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