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