Abstract
An analysis has been made of some wavelength dispersion problems associated with the McPherson model 225 1-m VUV scanning monochromator. The measurements show a periodic error in the dispersion of such a monochromator, refocussed for a fast-ion beam light source. They indicate a wavelength error from this source of up to ±0.1 Å with a period of 25 Å, this latter corresponding to one rotation of the grating drive screw.
© 1981 Optical Society of America
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