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