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