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