Hi,
I ordered a Blazed (Ruled) Grating and datasheet specify 1200 Grooves/mm
What is the Lines/um I should use in for the Diffraction grating surface to simulate that?
Thanks
Question
Diffraction grating line frequency
+2
If one groove is one line (reasonable?), then 1 200 / 1 000 = 1.2 lines/um?
Take care,
David
Thank you David, that’s what I thought but it doesn’t fit with the diffraction orders angle. It looks like there is a factor of 0.5 missing (0.6 lines/um) like one groove which is also the grooves pitch, is half a “line” ???
+2
I would ask your manufacturer to clarify what a groove is.
OpticStudio uses this definition:
Which seem to agree with this Wikipedia figure from the Diffraction Grating article:
The refractive indices in the Wikipedia formula were omitted:
The sign difference is due to the different case treated: reflection in Wikipedia and (probably) transmission in OpticStudio Help File.
I hope this helps.
Take care,
David
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