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