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