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