The image below allows you to follow the paths of photons, from their initial emission on the Sun or in the corona, all the way through the UVCS instrument. The photons in this schematic illustration flow from the top to the bottom, but in reality, inside UVCS they are reflected back and forth several times (see UVCS layout below).
Clicking on items in the path takes you to pages with more information about these items.
Below are two more accurate diagrams of the layout of the different optical components of UVCS. For more detailed information, see the online version of the 1995 UVCS instrument paper.