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