(3) relates the blaze wavelength of a reflection grating to that of the corresponding transmission grating. Unlike reflection gratings, the groove angle is much larger than the blaze angle for a transmission grating, since the phase retardation doubles upon reflection but is multiplied by n-1 for a transmission grating, where n is the refractive index of the grating medium.Īpplying Snell's law to the interface between the groove facet and air,Ĭombining this relation with the grating equation, yields the relationship between the blaze angle βB and the groove angle χ:įor small groove angles and for λ << d, a useful approximation to Eq. The peak efficiency of a blazed (triangular-groove) transmission grating occurs when the refraction of the incident beam though the mini-prism that constitutes a groove lies in the same direction as the diffraction given by the grating equation. Use the request a quote to get a quote based on your requirements. For additional diffraction grating options and custom capabilities, please see the Features section. Click on a Master Grating Code (last 4 digits of a grating's part number) below to view master grating efficiency curves. The maximum ruled area is groove length x ruled width. Plane transmission gratings are listed in order of groove frequency. Blaze wavelengths listed are for the first-order Littrow configuration.
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