I Determine emission spectrum of an LED

Click For 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...
 

Similar threads

I Only certain emission lines show up in absorption spectrum
  • · Replies 4 ·
Replies
4
Views
2K
B Obtaining spectrum of Sodium from Sodium Vapour Lamp
  • · Replies 10 ·
Replies
10
Views
3K
I Creating White LEDs: Phosphor vs RGB
  • · Replies 5 ·
Replies
5
Views
1K
I Is This....Right? Splitting LED colors is not working for me
  • · Replies 40 ·
Replies
40
Views
3K
Misc. What emissivity should I use for LED strips?
  • · Replies 3 ·
Replies
3
Views
2K
I Observing Emission Spectra from Computer Screens
  • · Replies 2 ·
Replies
2
Views
2K
I Formation of emission lines and other topics
  • · Replies 5 ·
Replies
5
Views
2K
I Gold's absorbance of blue light
  • · Replies 6 ·
Replies
6
Views
4K
I Calculate Retinal irradiance - from photometric units
  • · Replies 10 ·
Replies
10
Views
8K
Charlieplexing: LEDs have different brightness
  • · Replies 14 ·
Replies
14
Views
2K