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