gauge[-block] interferometer
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- astrospectrograph camera
- geometrical focus
- metacrystalline
- infra-red beam folower
- upper state relaxation
- visible emissivity
- time-averaged shadow-moire method
- frequency summing
- optical deformation
- Varotal lens
- chronophotography
- filters
- optical harmonic generation
- diatomic roto
- multilongitudianl-mode laser
- push out
- holographic gratings
- optical head controllers,control ics/modules
- mode pattern
- intensifying screen