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enter image description hereI am designing a transmission grating based spectrometer. Can the angle of incidence on the grating (alpha) be unequal to the diffraction angle (beta)? I didn't think that they could be varied as i wished because they affect the focal lengths of lenses in the optical array. Thanks for your help

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  • $\begingroup$ The meaning of your question is not clear. Please provide a sketch to illustrate the question. $\endgroup$ – S. McGrew Jul 13 at 4:05

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