Reply To: Diffraction theory

[Akhil Dutt Vijayakumar]

Hi,

 

Thank you for posting in the forum,

 

The 0th diffraction order carries the most intense light, usually appearing as a peak in the center of the diffraction pattern. However, for precise analysis of a specific wavelength, this order is often not ideal.

The 0th order contains the desired wavelength information along with light that passed straight through (undiffracted), this inclusion of other wavelengths dilutes the spectral purity of the target wavelength. This makes it difficult to accurately measure its intensity and characteristics. 

Therefore, most spectrometers prioritize the information in the higher diffraction orders, primarily the -1st order, for its concentrated peak and purer spectral content.

 

Hope that helps.

Akhil