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