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