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