Application of Fermat's Principle to Grating Surface
353
different notation and the reader should note these differences when comparing
results given by different authors. Our approach parallels that given in Chapter 5
for a general refracting surface, with those results modified to include the grating
characteristics.
14.1.
APPLICATION OF FERMAT'S PRINCIPLE TO GRATING
SURFACE
Although a plane reflection grating is the element of choice in most grating
spectrometers, we choose to set up a more general case in order to derive the
general grating equation. After showing that this equation for a transmission
grating is similar to that fo ...
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