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