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