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