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