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  • graded index (GI) Descriptive of an optical fiber having a core refractive index that decreases almost parabolically and radially outward toward the cladding. This type of fiber combines high bandwidth with moderately high coupling efficiency. Sometimes called...
  • gradient index (GRIN) lens A lens whose material refractive index varies continuously as a function of spatial coordinates in the medium. See axial gradient; radial gradient; spherical gradient.
graduated refractive index lensGRINgradient indexgraded indexGIimageimagingoptics
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