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