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