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