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