Figure: SWS scanner mechanism
- flat scanner mirror mounted on a flexurable pivot (spring)
- driven by a coil in the field of a fixed magnet
- scanning performed in discrete scanner steps
- position measured by a Linear Variable Differential
Transformer (LVDT) sensor
- achieved accuracy: 3" over a total range of +/- 6.5°
Figure: SWS scanner light path
- scanning device is located close to the gratings
- reflects collimated beam onto the grating
and diffracted beam back to the instrument
see also: