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