Optical: systems and elements – Lens – With graded refractive index
Patent
1998-12-22
2000-07-11
Epps, Georgia
Optical: systems and elements
Lens
With graded refractive index
359652, G02B 300
Patent
active
060881666
ABSTRACT:
GRIN lenses are made by an ion/exchange process. In order to make a GRIN lens whose gradient index varies slowly radially, a cylindrical glass rod of a sufficiently large diameter is immersed in a salty bath. The size of the lens may be reduced by grinding, polishing or chemically etching away a peripheral optically dispensable portion of the lens away from the axis of the lens so that the outer diameter of the lens is as small as 0.8 millimeters. When such a smaller lens is used in optical components such as circulators, switches, WDM's and isolators, such optical devices would also be reduced in size to fit within a limited space.
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Dicon Fiberoptics, Inc.
Epps Georgia
Lester Evelyn A.
LandOfFree
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