Spectro Sensor Unit

Application note

1.Color Measurement of LED

1. Abstract
Spectral profiles of a LED were acquired by the Spectro Sensor OSS-0081(CMOS multichannel spectrometer). After the data processing, subtle color difference under the varied condition was detected.

2. Introduction
As assembled, the LEDs in the same product line have variation in the chromaticity of their emission. In case for some precise applications, they are screened or sorted one by one after the color measurement. In this report, the LEDs' color variation is emulated by the slight change of a blue LED's color corresponding to its operating current. The chromaticity was calculated according to the CIE Standard from the spectral profiles acquired by the OSS-0081.

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