felt ring
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- optical second harmonic generation
- astro-compass
- checking
- plastic-base mirror
- spherical aberration
- beamsplitting blocks
- spatially bound function
- self-sagging
- Acoustooptic Bragg diffraction
- time-resolved interference spectroscopy
- transit-time lidar velocimeter
- Infrared spectroscopy
- aberration blur circle
- collisionless multiple-photon laser excitation
- pseudocontinuum
- laser
- diffuse reflectance light
- tracking laser radar
- metal lens
- Sonnar lens