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