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