blocking filter
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- upper state relaxation
- optical deformation
- visible emissivity
- diatomic roto
- chronophotography
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- optical harmonic generation
- multilongitudianl-mode laser
- astrospectrograph camera
- holographic gratings
- frequency summing
- push out
- infra-red beam folower
- optical head controllers,control ics/modules
- mode pattern
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- metacrystalline
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