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