Slits & Windows
Slits define the entrance apertures of the spectrograph. Mosaic windows define sub-regions of the detector that are read out independently (e.g., individual amplifier regions on a large-format CCD).
Table of contents
Slits Editor
Open with the Slits chip below the mode summary, or via the action menu. The editor appears as a draggable floating window.
Slit Table Columns
| Column | Unit | Description |
|---|---|---|
| Name | — | Unique identifier used in plots and TOML files |
| x | mm | Horizontal center position in the slit plane |
| y | mm | Vertical center position in the slit plane |
| width | mm | Full width of the slit aperture |
| height | mm | Full height of the slit aperture |
| λ range | Å | Wavelength band-pass to render, e.g. 6300:6400 |
Editing
- Click any cell to edit it in place.
- Press Enter or click away to confirm.
- Click Add slit (header button) to append a new row with default values.
- Click the ✕ button on a row to delete that slit.
Deleting a slit cannot be undone within the session. Export your TOML first if you want a backup.
Mosaic Windows Editor
Open with the Windows chip. Draggable floating window.
Window Table Columns
| Column | Unit | Description |
|---|---|---|
| Name | — | Unique identifier for the window |
| x | mm or in | Horizontal center of the window on the detector |
| y | mm or in | Vertical center of the window on the detector |
| width | mm or in | Full width of the window |
| height | mm or in | Full height of the window |
| λ range | Å | Wavelength band-pass expected in this window |
Unit Toggle
The mm / in toggle in the window header switches the display unit for all position and size columns simultaneously. The underlying values are stored in mm regardless.
Mosaic SVG Export
Click Download Mosaic SVG to export the current window layout as a scaled vector-graphics drawing suitable for machining or PCB documentation.
Editing
Same as the Slits editor: click to edit in place, Add window to append, ✕ to remove.
Wavelength Range Setting
A single wavelength range is usually written as min:max or (min:max). For multiple non-overlapping ranges, write them as (min1:max1),(min2:max2) etc. - a comma-separated list of single wavelength ranges inside parentheses. The wavelengths are in Angstroms.