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