrology.

Spectral, spatial and temporal optimization of solid-state light engine output

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Specifications for illumination systems for biomedical imaging and industrial metrology generally converge on spectral, spatial and temporal light output characteristics. This article describes some of the ways in which solid-state light engines consisting of arrays of solid-state light sources, a mix of LEDs, light pipes and lasers, allow for the customisation of specifications to meet application-specific lighting requirements.

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