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