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