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