Free Access

Fig. 7


Relative variations in the LED current, measured as the voltage drop across a resistor in series with the LED and monitored over a duration of 3 weeks. During this period, the LED head was operated without interruption on our spectrophotometric test bench. During this run the temperature varied by about 5 °C. As can be seen, the current varies by a few 10-5 at most.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.