Francesco Pepe invited me to see inside the HARPS spectrograph. I was very lucky, because the enclosure was closed for the inauguration, and closed again (probably for years) soon after I took these photos. Of course I had to wear special over-clothes to prevent dust getting into the instrument.
The top photo shows the grating, which splits the starlight into a rainbow, and the bottom one shows the collimator, which narrows the beam.
