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