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