| Subject | 
has wavefront modification | 
has definition | 
is a kind of | 
| wavefront modifier | shape, polarization or wavelength | A device which modifies the wavefront shape, polarization or wavelength | optical device | 
| optical fibre | shape | Glass and transparent plastics can be made into a very thin wire or fiber. Typical dimensions are 10-50 µm. If a ray enters one end of a fiber at the appropriate angle, it will undergo total internal reflection and travel down the fiber without much loss through the sides. | wavefront modifier |