# +1 order efficiency in a blazed transmission grating

1. Jan 22, 2015

### Ljungholm

1. The problem statement, all variables and given/known data
I have a blazed transmission-grating with a known blaze-angle θB and refractive index n. Is there a way (as with a blazed reflection-grating) to calculate at what incident angle maximum efficiency will be achieved for the m'th order diffraction given a wavelength?

Edit: Of course the N of grooves/mm is also known.

Thank you

Last edited: Jan 22, 2015
2. Jan 27, 2015