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