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