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