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