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