This is the image slicer output, using a collimated Helium-Neon laser beam as the input. There are pencil marks on the page showing where the light should fall. These are the two effective slits generated by the slicer, each composed of 4 sub-slits. The alignment shown here is not the final alignment, but is very close. For the final appearance of the split-up field, see a laser spectrum produced by the assembled instrument.
Next Picture (spectral output)
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