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