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