One advantage that mirror optics have over lens optics is that mirrors do not introduce chromatic aberration.
2.
It was replaced by a rotating mirror optic in 1996 when the regular light was deactivated and the tower was transferred to the German Navy.
3.
It was one of the instruments on Hubble at launch, but its functionality was severely impaired by the defects of the main mirror optics which afflicted the telescope.
4.
The collisional reaction interface ( CRI ) is a mini-collision cell installed in front of the parabolic ion mirror optics that removes interfering ions by injecting a collisional gas ( He ), or a reactive gas ( H 2 ), or a mixture of the two, directly into the plasma as it flows through the skimmer cone and / or the sampler cone.
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