dispersive-grating
1.In MMS Spectrometers, a dispersive-grating geometry with a wide-area coded aperture takes the place of a traditional slit entrance.
2.Dispersive, fixed-grating spectrometer designs typically use a vertical slit or a fiber as the input into the spectrometer.
3.The linewidth of the laser emission is-5nm when a prism is used as the dispersive element and is reduced even further to-lnm when the prism is replaced by a diffraction grating.

