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