Broadband infrared LED targets consumer spectroscopy

September 11, 2018 // By Julien Happich
Osram's Synios SFH 4776 broadband infrared LED could soon integrate smartphones, enabling new spectroscopy applications for consumers to check how fresh supermarket food is, measure the calories in canteen meals and verify whether the tablet in their hand really is a painkiller.

Near-infrared spectroscopy enables such things as the water, fat, sugar and protein content of food to be measured. This technology uses the characteristic absorption behavior of certain molecular compounds. If a defined light spectrum is directed at a sample it is possible to determine the presence and quantity of certain ingredients from the wavelength distribution of the reflected light. Because it emits in a wide wavelength range, the SFH 4776, acts as a compact light source for the spectrometer, delivered in a 0.6mm profile 2.75x2.0mm package.


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The new chip is based on a highly efficient, blue-emitting ThinGaN chip in UX:3 technology. A phosphor converter specially developed for spectroscopy converts blue light into infrared light with a broad wavelength range spanning from 650nm to 1050nm. Improvements to the phosphor material allowed developers at Osram Opto Semiconductors to increase light intensity by 60% compared with previous models. This translates into an improved signal-to-noise ratio and simpler analysis of food and medicines.

Osram Opto Semiconductors - www.osram-os.com


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