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