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