Data knitting tandem dispersive range monochromator

摘要

Aspects of a tandem dispersive range monochromator and data knitting for the monochromator are described herein. In one embodiment, the monochromator includes a tandem diffraction grating, a grating drive motor that rotates the tandem diffraction grating to provide, by diffraction of broadband light, first dispersed wavelengths of light and second dispersed wavelengths of light, a detector that detects a first reflection from the first dispersed wavelengths of light and a second reflection from the second dispersed wavelengths of light, and processing circuitry that knits together data values from the first reflection and data values from the second reflection to provide a spectrum of combined data values. By using a tandem diffraction grating having different dispersive surfaces, measurements of relatively high precision and quality may be taken throughout a wider spectral range, and the measurements may be knitted together to provide a spectrum of combined data values.

主权项

1. A monochromator, comprising:
a tandem diffraction grating including a first diffraction grating, a second diffraction grating, and a mounting assembly having a rotatable shaft to rotate the tandem diffraction grating; a grating drive motor that rotates the tandem diffraction grating about a pivot point of the rotatable shaft to provide, by diffraction of broadband light, first dispersed wavelengths of light from the first diffraction grating and second dispersed wavelengths of light from the second diffraction grating; a detector that detects a first reflection of at least a portion of the first dispersed wavelengths of light and a second reflection of at least a portion of the second dispersed wavelengths of light; and processing circuitry that aligns data values from the first reflection with data values from the second reflection and smooths at least a portion of the data values from the first reflection with at least a portion of the data values from the second reflection to provide a combined spectrum of data values across the first dispersed wavelengths of light and the second dispersed wavelengths of light.