I Determine emission spectrum of an LED

AI Thread Summary
The discussion revolves around determining the emission spectrum of 660nm LEDs, which appear orange rather than deep red. Participants suggest checking the LED datasheet, using a prism, or employing a digital camera to analyze the spectrum by capturing RGB values. Some experiments with a CD as a diffraction grating yield inconclusive results, leading to discussions about the limitations of inexpensive cameras and the potential effects of image compression on data accuracy. Overall, the conversation highlights the challenges of accurately measuring LED spectra and the need for better equipment or methods for reliable results.
  • #51
OmCheeto said:
I decided last night, while laying in bed, that I could just flip the diffraction grating around, and take two photos.
I believe this would tell me whether it is barrel distortion or grating warpage that is giving anomalous readings.

Seems reasonable enough- curious to know what happens...
 

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