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