Patent ID: 9551612
Date: 2017-01-24
CPC Classifications: G01J

Claim:
1. A monochromator, comprising: a light source; a diffraction grating comprising a first periodic surface region and a second periodic surface region; a grating drive motor that rotates the diffraction grating to provide dispersed wavelengths of light from the light source; a detector configured to detect at least one of a portion of the dispersed wavelengths of light or a reflection thereof; and processing circuitry configured to control the grating drive motor to regulate a first angular velocity of the diffraction grating over a first range of motion for the first periodic surface region of the diffraction grating and to regulate a second angular velocity of the diffraction grating over a second range of motion for the second periodic surface region of the diffraction grating based on an angular orientation of the diffraction grating.