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