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