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