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