FOS: BEFORE and AFTER

ST-ECF

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More post-operational pictures of FOS: These pictures were taken during a visit to a storage facility of the Smithonian's National Air and Space Museum in June 1999. In summer 1999 the FOS was put on display in the museum. In preparation for that the original metal housing of the FOS had already been partially removed and replaced by plexi-glas covers exposing the interior structure of the FOS. On some parts also the protective fabric (black) and the thermal blankets (gold) have been removed.

1. Overview of the FOS instrument box

2. Close-up of the entry section of the optical path

5. Close-up of the middle section of the optical path

3. Close-up of the entry section of the optical path II

6. Close up of
grating

4. Close-up of the filter grating wheel assembley

7. Close-up of the digicon assembly

Further explanation of the instrument can be found in this brief technical overview.

More pictures of FOS and the digicons during construction some two decades earlier.